weed control trials research report 2016 · 2020-07-28 · 2016 . p.h. sikkema. go to edible bean...

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WEED CONTROL TRIALS

RESEARCH REPORT

2016

P.H. Sikkema

GO TO EDIBLE BEAN REPORT

GO TO PROBLEM WEED REPORT

TOLERANCE AND WEED CONTROL IN CORN, SOYBEAN AND WHEAT

RESEARCH RESULTS 2016

ACKNOWLEDGEMENTS

We appreciate the cooperation and assistance provided by the representatives of the various agricultural companies; their ideas, the herbicide samples they have provided for the research work, as well as their monetary assistance. Funding for the 2016 weed management research program was also provided by the following: Grain Farmers of Ontario Ontario Bean Growers Growing Forward 2 We also appreciate the cooperation of the following seed companies who provided the seed: DeKalb Canada Inc. and Pioneer.

Additionally, thank you to the farmer co-operators whom often assist our research by working the land, applying fertilizer, and planting the crop at our off-station sites.

Technical Assistants Research Technicians Summer Assistants Jonathan Brinkman Meaghan Burns Michelle Louwagie Lynette Brown Meghan Dilliott Deanna Martin Todd Cowan Heather Hendriks Britt Robinson Chris Kramer Shelby Johnston Emily Robinson Christy Shropshire Laura Louwagie Jenna Wilson Matt Underwood We trust that the information provided by this research will further the science of weed management by assisting companies with the registrations and labeling of their products. This information will also allow research and extension personnel to provide proper herbicide recommendations, thereby enabling growers to achieve consistent, broad spectrum weed control with a minimum of crop damage.

P.H. Sikkema Ridgetown Campus, University of Guelph

N0P 2C0 (519) 674-1500 ext. 63603 [email protected]

2016 WEATHER DATA

RIDGETOWN CAMPUS

RAINFALL IN MM. DATE APRIL MAY JUNE JULY AUGUST SEPT. OCT.

1 0 4.8 0 5.8 8.8 0 2.9 2 2.1 8.5 0 0.2 0 0 3.8 3 - 0.2 0 0 0 0 0 4 0.2 0 11.1 0 0 0.2 0 5 0 0 11 0 9.4 0 0 6 5.8 0 0 1.3 0 0 0.6 7 10.1 0 0 0 0 0 0 8 0.8 0 0 46.1 0 3.8 0 9 0.2 0 0 0 0 0 0.5

10 8 0 0 0 0 20.3 0 11 1.2 0 0 0 0 0 0 12 0 10.5 0 0.8 - 0 1.2 13 0 0.4 0 13.7 17.2 0 0 14 0 5.1 0 0 0.6 0 0.3 15 0 0.2 0 0 2.2 0 0 16 0 0 21.7 0 15.5 0.2 0 17 0 0 0 0 - 19.9 0 18 0 0 0 0 0 0.3 0 19 0 0 0 0 0 0 0.3 20 0 0 0 0 2.3 0 6.2 21 2.4 0 0 0 0 0 5.1 22 0 0 0 3 0 0 0.2 23 - 0.4 0 0 0 0 1.7 24 0 0 0.4 0 2.4 0 0 25 0 0 - 0 0 0 0.4 26 - 3 6.7 0 0 3.3 - 27 0 0 0 0.4 5.4 0 4.7 28 0 2.9 - - 0 0.5 0 29 6.2 0 0 2.4 0 30.3 0 30 7.4 0 0.2 0 0 17.8 5.6 31 0 5.5 1.1 0

TOTAL 44.4 36 51.1 79.2 64.9 96.6 33.5 30 YEAR AVG. 82.7 88.4 88.3 86.7 90.8 95.6 77.7

TEMPERATURE (C)

MEAN MAX 11.4 20.1 25.5 27.8 27.9 24.9 17.6 MEAN MIN 0.1 7.6 12.3 15.7 16.5 12.5 6.6

MEAN 5.8 13.8 18.9 21.8 22.1 18.7 12.3 TEMPERATURE, 30 YEAR AVERAGE (C)

MEAN MAX 11.7 18.0 23.4 26.0 25.2 21.4 14.9 MEAN MIN 2.3 8.2 13.7 16.3 15.4 11.8 6.1

MEAN 7.0 13.2 18.6 21.1 20.3 16.6 10.5 Weather data

provided by: and

2016 WEATHER DATA

HURON RESEARCH STATION

RAINFALL IN MM. DATE APRIL MAY JUNE JULY AUGUST SEPT. OCT.

1 0 4.2 1.3 6.1 25.4 0 3.9 2 0.8 2.1 0 0 1.1 0 0.8 3 0 0 0 0 0 0 10.9 4 0 0 7.5 0 0 0 0 5 0 0 19 0 0 0 0 6 6.6 0 1.6 0 0 0 0 7 10.2 0.2 0.3 0 0 5.9 0 8 0 0 1.6 31.5 0 1.8 5.4 9 0 0 1.2 1.7 0 0 0

10 0 0 0 0 0 3.8 0 11 0.2 0 0.6 0 32.7 0 0 12 4.2 17 0 0 1.8 0 2.8 13 0 6 0 14.5 45.5 4.1 5.7 14 0 12.2 0 12.8 0.3 5.1 0 15 0 0 6 0.8 0 0 0 16 0 3.6 3.7 0 28.9 0 21.9 17 0 0 0.3 0 5.2 8.2 0.3 18 0 0 0 0.8 0 0 0.3 19 0 0 0 0 4.4 0 0.3 20 0 0 13.2 0 3.1 0 13.5 21 3 0 0 1.1 3.3 0 2.3 22 0 0 3.2 0 0.3 0 0.6 23 0 0 0 0 0 0 0.9 24 0 0 0 0 7.1 0 2.3 25 0 0 0 3 2.6 0 1.5 26 15.3 5.6 2.8 0 0.3 8.6 4.3 27 0 0 0 0 3.3 0 7.6 28 0 0.3 0.3 0 0 0 0.3 29 0 10.8 0 0 0.3 0.6 0 30 1.4 0 0.5 0.6 0 2.9 0.8 31 0 16.8 0 0.3

TOTAL 41.7 62 63.1 89.7 165.6 41 86.7 30 YEAR AVG. 75.3 85 85.5 98.2 70.1 108.9 97.2

TEMPERATURE (C)

MEAN MAX 11.3 20.5 25.3 27.6 27.8 24.9 16.7 MEAN MIN 0.8 8.0 12.0 16.1 16.7 12.4 7.0

MEAN 6.0 14.3 19.0 22.2 22.3 18.6 11.8 TEMPERATURE, 30 YEAR AVERAGE (C)

MEAN MAX 12.2 19.5 24.5 26.5 25.6 22.0 14.6 MEAN MIN 2.0 8.0 13.1 15.2 14.6 11.0 5.4

MEAN 7.1 13.8 18.9 20.9 20.1 16.4 10.0 Weather data

provided by: and

BAYER CODE ABBREVIATIONS

Code Common Name Scientific Name ABUTH Velvetleaf Abutilon theophrasti AMAPO Green pigweed Amaranthus powellii AMARE Redroot pigweed Amaranthus retroflexus AMASS Pigweed species Amaranthus spp. AMATA Common waterhemp Amaranthus tamariscinus AMBEL Common ragweed Ambrosia artemisiifolia AMBTR Giant ragweed Ambrosia trifida ATXPA Spreading atriplex Atriplex patula CAPBP Shepherd’s-purse Capsella bursa-pastoris CHEAL Common lamb’s-quarter Chenopodium album CIRAR Canada thistle Cirsium arvense DAUCA Wild carrot Daucus carrota EQUAR Field horsetail Equisetum arvense ERIAN Annual fleabane Erigeron annuss ERICA Canada fleabane Conyza canadensis ERYCH Wormseed mustard Erysimum cheiranthoides HIBTR Flower-of-an-hour Hibiscus trionum LACSE Prickly lettuce Lactuca serriola LAMAM Henbit Lamium amplexicaule MEDSA Alfalfa Medicago sativa OXAST Common yellow woodsorrel Oxalis stricta PHSAN Adzuki bean Phaseolus angulatus PLAMA Broad-leaved plantain Plantago major POLCO Wild buckwheat Polygonum convolvulus POLLA Green smartweed Polygonum lapathifolium POLPE Lady’s-thumb Polygonum persicaria POROL Purslane Portulaca oleracea SINAR Wild mustard Sinapis arvensis SIYAN Bur-cucumber Sicyos angulatus SOLCA Horsenettle Solanum carolinense SOLPT Eastern black nightshade Solanum ptycanthum SONAR Perennial sowthistle Sonchus arvensis SONAS Spiny annual sowthistle Sonchus asper SONOL Annual sowthistle Sonchus oleraceus SOOCA Canada goldenrod Solidago canadensis STEME Common chickweed Stellaria media TAROF Dandelion Taraxacum officinale TRFPR Red clover Trifolium pratense TRFSS Clover species Trifolum spp. VICSA Common vetch Vicia sativa XANST Common cocklebur Xanthium strumarium

AGRRE Quackgrass Agropyron repens CCHPA Longspine sandbur Cenchrus pauciflorus DIGIS Smooth crabgrass Digitaria ischaemum DIGSA Large crabgrass Digitaria sanguinalis DIGSS Crabgrass species Digitaria spp. ECHCG Barnyard grass Echinochloa crus-galli ERAME Stinkgrass Eragrostis megastachya GGGAN Annual grass species MUHFR Wirestem muhly Muhlenbergia frondosa PANCA Witch grass Panicum capillare PANDI Fall panicum Panicum dichotomiflorum PANMI Proso millet Panicum miliaceum SETLU Yellow foxtail Setaria glauca SETVI Green foxtail Setaria viridi

TABLE OF CONTENTS

CORN

WEED MANAGEMENT IN CORN WITH GROUP 15 HERBICIDES APPLIED PREMERGENCE I (FC16B1A) .................................. 1

WEED MANAGEMENT IN CORN WITH GROUP 15 HERBICIDES APPLIED PREMERGENCE II (FC16B1B).................................. 3

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES FOLLOWING PREEMERGENCE HERBICIDES IN CORN I (FC16B7A) ................................................................................................................................................................... 5

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES FOLLOWING PREEMERGENCE HERBICIDES IN CORN II (FC16B7B) .................................................................................................................................................................. 8

WEED CONTROL IN CORN WITH SYNGENTA HERBICIDES (FC16B8) ..................................................................................... 11

EFFECT OF GLYPHOSATE PLUS FUNGICIDE APPLIED AT V4-V6 ON CROP INJURY, WEED CONTROL, DISEASE CONTROL AND CORN YIELD I (FC16C2A) ....................................................................................................................................................... 13

EFFECT OF GLYPHOSATE PLUS FUNGICIDE APPLIED AT V4-V6 ON CROP INJURY, WEED CONTROL, DISEASE CONTROL AND CORN YIELD II (FC16C2B) ................................................................................................................................................... 15

TOLERANCE OF CORN TO GLYPHOSATE + 2,4-D APPLIED POST I (DEKALB 52-61 & PIONEER P0094AM) (FC16C3A) .......... 17

TOLERANCE OF CORN TO GLYPHOSATE + 2,4-D APPLIED POST II (DEKALB 52-61 & PIONEER P0094AM)(FC16C3B). ......... 25

WEED MANAGEMENT IN CORN WITH BROMOXYNIL PLUS ADJUVANTS (FC16C6) .............................................................. 33

BROADLEAF WEED CONTROL IN CORN WITH 2,4-D APPLIED POSTEMERGENCE (FC16C10) ............................................... 35

BROADLEAF WEED CONTROL IN CORN WITH AGH 02007 APPLIED POSTEMERGENCE (FC16C11) ...................................... 37

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES IN CORN I (FC16C13A) ......................................... 39

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES IN CORN II (FC16C13B) ........................................ 42

SOYBEAN

EFFECT OF ROUNDUP XTEND (MON 76981) RATE AND TIMING IN RR XTEND SOYBEAN I (SY16A1A) ................................ 45

EFFECT OF ROUNDUP XTEND (MON 76981) RATE AND TIMING IN RR XTEND SOYBEAN II (SY16A1B) ............................... 48

BENEFIT OF PYROXASULFONE AND FLUMIOXAZIN IN RR XTEND SOYBEAN (SY16A2) ......................................................... 51

WEED MANAGEMENT IN SOYBEAN WITH GROUP 15 HERBICIDES APPLIED PREMERGENCE I (SY16B1A) ........................... 54

WEED MANAGEMENT IN SOYBEAN WITH GROUP 15 HERBICIDES APPLIED PREMERGENCE II (SY16B1B) .......................... 55

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES AFTER THE APPLICAITON OF PREEMERGENCE HERBICIDES IN SOYBEAN I (SY16B7A) ................................................................................................................................... 57

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES AFTER THE APPLICATION OF PREEMERGENCE HERBICIDES IN SOYBEAN II (SY16B7B) .................................................................................................................................. 59

WEED MANAGEMENT IN SOYBEAN WITH S-METOLACHLOR/METRIBUZIN (SY16B8) .......................................................... 61

WHAT IS THE EFFECT OF LATE EMERGING WEEDS ON THE YIELD OF ROUNDUP READY SOYBEAN I (SY16C1A) ................. 63

WHAT IS THE EFFECT OF LATE EMERGING WEEDS ON THE YIELD OF ROUNDUP READY SOYBEAN II (SY16C1B) ................ 66

WHAT IS THE EFFECT OF LATE EMERGING WEEDS ON THE YIELD OF ROUNDUP READY SOYBEAN III (SY16C1C) ............... 70

WEED MANAGEMENT IN RR SOYBEAN WITH GLYPHOSATE PLUS ADJUVANTS (SY16C7) .................................................... 73

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES IN SOYBEAN I (SY16C8A) ..................................... 75

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES IN SOYBEAN II (SY16C8B) ..................................... 78

SPRING CEREALS

WEED MANAGEMENT IN SPRING BARLEY WITH BROMOXYNIL PLUS ADJUVANTS (SB16C2) .............................................. 81

WEED MANAGEMENT IN SPRING BARLEY WITH CLOPYRALID PLUS ADJUVANTS (SB16C3) ................................................ 83

WEED MANAGEMENT IN SPRING OATS WITH BROMOXYNIL PLUS ADJUVANTS (SO16C1) ................................................. 85

WEED MANAGEMENT IN SPRING WHEAT WITH BROMOXYNIL PLUS ADJUVANTS (SW16C2) ............................................. 87

WEED MANAGEMENT IN SPRING WHEAT WITH CLOPYRALID PLUS ADJUVANTS (SW16C3) ............................................... 89

WINTER WHEAT

TOLERANCE OF WINTER WHEAT TO HERBICIDE PLUS FUNGICIDE (TWINLINE) PLUS FOLIAR FERTILZIER TANKMIXES I (WW16T1A) ........................................................................................................................................................................... 91

TOLERANCE OF WINTER WHEAT TO HERBICIDE PLUS FUNGICIDE (TWINLINE) PLUS FOLIAR FERTILZIER TANKMIXES II (WW16T1B) ........................................................................................................................................................................... 97

TOLERANCE OF WINTER WHEAT TO HERBICIDE PLUS FUNGICIDE (STRATEGO) PLUS FOLIAR FERTILZIER TANKMIXES I (WW16T2A) ......................................................................................................................................................................... 101

TOLERANCE OF WINTER WHEAT TO HERBICIDE PLUS FUNGICIDE (STRATEGO) PLUS FOLIAR FERTILZIER TANKMIXES II (WW16T2B) ......................................................................................................................................................................... 107

TOLERANCE OF WINTER WHEAT TO HERBICIDE PLUS FUNGICIDE (QUILT) PLUS FOLIAR FERTILZIER TANKMIXES I (WW16T3A) ......................................................................................................................................................................... 111

TOLERANCE OF WINTER WHEAT TO HERBICIDE PLUS FUNGICIDE (QUILT) PLUS FOLIAR FERTILZIER TANKMIXES II (WW16T3B) ......................................................................................................................................................................... 117

Edible Bean Research Report

Problem Weed Research Report

1

WEED MANAGEMENT IN CORN WITH GROUP 15 HERBICIDES APPLIED PREMERGENCE I CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16B1A CROP: ZEAMX, FIELD CORN (RR & LL) (DKC 53-56). Planted: May-6-16, 78800 SEEDS/HA, 5 CM Deep, 75 CM Row Width. Planting Method: CONV. Emerged On: May-20-16. Expt. Design: RACOBL. Reps: 4. Plot Size: 2 m x 10 m. Expt. Location: RC - Range B7. Site Description: Soil Texture: SCL. %OM: 3.2 %Sand: 49.7 %Silt: 25.2 %Clay: 25.1 pH: 7.1 CEC: 10.8. Application Description

A Application Date: May-9-16 Time of Day: 13:30 Application Timing: PRE Air Temperature, Unit: 17.2 C % Relative Humidity: 41.2 Wind Velocity, Unit: 8.3 KPH Wind Direction: SE Dew Presence (Y/N): N Soil Temperature, Unit: 18.7 C Soil Moisture: @ DEPTH % Cloud Cover: 50

Application Equipment

A Operating Pressure, Unit: 207 kPa

Nozzle Type: LOW DRIFT Nozzle Size: ULD120-02 Nozzle Spacing, Unit: 50 CM Nozzles/Row: 4 Boom Length, Unit: 2 M Boom Height, Unit: 50 CM Carrier: WATER Spray Volume, Unit: 200 L/ha Propellant: CO2

Crop Stage At Each Application

A Crop 1 Code, BBCH Scale: ZEAMX C Stage Scale Used: BBCH Stage Majority, Percent: NO EMERG

Pest Stage At Each Application

A Pest 1 Code, Type, Scale: ABUTH W Stage Majority, Percent: NOT EM Pest 2 Code, Type, Scale: AMBEL W Stage Majority, Percent: NOT EM Pest 3 Code, Type, Scale: CHEAL W Stage Majority, Percent: NOT EM Pest 4 Code, Type, Scale: POLPE W Stage Majority, Percent: NOT EM Pest 5 Code, Type, Scale: ECHCG W Stage Majority, Percent: NOT EM Pest 6 Code, Type, Scale: SETVI W Stage Majority, Percent: NOT EM

Pest Code ABUTH AMBEL CHEAL POLPE ECHCG SETVI ABUTH AMBEL Crop Code ZEAMX ZEAMX ZEAMX ZEAMX Rating Date Jun-3-16 Jun-17-16 Jun-6-16 Jun-6-16 Jun-6-16 Jun-6-16 Jun-6-16 Jun-6-16 Jul-4-16 Jul-4-16 Rating Type INJURY INJURY CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL Rating Unit % % % % % % % % % % Crop Stage Majority V4 V6 V4 V10-11 Crop Stage Minimum/Maximum V2 V4 V5 V6 V3 V5 V9 V11 Crop Stage Scale 10-30 CM 40-70 CM 30-40 CM 1.1-1.6M Pest Stage Majority 4-8 LF 6 LF 5 LF 3L-2TIL 4L-2TIL 3-4 LF 20+LF Pest Stage Minimum/Maximum 6-15 CM 8-10 CM 8-10 CM 5-10 CM 5-10 CM 5-7 CM 45-75 CM Pest Density, Unit 26 /M2 14 /M2 12 /M2 18 /M2 22 /M2 6 /M2 40 /M2 Footnote Number 1 Trt-Eval Interval 14 DAE 28 DAE 28 DA-A 28 DA-A 28 DA-A 28 DA-A 28 DA-A 28 DA-A 56 DA-A 56 DA-A Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 1 2 3 4 5 6 7 8 9 10

1 Weedy control 0 a 0 a 0 b 0 c 0 c 0 b 0 c 0 c 0 b 0 c 2 Weed free control 0 a 0 a 100 a 100 a 100 a 100 a 100 a 100 a 100 a 100 a 3 dimethenamid-p 720 EC 544 g AI/ha A 0 a 0 a 0 b 18 b 30 b 8 b 18 bc 18 bc 0 b 5 bc 4 pethoxamid (CHA-2735) 480 EC 840 g AI/ha A 0 a 0 a 0 b 0 c 15 bc 0 b 0 c 0 c 0 b 5 bc 5 pyroxasulfone 85 WG 100 g AI/ha A 0 a 0 a 0 b 0 c 13 bc 0 b 0 c 0 c 0 b 0 c 6 s-metolachlor 915 EC 1050 g AI/ha A 0 a 0 a 0 b 5 c 5 c 0 b 20 b 20 b 0 b 15 b

LSD (P=.05) 0.0 0.0 0.0 9.8 21.6 9.2 19.9 19.9 0.0 12.0 Standard Deviation 0.0 0.0 0.0 6.5 14.4 6.1 13.2 13.2 0.0 8.0 CV 0.0 0.0 0.0 31.72 53.04 34.18 57.77 57.77 0.0 38.2

Footnote Number 1: LACK OF SIGNIFICANT RAINFALL TO ACTIVATE PRES.

2

WEED MANAGEMENT IN CORN WITH GROUP 15 HERBICIDES APPLIED PREMERGENCE I CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16B1A Pest Code CHEAL POLPE ECHCG SETVI Crop Code ZEAMX ZEAMX Rating Date Jul-4-16 Jul-4-16 Jul-4-16 Jul-4-16 Oct-18-16 Oct-18-16 Rating Type CONTROL CONTROL CONTROL CONTROL YIELD YIELD Rating Unit % % % % T/HA BU/AC Pest Stage Majority 20+LF 3-20+LF 4-7 TIL 2-6TIL Pest Stage Minimum/Maximum 32-84 CM 7-64 CM 36-63 CM 36-78 CM Pest Density, Unit 22 /M2 22 /M2 45 /M2 10.5/M2 Trt-Eval Interval 56 DA-A 56 DA-A 56 DA-A 56 DA-A 162 DA-A 162 DA-A Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 11 12 13 14 17 18

1 Weedy control 0 b 0 b 0 b 0 b 3.72 b 59.3 b 2 Weed free control 100 a 100 a 100 a 100 a 11.47 a 182.7 a 3 dimethenamid-p 720 EC 544 g AI/ha A 0 b 0 b 0 b 0 b 3.60 b 57.4 b 4 pethoxamid (CHA-2735) 480 EC 840 g AI/ha A 8 b 0 b 0 b 0 b 4.71 b 75.0 b 5 pyroxasulfone 85 WG 100 g AI/ha A 5 b 0 b 0 b 0 b 4.43 b 70.6 b 6 s-metolachlor 915 EC 1050 g AI/ha A 0 b 0 b 0 b 0 b 4.93 b 78.5 b

LSD (P=.05) 11.4 0.0 0.0 0.0 2.059 32.80 Standard Deviation 7.6 0.0 0.0 0.0 1.366 21.76 CV 40.44 0.0 0.0 0.0 24.95 24.95

Conclusions: This experiment was established in corn to compare the weed control of efficacy of four Group 15 herbicides (dimethenamid-p, pethoxamid, pyroxasulfone and s-metolachlor) applied PRE. The PRE herbicides were applied on May 9 with 41.6 mm of rainfall in the next 37 days which fell in 8 rain events. This influenced the weed control with the PRE herbicides. At 14 and 28 DAE, there was no commercially significant injury in corn from the Group 15 herbicides applied PRE. At 28 and 56 DAA, all four Group 15 herbicides provided poor control of velvetleaf, common ragweed, lamb’s-quarters, lady’s thumb, barnyard grass and green foxtail. There was no difference in corn yield among the Group 15 herbicides evaluated.

3

WEED MANAGEMENT IN CORN WITH GROUP 15 HERBICIDES APPLIED PREMERGENCE II

TODD COWAN, PETER SIKKEMA EXPERIMENT ID: FC16B1B CROP: ZEAMX, Corn (DKC 42-42 RIB). Planted: 6-5-16, 82000. S/H, 4 CM Deep, 75 CM Row Width. Planting Method: PLANTD. Emerged On: 23-5-16. FIELD Site. Expt. Design: RACOBL. Reps: 4. Plot Size: 2 m x 11 m. Expt. Location: HRS - Range S10S. Site Description: Soil Texture: L. %OM: 3.2 %Sand: 37 %Silt: 37 %Clay: 26 pH: 7.7 CEC: 27.3. Application Description

A Application Date: 7-5-16 Time of Day: 7:35 AM Application Method: CO2 SPRAY Application Timing: PRE Application Placement: SOIL Applied By: TC Air Temperature, Unit: 15.4 C % Relative Humidity: 54.5 Wind Velocity, Unit: 5 KPH Wind Direction: S Dew Presence (Y/N): N no Soil Temperature, Unit: 11.3 C Soil Moisture: SB-M SF-D % Cloud Cover: 40


A Crop 1 Code, BBCH Scale: ZEAMX BCOR Stage Scale Used: BBCH Stage Majority, Percent: NO EMER


A

Pest 1 Code, Type, Scale: CHEAL W Stage Majority, Percent: NO EM Pest 2 Code, Type, Scale: AMARE W Stage Majority, Percent: NO EM Pest 3 Code, Type, Scale: POLPE W Stage Majority, Percent: NO EM Pest 4 Code, Type, Scale: POLCO W Stage Majority, Percent: NO EM Pest 5 Code, Type, Scale: SETVI W Stage Majority, Percent: NO EM


A Appl. Equipment: CO2 SPRAYER Equipment Type: BACSPR Operation Pressure, Unit: 241 kPa Nozzle Type: LOW DRIFT Nozzle Size: ULD 12002 Nozzle Spacing, Unit: 50 CM Boom Length, Unit: 2 M Boom Height, Unit: 50 CM Carrier: WATER Spray Volume, Unit: 200 L/ha Mix Size, Unit: 1.76 liters Propellant: CO2

Pest Code CHEAL AMARE POLPE POLCO SETVI CHEAL AMARE POLPE POLCO Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Rating Date 6-6-16 20-6-16 3-6-16 3-6-16 3-6-16 3-6-16 3-6-16 4-7-16 4-7-16 4-7-16 4-7-16 Rating Type INJURY INJURY CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL Rating Unit % % % % % % % % % % % Crop Stage Majority V5, 6LF V7, 9 LF V4, 6LF V4, 6LF V4, 6LF V4, 6LF V4, 6LF V8,11LF V8,11LF V8,11LF V8,11LF Crop Stage Scale 43.5 CM 87.5 CM 34 CM 34 CM 34 CM 34 CM 34 CM 123 CM 123 CM 123 CM 123 CM Pest Stage Majority 6LF, 4CM 4 LF,4CM 2LF 2CM 2LF, 1CM 5LF,10CM 20+,59CM 20+,40CM 12LF,19C 5LF,49CM Pest Density, Unit 21 M2 18 M2 4 M2 1 M2 38 M2 22 M2 21 M2 4 M2 2 M2 Trt-Eval Interval 14 DAE 28 DAE 28 DA-A 28 DA-A 28 DA-A 28 DA-A 28 DA-A 56 DA-A 56 DA-A 56 DA-A 56 DA-A Trt Treatment Rate Appl No. Name Rate Unit Code 1 2 3 4 5 6 7 8 9 10 11

1 Weedy control 0 a 0 a 0 d 0 b 0 b 0 c 0 c 0 d 0 c 0 c 0 c 2 Weed free control 0 a 0 a 100 a 100 a 100 a 100 a 100 a 100 a 100 a 100 a 100 a 3 dimethenamid-p 544 g ai/ha A 0 a 0 a 80 bc 100 a 90 a 84 ab 100 a 83 b 100 a 68 ab 58 ab 4 pethoxamid (CHA-2735) 840 g ai/ha A 0 a 0 a 83 abc 98 a 93 a 70 b 79 b 81 b 76 b 90 a 40 bc 5 pyroxasulfone 100 g ai/ha A 0 a 0 a 94 ab 100 a 100 a 89 ab 95 a 95 a 100 a 35 bc 55 ab 6 s-metolachlor 1050 g ai/ha A 0 a 0 a 70 c 98 a 88 a 80 ab 99 a 66 c 93 a 23 c 50 abc

LSD (P=.05) 0.0 0.0 18.8 4.5 15.2 26.5 8.7 8.6 11.7 37.3 52.2 Standard Deviation 0.0 0.0 12.4 3.0 10.1 17.6 5.8 5.7 7.8 24.7 34.6 CV 0.0 0.0 17.52 3.61 12.84 25.0 7.33 8.05 9.95 47.09 68.7

Pest Code SETVI CHEAL CHEAL AMARE AMARE POLPE POLPE POLCO POLCO SETVI SETVI Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Rating Date 4-7-16 4-7-16 4-7-16 4-7-16 4-7-16 4-7-16 4-7-16 4-7-16 4-7-16 4-7-16 4-7-16 7-10-16 Rating Type CONTROL DENSITY DRY WGT DENSITY DRY WGT DENSITY DRY WGT DENSITY DRY WGT DENSITY DRY WGT MOICON Rating Unit % PLNT/M2 G/M2 PLNT/M2 G/M2 PLNT/M2 G/M2 PLNT/M2 G/M2 PLNT/M2 G/M2 % Crop Stage Majority V8,11LF V8,11LF V8,11LF V8,11LF V8,11LF V8,11LF V8,11LF V8,11LF V8,11LF V8,11LF V8,11LF Crop Stage Scale 123 CM 123 CM 123 CM 123 CM 123 CM 123 CM 123 CM 123 CM 123 CM 123 CM 123 CM Pest Stage Majority 20+,41CM Pest Density, Unit 40 M2 Trt-Eval Interval 56 DA-A 56 DA-A 56 DA-A 56 DA-A 56 DA-A 56 DA-A 56 DA-A 56 DA-A 56 DA-A 56 DA-A 56 DA-A 153 DA-A Trt Treatment Rate Appl No. Name Rate Unit Code 12 13 14 15 16 17 18 19 20 21 22 24

1 Weedy control 0 c 18 a 53.32 a 15 a 22.45 a 0 ab 0.08 a 3 a 1.47 a 65 a 58.81 a 18.83 a 2 Weed free control 100 a 0 b 0.00 c 0 b 0.00 a 0 b 0.00 a 0 b 0.00 a 0 b 0.00 b 18.20 a 3 dimethenamid-p 544 g ai/ha A 100 a 1 b 7.17 bc 0 b 0.00 a 0 b 0.00 a 1 ab 0.06 a 0 b 0.00 b 18.34 a 4 pethoxamid (CHA-2735) 840 g ai/ha A 73 b 7 b 4.76 c 1 ab 3.18 a 1 ab 1.16 a 0 ab 0.01 a 6 b 2.29 b 18.18 a 5 pyroxasulfone 100 g ai/ha A 95 a 0 b 0.46 c 0 b 0.00 a 2 ab 1.54 a 2 ab 2.59 a 1 b 0.33 b 18.55 a 6 s-metolachlor 1050 g ai/ha A 97 a 4 b 38.22 ab 0 b 0.34 a 3 a 0.39 a 1 ab 0.40 a 2 b 1.57 b 18.21 a

LSD (P=.05) 8.3 10.3 33.402 14.0 25.334 2.7 2.261 3.1 2.625 15.5 10.286 0.685 Standard Deviation 5.5 6.9 22.167 9.3 16.813 1.8 1.500 2.0 1.742 10.3 6.826 0.454 CV 7.08 137.13 127.96 348.59 388.37 192.42 284.18 168.65 230.02 83.28 65.0 2.47

4

WEED MANAGEMENT IN CORN WITH GROUP 15 HERBICIDES APPLIED PREMERGENCE II

TODD COWAN, PETER SIKKEMA EXPERIMENT ID: FC16B1B Pest Code Crop Code ZEAMX ZEAMX Rating Date 7-10-16 7-10-16 Rating Type YIELD YIELD Rating Unit T/HA BU/AC Trt-Eval Interval 153 DA-A 153 DA-A Trt Treatment Rate Appl No. Name Rate Unit Code 25 26

1 Weedy control 7.42 c 118.1 c 2 Weed free control 11.77 ab 187.5 ab 3 dimethenamid-p 544 g ai/ha A 12.16 a 193.7 a 4 pethoxamid (CHA-2735) 840 g ai/ha A 11.07 b 176.3 b 5 pyroxasulfone 100 g ai/ha A 11.81 ab 188.1 ab 6 s-metolachlor 1050 g ai/ha A 11.52 ab 183.5 ab

LSD (P=.05) 0.966 15.40 Standard Deviation 0.641 10.22 CV 5.85 5.85

Conclusions: This experiment was established in corn to compare the weed control of efficacy of four Group 15 herbicides (dimethenamid-p, pethoxamid, pyroxasulfone and s-metolachlor) applied PRE. At 14 and 28 DAE, there was no corn injury from the Group 15 herbicides applied PRE. At 56 DAA, pyroxasulfone provided the best control of lamb’s-quarters, pethoxamid was the least efficacious on redroot pigweed and green foxtail, s-metolachlor was the least efficacious on lady’s thumb, and all four Group 15 herbicides provided equivalent control of wild buckwheat. Corn yield with the Group 15 herbicides evaluated was equivalent to the weed-free control.

5

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES FOLLOWING PREEMERGENCE HERBICIDES IN CORN I CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16B7A CROP: ZEAMX, FIELD CORN (RR & LL) (DKC 53-56). Planted: May-9-16, 78800 SEEDS/HA, 5 CM Deep, 75 CM Row Width. Planting Method: CONV. Emerged On: May-21-16. Expt. Design: RACOBL. Reps: 4. Plot Size: 2 m x 10 m. Expt. Location: RC - Range E7. Site Description: Soil Texture: SL. %OM: 3.2 %Sand: 56.8 %Silt: 23.6 %Clay: 19.6 pH: 6.6 CEC: 10.7. Application Description

A B Application Date: May-17-16 Jun-3-16 Time of Day: 10:55 9:20 Application Timing: PRE POST Air Temperature, Unit: 15.6 C 23.1 C % Relative Humidity: 66.3 58.2 Wind Velocity, Unit: 4.6 KPH 1.9 KPH Wind Direction: NE W Dew Presence (Y/N): N N Soil Temperature, Unit: 14.1 C 22.7 C Soil Moisture: MOIST DRY % Cloud Cover: 100 10


A B Crop 1 Code, BBCH Scale: ZEAMX C ZEAMX C Stage Scale Used: DESC DESC Stage Majority, Percent: NO EMERG V4 Stage Minimum, Percent: V3 Stage Maximum, Percent: V4 Height, Unit: 30 CM Height Minimum, Maximum: 20 33


A B Pest 1 Code, Type, Scale: ABUTH W ABUTH W Stage Majority, Percent: NOT EM COT Stage Minimum, Percent: COT Stage Maximum, Percent: 4 LF Height, Unit: 0.5 CM Height Minimum, Maximum: 0.5 3 Density, Unit: 2.5 /M2 Pest 2 Code, Type, Scale: AMBEL W AMBEL W Stage Majority, Percent: NOT EM 2 LF Stage Minimum, Percent: 2 LF Stage Maximum, Percent: 6 LF Height, Unit: 5 CM Height Minimum, Maximum: 2 10 Density, Unit: 14 /M2

Pest 3 Code, Type, Scale: CHEAL W CHEAL W Stage Majority, Percent: NOT EM 4 LF Stage Minimum, Percent: COT Stage Maximum, Percent: 6 LF Height, Unit: 3 CM Height Minimum, Maximum: 0.5 4 Density, Unit: 10 /M2 Pest 4 Code, Type, Scale: POLPE W POLPE W Stage Majority, Percent: NOT EM 1 LF Stage Minimum, Percent: COT Stage Maximum, Percent: 5 LF Height, Unit: 2 CM Height Minimum, Maximum: 0.5 4 Pest 5 Code, Type, Scale: SETVI W SETVI W Stage Majority, Percent: NOT EM 3 LF Stage Minimum, Percent: 2 LF Stage Maximum, Percent: 5 LF Height, Unit: 5 CM Height Minimum, Maximum: 3 10 Density, Unit: 24 /M2


A B Operating Pressure, Unit: 207 kPa 207 kPa Nozzle Type: LOW DRIFT LOW DRIFT Nozzle Size: ULD120-02 ULD120-02 Nozzle Spacing, Unit: 50 CM 50 CM Nozzles/Row: 4 4 Boom Length, Unit: 2 M 2 M Boom Height, Unit: 50 CM 50 CM Carrier: WATER WATER Spray Volume, Unit: 200 L/ha 200 L/ha Propellant: CO2 CO2

6

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES FOLLOWING PREEMERGENCE HERBICIDES IN CORN I CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16B7A

Pest Code ABUTH AMBEL CHEAL POLPE SETVI ABUTH AMBEL Crop Code ZEAMX ZEAMX Rating Date Jun-10-16 Jul-1-16 Jul-1-16 Jul-1-16 Jul-1-16 Jul-1-16 Jul-1-16 Jul-29-16 Jul-29-16 Rating Type INJURY INJURY CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL Rating Unit % % % % % % % % % Crop Stage Majority V5 V10 Crop Stage Minimum/Maximum V3 V6 V9 V10 Crop Stage Scale 25-65 CM 1.2-1.5M Pest Stage Majority 4-5 LF 20+LF 20+L-BUD 14-20+LF 2-4 TIL 5L-FLWR 20+L-BUD Pest Stage Minimum/Maximum 23-35 CM 31-52 CM 49-73 CM 23-37 CM 38-69 CM 42-105 CM 62-115 CM Pest Density, Unit 6.5 /M2 7.5 /M2 16 /M2 6 /M2 27 /M2 4 /M2 30 /M2 Trt-Eval Interval 7 DA-B 28 DA-B 28 DA-B 28 DA-B 28 DA-B 28 DA-B 28 DA-B 56 DA-B 56 DA-B Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 1 2 3 4 5 6 7 8 9

1 Weedy control 0 a 0 a 0 c 0 c 0 e 0 c 0 c 0 c 0 c 2 s-metolachlor/atrazine 720 SC 2880 g AI/ha A 0 a 0 a 95 b 100 b 99 bcd 100 a 99 a 92 b 99 b glyphosate (Weathermax) 540 SL 900 g AI/ha B

3 s-metolachlor/atrazine 720 SC 2880 g AI/ha A 0 a 0 a 96 b 100 ab 99 abc 100 a 99 a 94 b 100 ab glyphosate (Weathermax) 540 SL 900 g AI/ha B Crop Booster 2.0 1000 SL 2.00 L/ha B

4 s-metolachlor/atrazine 720 SC 2880 g AI/ha A 0 a 0 a 95 b 100 a 99 abc 100 a 99 ab 93 b 100 ab glyphosate (Weathermax) 540 SL 900 g AI/ha B AX-15-10 1000 SL 2.00 L/ha B

5 s-meto/mesotrione/atrazine 440 SC 2065 g AI/ha A 0 a 0 a 99 a 100 a 100 a 100 ab 99 a 99 a 100 a glyphosate (Weathermax) 540 SL 900 g AI/ha B

6 s-meto/mesotrione/atrazine 440 SC 2065 g AI/ha A 0 a 0 a 99 a 100 a 99 cd 100 a 99 a 99 a 100 ab glyphosate (Weathermax) 540 SL 900 g AI/ha B Crop Booster 2.0 1000 SL 2.00 L/ha B

7 s-meto/mesotrione/atrazine 440 SC 2065 g AI/ha A 0 a 0 a 99 a 100 ab 99 abc 100 ab 99 a 99 a 100 ab glyphosate (Weathermax) 540 SL 900 g AI/ha B AX-15-10 1000 SL 2.00 L/ha B

8 saflufenacil/dimethenamid-p 668 EC 735 g AI/ha A 0 a 0 a 99 a 100 ab 99 cd 100 ab 99 b 98 a 100 ab glyphosate (Weathermax) 540 SL 900 g AI/ha B

9 saflufenacil/dimethenamid-p 668 EC 735 g AI/ha A 0 a 0 a 99 a 100 ab 98 d 100 ab 99 ab 99 a 100 ab glyphosate (Weathermax) 540 SL 900 g AI/ha B Crop Booster 2.0 1000 SL 2.00 L/ha B

10 saflufenacil/dimethenamid-p 668 EC 735 g AI/ha A 0 a 0 a 99 a 100 a 98 d 100 b 99 a 98 a 100 ab glyphosate (Weathermax) 540 SL 900 g AI/ha B AX-15-10 1000 SL 2.00 L/ha B

11 isoxaflutole/cyprosulfamide 480 EC 210 g AI/ha A 0 a 0 a 99 a 100 a 100 ab 100 a 99 a 99 a 100 a atrazine 480 SC 1063 g AI/ha A glyphosate (Weathermax) 540 SL 900 g AI/ha B

12 isoxaflutole/cyprosulfamide 480 EC 210 g AI/ha A 0 a 0 a 99 a 100 a 99 cd 100 ab 99 a 99 a 100 ab atrazine 480 SC 1063 g AI/ha A glyphosate (Weathermax) 540 SL 900 g AI/ha B Crop Booster 2.0 1000 SL 2.00 L/ha B

13 isoxaflutole/cyprosulfamide 480 EC 210 g AI/ha A 0 a 0 a 100 a 100 a 100 ab 100 a 99 a 100 a 100 a atrazine 480 SC 1063 g AI/ha A glyphosate (Weathermax) 540 SL 900 g AI/ha B AX-15-10 1000 SL 2.00 L/ha B

LSD (P=.05) 0.0 0.0 1.6 0.4 0.8 0.5 0.5 2.3 0.5 Standard Deviation 0.0 0.0 1.1 0.3 0.6 0.3 0.3 1.6 0.4 CV 0.0 0.0 1.2 0.33 0.64 0.37 0.35 1.81 0.38

7

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES FOLLOWING PREEMERGENCE HERBICIDES IN CORN I CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16B7A Pest Code CHEAL POLPE SETVI Crop Code ZEAMX ZEAMX Rating Date Jul-29-16 Jul-29-16 Jul-29-16 Oct-18-16 Oct-18-16 Rating Type CONTROL CONTROL CONTROL YIELD YIELD Rating Unit % % % T/HA BU/AC Pest Stage Majority BUD-FLWR FLWR 6L-FLWR Pest Stage Minimum/Maximum 1.4-2.2M 1.0-1.3M 62-139 CM Pest Density, Unit 14 /M2 4.5 /M2 39 /M2 Trt-Eval Interval 56 DA-B 56 DA-B 56 DA-B 137 DA-B 137 DA-B Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 10 11 12 15 16

1 Weedy control 0 f 0 b 0 c 4.99 b 79.5 b 2 s-metolachlor/atrazine 720 SC 2880 g AI/ha A 99 cde 100 a 99 a 11.58 a 184.5 a glyphosate (Weathermax) 540 SL 900 g AI/ha B

3 s-metolachlor/atrazine 720 SC 2880 g AI/ha A 99 de 99 a 99 ab 12.03 a 191.7 a glyphosate (Weathermax) 540 SL 900 g AI/ha B Crop Booster 2.0 1000 SL 2.00 L/ha B

4 s-metolachlor/atrazine 720 SC 2880 g AI/ha A 99 bcd 100 a 99 ab 12.14 a 193.5 a glyphosate (Weathermax) 540 SL 900 g AI/ha B AX-15-10 1000 SL 2.00 L/ha B

5 s-meto/mesotrione/atrazine 440 SC 2065 g AI/ha A 100 a 100 a 99 a 11.89 a 189.5 a glyphosate (Weathermax) 540 SL 900 g AI/ha B

6 s-meto/mesotrione/atrazine 440 SC 2065 g AI/ha A 99 cde 100 a 99 a 12.55 a 200.0 a glyphosate (Weathermax) 540 SL 900 g AI/ha B Crop Booster 2.0 1000 SL 2.00 L/ha B

7 s-meto/mesotrione/atrazine 440 SC 2065 g AI/ha A 99 abc 100 a 99 a 12.70 a 202.4 a glyphosate (Weathermax) 540 SL 900 g AI/ha B AX-15-10 1000 SL 2.00 L/ha B

8 saflufenacil/dimethenamid-p 668 EC 735 g AI/ha A 99 de 100 a 99 b 11.98 a 190.8 a glyphosate (Weathermax) 540 SL 900 g AI/ha B

9 saflufenacil/dimethenamid-p 668 EC 735 g AI/ha A 99 bcd 100 a 99 a 12.49 a 198.9 a glyphosate (Weathermax) 540 SL 900 g AI/ha B Crop Booster 2.0 1000 SL 2.00 L/ha B

10 saflufenacil/dimethenamid-p 668 EC 735 g AI/ha A 98 e 100 a 99 a 11.95 a 190.5 a glyphosate (Weathermax) 540 SL 900 g AI/ha B AX-15-10 1000 SL 2.00 L/ha B

11 isoxaflutole/cyprosulfamide 480 EC 210 g AI/ha A 100 a 100 a 99 a 12.61 a 200.9 a atrazine 480 SC 1063 g AI/ha A glyphosate (Weathermax) 540 SL 900 g AI/ha B

12 isoxaflutole/cyprosulfamide 480 EC 210 g AI/ha A 99 bcd 100 a 99 a 12.79 a 203.8 a atrazine 480 SC 1063 g AI/ha A glyphosate (Weathermax) 540 SL 900 g AI/ha B Crop Booster 2.0 1000 SL 2.00 L/ha B

13 isoxaflutole/cyprosulfamide 480 EC 210 g AI/ha A 100 ab 100 a 99 a 12.70 a 202.3 a atrazine 480 SC 1063 g AI/ha A glyphosate (Weathermax) 540 SL 900 g AI/ha B AX-15-10 1000 SL 2.00 L/ha B

LSD (P=.05) 0.7 0.5 0.3 1.358 21.64 Standard Deviation 0.5 0.4 0.2 0.950 15.14 CV 0.55 0.38 0.26 8.11 8.11

Conclusions: This experiment was established to determine the effect of adding a biostimulant (Crop Booster 2.0 or AX15-10) to glyphosate applied POST following PRE herbicide in corn. At 7 and 28 DAB, there was no visible crop injury in corn from the herbicide treatments evaluated. At 56 DAB, s-metolachlor/atrazine (2880 g/ha) applied PRE followed by glyphosate (900 g/ha) applied POST provided 92, 99, 99, 100 and 99% control of velvetleaf, common ragweed, lamb’s-quarters, lady’s thumb and green foxtail, respectively. The addition of either Crop Booster 2.0 or AX 15-10 did not affect the level of weed control. At 56 DAB, s-metolachlor/mesotrione/atrazine (2065 g/ha) applied PRE followed by glyphosate (900 g/ha) applied POST provided 99, 100, 100, 100 and 99% control of velvetleaf, common ragweed, lamb’s-quarters, lady’s thumb and green foxtail, respectively. The addition of either Crop Booster 2.0 or AX 15-10 did not affect the level of weed control. At 56 DAB saflufenacil/dimethenamid-p (735 g/ha) applied PRE followed by glyphosate (900 g/ha) applied POST provided 98, 100, 99, 100 and 99% control of velvetleaf, common ragweed, lamb’s-quarters, lady’s thumb and green foxtail, respectively. The addition of either Crop Booster 2.0 or AX 15-10 did not affect the level of weed control. At 56 DAB, isoxaflutole/cyprosulfamide + atrazine (210 + 1063 g/ha) applied PRE followed by glyphosate (900 g/ha) applied POST provided 99, 100, 100, 100 and 99% control of velvetleaf, common ragweed, lamb’s-quarters, lady’s thumb and green foxtail, respectively. The addition of either Crop Booster 2.0 or AX 15-10 did not affect the level of weed control. There was no impact of the biostimulants evaluated on corn yield.

8

EFFECT OF BIOSTIMULANTS ADDED TO POSTEMERGENCE HERBICIDES FOLLOWING PREEMERGENCE HERBICIDES IN CORN II

TODD COWAN, PETER SIKKEMA EXPERIMENT ID: FC16B7B CROP: ZEAMX, Corn (DKC 42-42 RIB). Planted: 9-5-16, 82000. S/H, 4 CM Deep, 75 CM Row Width. Planting Method: PLANTD. Emerged On: 24-5-16. FIELD Site. Expt. Design: RACOBL. Reps: 4. Plot Size: 2 m x 11 m. Expt. Location: HRS - Range N3. Site Description: Soil Texture: CL. %OM: 3 %Sand: 17 %Silt: 46 %Clay: 37 pH: 7.7 CEC: 35.2. Application Description

A B Application Date: 16-5-16 3-6-16 Time of Day: 7:05 AM 6:56 AM Application Method: CO2 SPRAY CO2 SPRAY Application Timing: PRE POST Application Placement: SOIL FOLIAR Applied By: TC TC Air Temperature, Unit: 6.1 C 17.2 C % Relative Humidity: 61.9 66.6 Wind Velocity, Unit: 5.2 KPH 4.1 KPH Wind Direction: SW E Dew Presence (Y/N): N no Y yes Soil Temperature, Unit: 6.3 C 18.9 C Soil Moisture: SB-M SF-M SB-D SF-D % Cloud Cover: 70 0


A B Crop 1 Code, BBCH Scale: ZEAMX BCOR ZEAMX BCOR Stage Scale Used: BBCH BBCH Stage Majority, Percent: NO EMER V3, 5LF Stage Minimum, Percent: V2, 3LF Stage Maximum, Percent: V4, 5LF Height, Unit: 30 CM Height Minimum, Maximum: 10 33


A B Pest 1 Code, Type, Scale: CHEAL W CHEAL W Stage Majority, Percent: NO EM 4 LF Stage Minimum, Percent: 4 LF Stage Maximum, Percent: 6 LF Height, Unit: 2 CM Height Minimum, Maximum: 1 7 Density, Unit: 2 M2 Pest 2 Code, Type, Scale: SINAR W SINAR W

Stage Majority, Percent: NO EM 3LF Stage Minimum, Percent: COT Stage Maximum, Percent: 5 LF Height, Unit: 3 CM Height Minimum, Maximum: 0.5 6 Density, Unit: 3 M2 Pest 3 Code, Type, Scale: AMBEL W AMBEL W Stage Majority, Percent: NO EM 2 LF Stage Minimum, Percent: 2 LF Stage Maximum, Percent: 4 LF Height, Unit: 3 CM Height Minimum, Maximum: 1 4 Density, Unit: 2 M2 Pest 4 Code, Type, Scale: SETVI W SETVI W Stage Majority, Percent: NO EM 4 LF Stage Minimum, Percent: 1 LF Stage Maximum, Percent: 5 LF Height, Unit: 3 CM Height Minimum, Maximum: 1 5 Density, Unit: 60 M2


A B Appl. Equipment: CO2 SPRAYER CO2 SPRAYER Equipment Type: BACSPR BACSPR Operation Pressure, Unit: 241 kPa 241 kPa Nozzle Type: LOW DRIFT LOW DRIFT Nozzle Size: ULD 12002 ULD 12002 Nozzle Spacing, Unit: 50 CM 50 CM Boom Length, Unit: 2 M 2 M Boom Height, Unit: 50 CM 50 CM Carrier: WATER WATER Spray Volume, Unit: 200 L/ha 200 L/ha Mix Size, Unit: 1.76 liters 1.76 liters Propellant: CO2 CO2

Pest Code CHEAL SINAR AMBEL SETVI CHEAL SINAR AMBEL SETVI Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Rating Date 10-6-16 30-6-16 30-6-16 30-6-16 30-6-16 30-6-16 27-7-16 27-7-16 27-7-16 27-7-16 7-10-16 Rating Type INJURY INJURY CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL MOICON Rating Unit % % % % % % % % % % % Crop Stage Majority V5, 6 LF V7,10LF V7,10LF V7,10LF V7,10LF V7,10LF R2,16LF R2,16LF R2,16LF R2,16LF Crop Stage Scale 41 CM 117 CM 117 CM 117 CM 117 CM 117 CM 229CM 229CM 229CM 229CM Pest Stage Majority 20+,35CM 16LF,85C 20+,16LF 20+,34CM 20+,139C 0LF,75CM 20+,93CM 20+,61CM Pest Density, Unit 3 M2 3 M2 1 M2 95 M2 3 M2 2 M2 2 M2 56 M2 Trt-Eval Interval 7 DA-A 28 DA-B 28 DA-B 28 DA-B 28 DA-B 28 DA-B 56 DA-B 56 DA-B 56 DA-B 56 DA-B 126 DA-B Trt Treatment Rate Appl No. Name Rate Unit Code 1 2 3 4 5 6 7 8 9 10 12

1 Weedy control 0 a 0 a 0 b 0 b 0 b 0 c 0 c 0 b 0 b 0 d 19.2 ab 2 s-metolachlor/atrazine 2880 g ai/ha A 0 a 0 a 100 a 100 a 100 a 100 a 100 a 100 a 100 a 99 a 19.2 ab glyphosate (Weathermax) 900 g ai/ha B

3 s-metolachlor/atrazine 2880 g ai/ha A 0 a 0 a 100 a 100 a 100 a 98 ab 100 a 100 a 100 a 99 ab 20.2 a glyphosate (Weathermax) 900 g ai/ha B Crop Booster 2.0 2.00 l/ha B

4 s-metolachlor/atrazine 2880 g ai/ha A 0 a 0 a 100 a 100 a 100 a 98 ab 100 a 100 a 100 a 97 bc 19.6 ab glyphosate (Weathermax) 900 g ai/ha B AX-15-10 2.00 l/ha B

5 s-meto/mesotrione/atrazine 2065 g ai/ha A 0 a 0 a 100 a 100 a 100 a 99 ab 100 a 100 a 100 a 97 abc 19.6 ab glyphosate (Weathermax) 900 g ai/ha B

6 s-meto/mesotrione/atrazine 2065 g ai/ha A 0 a 0 a 100 a 100 a 100 a 98 ab 100 a 100 a 100 a 97 abc 18.9 b glyphosate (Weathermax) 900 g ai/ha B Crop Booster 2.0 2.00 l/ha B

7 s-meto/mesotrione/atrazine 2065 g ai/ha A 0 a 0 a 100 a 100 a 100 a 98 ab 100 a 100 a 100 a 97 bc 19.0 ab glyphosate (Weathermax) 900 g ai/ha B AX-15-10 2.00 l/ha B

8 saflufenacil/dimethenamid-p 735 g ai/ha A 0 a 0 a 100 a 100 a 100 a 97 b 100 a 100 a 100 a 97 abc 19.3 ab glyphosate (Weathermax) 900 g ai/ha B

9 saflufenacil/dimethenamid-p 735 g ai/ha A 0 a 0 a 100 a 100 a 100 a 98 ab 99 b 100 a 100 a 97 bc 19.7 ab glyphosate (Weathermax) 900 g ai/ha B Crop Booster 2.0 2.00 l/ha B

9


TODD COWAN, PETER SIKKEMA EXPERIMENT ID: FC16B7B

CHEAL SINAR AMBEL SETVI CHEAL SINAR AMBEL SETVI

Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Rating Date 10-6-16 30-6-16 30-6-16 30-6-16 30-6-16 30-6-16 27-7-16 27-7-16 27-7-16 27-7-16 7-10-16 Rating Type INJURY INJURY CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL MOICON Rating Unit % % % % % % % % % % % Crop Stage Majority V5, 6 LF V7,10LF V7,10LF V7,10LF V7,10LF V7,10LF R2,16LF R2,16LF R2,16LF R2,16LF Crop Stage Scale 41 CM 117 CM 117 CM 117 CM 117 CM 117 CM 229CM 229CM 229CM 229CM Pest Stage Majority 20+,35CM 16LF,85C 20+,16LF 20+,34CM 20+,139C 0LF,75CM 20+,93CM 20+,61CM Pest Density, Unit 3 M2 3 M2 1 M2 95 M2 3 M2 2 M2 2 M2 56 M2 Trt-Eval Interval 7 DA-A 28 DA-B 28 DA-B 28 DA-B 28 DA-B 28 DA-B 56 DA-B 56 DA-B 56 DA-B 56 DA-B 126 DA-B Trt Treatment Rate Appl No. Name Rate Unit Code 1 2 3 4 5 6 7 8 9 10 12 10 saflufenacil/dimethenamid-p 735 g ai/ha A 0 a 0 a 100 a 100 a 100 a 97 b 100 a 100 a 100 a 95 c 19.3 ab

glyphosate (Weathermax) 900 g ai/ha B AX-15-10 2.00 l/ha B

11 isoxaflutole/cyprosulfamide 210 g ai/ha A 0 a 0 a 100 a 100 a 100 a 100 a 100 a 100 a 100 a 99 a 19.5 ab atrazine 1063 g ai/ha A glyphosate (Weathermax) 900 g ai/ha B

12 isoxaflutole/cyprosulfamide 210 g ai/ha A 0 a 0 a 100 a 100 a 100 a 99 ab 100 a 100 a 100 a 99 a 19.6 ab atrazine 1063 g ai/ha A glyphosate (Weathermax) 900 g ai/ha B Crop Booster 2.0 2.00 l/ha B

13 isoxaflutole/cyprosulfamide 210 g ai/ha A 0 a 0 a 100 a 100 a 100 a 100 a 100 a 100 a 100 a 99 a 19.9 ab atrazine 1063 g ai/ha A glyphosate (Weathermax) 900 g ai/ha B AX-15-10 2.00 l/ha B

LSD (P=.05) 0.0 0.0 0.0 0.0 0.0 2.3 0.6 0.0 0.0 2.3 1.16 Standard Deviation 0.0 0.0 0.0 0.0 0.0 1.6 0.4 0.0 0.0 1.6 0.81 CV 0.0 0.0 0.0 0.0 0.0 1.8 0.45 0.0 0.0 1.79 4.18

Pest Code Crop Code ZEAMX ZEAMX Rating Date 7-10-16 7-10-16 Rating Type YIELD YIELD Rating Unit T/HA BU/AC Trt-Eval Interval 126 DA-B 126 DA-B Trt Treatment Rate Appl No. Name Rate Unit Code 13 14

1 Weedy control 10.32 b 164.4 b 2 s-metolachlor/atrazine 2880 g ai/ha A 13.92 a 221.7 a glyphosate (Weathermax) 900 g ai/ha B

3 s-metolachlor/atrazine 2880 g ai/ha A 13.63 a 217.1 a glyphosate (Weathermax) 900 g ai/ha B Crop Booster 2.0 2.00 l/ha B

4 s-metolachlor/atrazine 2880 g ai/ha A 13.47 a 214.7 a glyphosate (Weathermax) 900 g ai/ha B AX-15-10 2.00 l/ha B

5 s-meto/mesotrione/atrazine 2065 g ai/ha A 13.43 a 214.0 a glyphosate (Weathermax) 900 g ai/ha B

6 s-meto/mesotrione/atrazine 2065 g ai/ha A 13.37 a 213.1 a glyphosate (Weathermax) 900 g ai/ha B Crop Booster 2.0 2.00 l/ha B

7 s-meto/mesotrione/atrazine 2065 g ai/ha A 13.91 a 221.6 a glyphosate (Weathermax) 900 g ai/ha B AX-15-10 2.00 l/ha B

8 saflufenacil/dimethenamid-p 735 g ai/ha A 12.94 a 206.2 a glyphosate (Weathermax) 900 g ai/ha B

9 saflufenacil/dimethenamid-p 735 g ai/ha A 12.10 ab 192.8 ab glyphosate (Weathermax) 900 g ai/ha B Crop Booster 2.0 2.00 l/ha B

10 saflufenacil/dimethenamid-p 735 g ai/ha A 13.87 a 221.0 a glyphosate (Weathermax) 900 g ai/ha B AX-15-10 2.00 l/ha B

11 isoxaflutole/cyprosulfamide 210 g ai/ha A 14.01 a 223.2 a atrazine 1063 g ai/ha A glyphosate (Weathermax) 900 g ai/ha B

12 isoxaflutole/cyprosulfamide 210 g ai/ha A 13.09 a 208.6 a atrazine 1063 g ai/ha A glyphosate (Weathermax) 900 g ai/ha B Crop Booster 2.0 2.00 l/ha B

10


TODD COWAN, PETER SIKKEMA EXPERIMENT ID: FC16B7B

Pest Code Crop Code ZEAMX ZEAMX Rating Date 7-10-16 7-10-16 Rating Type YIELD YIELD Rating Unit T/HA BU/AC Trt-Eval Interval 126 DA-B 126 DA-B Trt Treatment Rate Appl No. Name Rate Unit Code 13 14 13 isoxaflutole/cyprosulfamide 210 g ai/ha A 12.72 ab 202.7 ab

atrazine 1063 g ai/ha A glyphosate (Weathermax) 900 g ai/ha B AX-15-10 2.00 l/ha B

LSD (P=.05) 2.552 40.66 Standard Deviation 1.767 28.16 CV 13.45 13.45

Conclusions: This experiment was established to determine the effect of adding a bio stimulant (Crop Booster 2.0 or AX15-10) to glyphosate applied POST following PRE herbicide in corn. At 7 and 28 DAB, there was no visible crop injury in corn from the herbicide treatments evaluated. At 56 DAB, s-metolachlor/atrazine (2880 g/ha) applied PRE followed by glyphosate (900 g/ha) applied POST provided 100, 100, 100 and 99% control of lamb’s-quarters, wild mustard, common ragweed and green foxtail, respectively. The addition of either Crop Booster 2.0 or AX 15-10 did not appreciably affect the level of weed control (≤ 2%). At 56 DAB, s-metolachlor/mesotrione/atrazine (2065 g/ha) applied PRE followed by glyphosate (900 g/ha) applied POST provided 100, 100, 100 and 97% control of lamb’s-quarters, wild mustard, common ragweed and green foxtail, respectively. The addition of either Crop Booster 2.0 or AX 15-10 did not affect the level of weed control. At 56 DAB saflufenacil/dimethenamid-p (735 g/ha) applied PRE followed by glyphosate (900 g/ha) applied POST provided 100, 100, 100 and 97% control of lamb’s-quarters, wild mustard, common ragweed and green foxtail, respectively. The addition of either Crop Booster 2.0 or AX 15-10 did not appreciably affect the level of weed control (≤ 2%). At 56 DAB, isoxaflutole/cyprosulfamide + atrazine (210 + 1063 g/ha) applied PRE followed by glyphosate (900 g/ha) applied POST provided 100, 100, 100 and 99% control of lamb’s-quarters, wild mustard, common ragweed and green foxtail, respectively. The addition of either Crop Booster 2.0 or AX 15-10 did not affect the level of weed control. There was no impact of the biostimulants evaluated on corn yield.

11

WEED CONTROL IN CORN WITH SYNGENTA HERBICIDES CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16B8 CROP: ZEAMX, FIELD CORN (RR & LL) (DKC 53-56). Planted: May-11-16, 78800 SEEDS/HA, 5 CM Deep, 75 CM Row Width. Planting Method: CONV. Emerged On: May-24-16. Expt. Design: RACOBL. Reps: 4. Plot Size: 2 m x 10 m. Expt. Location: RC - Range H3. Site Description: Soil Texture: CL. %OM: 4.1 %Sand: 26.0 %Silt: 36.0 %Clay: 38.0 pH: 7.3 CEC: 21.1. Application Description

A B Application Date: May-17-16 May-30-16 Time of Day: 9:25 17:30 Application Timing: PRE POST Air Temperature, Unit: 13.6 C 29.3 C % Relative Humidity: 72.8 40.6 Wind Velocity, Unit: 3.9 KPH 3.5 KPH Wind Direction: N W Dew Presence (Y/N): Y N Soil Temperature, Unit: 12.1 C 27.2 C Soil Moisture: MOIST DRY % Cloud Cover: 100 35


A B Crop 1 Code, BBCH Scale: ZEAMX C ZEAMX C Stage Scale Used: DESC DESC Stage Majority, Percent: NOT EM V2 Stage Minimum, Percent: V1 Stage Maximum, Percent: V2 Height, Unit: 20 CM Height Minimum, Maximum: 15 23


A B Pest 1 Code, Type, Scale: ABUTH W ABUTH W Stage Majority, Percent: NOT EM COT Stage Minimum, Percent: COT Stage Maximum, Percent: 2 LF Height, Unit: 0.5 CM Height Minimum, Maximum: 0.5 2 Density, Unit: 5 /M2 Pest 2 Code, Type, Scale: AMAPO W AMAPO W Stage Majority, Percent: NOT EM NOT EM

Pest 3 Code, Type, Scale: AMBEL W AMBEL W Stage Majority, Percent: NOT EM 2 LF Stage Minimum, Percent: COT Stage Maximum, Percent: 4 LF Height, Unit: 1 CM Height Minimum, Maximum: 0.5 2 Density, Unit: 4 /M2 Pest 4 Code, Type, Scale: CHEAL W CHEAL W Stage Majority, Percent: NOT EM 2-4 LF Stage Minimum, Percent: COT Stage Maximum, Percent: 6 LF Height, Unit: 2 CM Height Minimum, Maximum: 0.5 5 Pest 5 Code, Type, Scale: SETVI W SETVI W Stage Majority, Percent: NOT EM 3 LF Stage Minimum, Percent: 1 LF Stage Maximum, Percent: 3 LF Height, Unit: 3 CM Height Minimum, Maximum: 2 3 Density, Unit: 7 /M2


A B

Operating Pressure, Unit: 207 kPa 207 kPa

Nozzle Type: LOW DRIFT LOW DRIFT Nozzle Size: ULD120-02 ULD120-02 Nozzle Spacing, Unit: 50 CM 50 CM Nozzles/Row: 4 4 Boom Length, Unit: 2 M 2 M Boom Height, Unit: 50 CM 50 CM Carrier: WATER WATER Spray Volume, Unit: 200 L/ha 200 L/ha Propellant: CO2 CO2

Pest Code ABUTH AMAPO AMBEL CHEAL SETVI ABUTH Crop Code ZEAMX ZEAMX Rating Date Jun-13-16 Jul-19-16 Jun-13-16 Jun-13-16 Jun-13-16 Jun-13-16 Jun-13-16 Jul-19-16 Rating Type INJURY INJURY CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL Rating Unit % % % % % % % % Crop Stage Majority V5 VT Crop Stage Minimum/Maximum V4 V6 V12 VT Crop Stage Scale 50-62 CM 1.5-2.5M Pest Stage Majority C-6 LF 4-7 LF 2-8 LF 10-20+LF 3L-2TIL 4L-FLWR Pest Stage Minimum/Maximum 1-6 CM 3-9 CM 5-9 CM 8-16 CM 4-16 CM 24-82 CM Pest Density, Unit 20 /M2 3 /M2 10 /M2 18 /M2 47 /M2 10 /M2 Trt-Eval Interval 14 DA-B 50 DA-B 14 DA-B 14 DA-B 14 DA-B 14 DA-B 14 DA-B 50 DA-B Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 1 2 3 4 5 6 7 8

1 Weedy control 0 a 0 a 0 c 0 d 0 d 0 d 0 b 0 e 2 glyphosate 540 SL 900 g AI/ha A 0 a 0 a 84 b 97 b 31 c 46 b 0 b 92 d s-metolachlor/mesotrione/atrazine 440 SC 2065 g AI/ha A

3 glyphosate 540 SL 900 g AI/ha A 0 a 0 a 85 b 94 c 40 bc 38 bc 0 b 95 bc s-metolachlor/mesotrione/bicyclopyrone 390 SC 1575 g AI/ha A

4 glyphosate 540 SL 900 g AI/ha A 0 a 0 a 81 b 96 bc 45 b 31 c 0 b 94 cd s-metolachlor/mesotrione/bicyclopyrone/atrazi 412 SC 2022 g AI/ha A

5 glyphosate 540 SL 900 g AI/ha B 0 a 0 a 99 a 100 a 100 a 100 a 99 a 99 a s-metolachlor/mesotrione/atrazine 440 SC 1475 g AI/ha B

6 glyphosate 540 SL 900 g AI/ha B 0 a 0 a 99 a 100 a 100 a 100 a 99 a 99 a s-metolachlor/mesotrione/bicyclopyrone 390 SC 1575 g AI/ha B

7 glyphosate 540 SL 900 g AI/ha B 0 a 0 a 99 a 100 a 100 a 100 a 99 a 98 a s-metolachlor/mesotrione/bicyclopyrone/atrazi 412 SC 2022 g AI/ha B

8 glyphosate/s-metolachlor/mesotrione 525 SC 2205 g AI/ha B 0 a 0 a 99 a 100 a 100 a 100 a 99 a 97 ab atrazine 480 SC 280 g AI/ha B Agral 90 1000 SL 0.200 % V/V B

9 glyphosate/s-metolachlor/mesotrione 525 SC 2205 g AI/ha B 0 a 0 a 99 a 100 a 100 a 100 a 99 a 98 a bicyclopyrone 200 SL 50 g AI/ha B Agral 90 1000 SL 0.200 % V/V B

LSD (P=.05) 0.0 0.0 6.3 2.3 9.3 12.0 0.4 2.4 Standard Deviation 0.0 0.0 4.3 1.6 6.4 8.2 0.2 1.6 CV 0.0 0.0 5.2 1.84 9.34 12.02 0.44 1.91

12

WEED CONTROL IN CORN WITH SYNGENTA HERBICIDES CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16B8 Pest Code AMAPO AMBEL CHEAL SETVI Crop Code ZEAMX ZEAMX Rating Date Jul-19-16 Jul-19-16 Jul-19-16 Jul-19-16 Oct-17-16 Oct-17-16 Rating Type CONTROL CONTROL CONTROL CONTROL YIELD YIELD Rating Unit % % % % T/HA BU/AC Pest Stage Majority 20+L-BUD 20+L-BUD BUD 8L-FLWR Pest Stage Minimum/Maximum 53-107 CM 42-111 CM 117-199CM 75-96 CM Pest Density, Unit 3 /M2 13 /M2 36 /M2 42 /M2 Trt-Eval Interval 50 DA-B 50 DA-B 50 DA-B 50 DA-B 140 DA-B 140 DA-B Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 9 10 11 12 15 16

1 Weedy control 0 d 0 d 0 c 0 b 5.66 c 90.2 c 2 glyphosate 540 SL 900 g AI/ha A 98 bc 33 c 43 b 0 b 7.36 b 117.3 b s-metolachlor/mesotrione/atrazine 440 SC 2065 g AI/ha A

3 glyphosate 540 SL 900 g AI/ha A 97 c 43 c 36 b 0 b 8.36 b 133.2 b s-metolachlor/mesotrione/bicyclopyrone 390 SC 1575 g AI/ha A

4 glyphosate 540 SL 900 g AI/ha A 99 ab 74 b 36 b 0 b 7.83 b 124.7 b s-metolachlor/mesotrione/bicyclopyrone/atrazi 412 SC 2022 g AI/ha A

5 glyphosate 540 SL 900 g AI/ha B 100 a 100 a 100 a 97 a 11.27 a 179.6 a s-metolachlor/mesotrione/atrazine 440 SC 1475 g AI/ha B

6 glyphosate 540 SL 900 g AI/ha B 100 a 100 a 100 a 98 a 11.48 a 182.9 a s-metolachlor/mesotrione/bicyclopyrone 390 SC 1575 g AI/ha B

7 glyphosate 540 SL 900 g AI/ha B 100 a 100 a 99 a 98 a 11.98 a 190.8 a s-metolachlor/mesotrione/bicyclopyrone/atrazi 412 SC 2022 g AI/ha B

8 glyphosate/s-metolachlor/mesotrione 525 SC 2205 g AI/ha B 100 a 100 a 100 a 97 a 11.70 a 186.4 a atrazine 480 SC 280 g AI/ha B Agral 90 1000 SL 0.200 % V/V B

9 glyphosate/s-metolachlor/mesotrione 525 SC 2205 g AI/ha B 100 a 100 a 100 a 97 a 11.97 a 190.7 a bicyclopyrone 200 SL 50 g AI/ha B Agral 90 1000 SL 0.200 % V/V B

LSD (P=.05) 1.7 10.1 12.0 0.8 1.064 16.95 Standard Deviation 1.1 6.9 8.2 0.5 0.729 11.61 CV 1.3 9.63 12.11 0.96 7.49 7.49

Conclusions: This experiment was established to determine the efficacy of various Syngenta herbicides applied PRE and ePOST in corn. The PRE herbicides were applied on May 17 with 25.4 mm of rainfall in the next 29 days which fell in 4 rain events. This influenced the weed control with the PRE herbicides. The PRE and ePOST herbicides evaluated did not cause any visible injury in corn evaluated 14 and 50 days after the ePOST application. At 50 DAB, s-metolachlor/mesotrione/atrazine and s-metolachlor/mesotrione/bicyclopyrone applied PRE provided excellent control of velvetleaf and green pigweed and poor control of common ragweed, lamb’s-quarters and green foxtail. The control of common ragweed was improved with the PRE application of s-metolachlor/mesotrione/bicyclopyrone/atrazine. At 50 DAB, the tankmix of glyphosate plus s-metolachlor/mesotrione/atrazine, s-metolachlor/mesotrione/bicyclopyrone or s-metolachlor/mesotrione/bicyclopyrone/atrazine and the tankmixes of glyphosate/s-metolachlor/mesotrione plus atrazine and glyphosate/s-metolachlor/mesotrione plus bicyclopyrone applied ePOST all provided excellent full season control of velvetleaf, green pigweed, common ragweed, lamb’s-quarters and green foxtail. Corn yield was greater with the ePOST herbicide treatments evaluated.

13

EFFECT OF GLYPHOSATE PLUS FUNGICIDE APPLIED AT V4-V6 ON CROP INJURY, WEED CONTROL, DISEASE CONTROL AND CORN YIELD I CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16C2A CROP: ZEAMX, FIELD CORN (RR & LL) (DKC 53-56). Planted: May-9-16, 78800 SEEDS/HA, 5 CM Deep, 75 CM Row Width. Planting Method: CONV. Emerged On: May-21-16. Expt. Design: RACOBL. Reps: 3. Plot Size: 2 m x 10 m. Expt. Location: RC - Range J3-C. Site Description: Soil Texture: L. %OM: 4.8 %Sand: 43.0 %Silt: 34.6 %Clay: 22.4 pH: 7.6 CEC: 17.6. Field Prep./Maintenance: COVER SPRAY: S-METOLACHLOR/ATRAZINE (2880 G AI/HA) + MESOTRIONE (140 G AI/HA) ON MAY-17-16. COVER SPRAY: GLYPHOSATE (900 G AI/HA) ON JUN-13-16. Application Description

A Application Date: Jun-7-16 Time of Day: 10:25 Application Timing: POST Air Temperature, Unit: 16.2 C % Relative Humidity: 67.4 Wind Velocity, Unit: 5.1 KPH Wind Direction: W Dew Presence (Y/N): N Soil Temperature, Unit: 19.6 C Soil Moisture: DAMP % Cloud Cover: 95


A Crop 1 Code, BBCH Scale: ZEAMX C Stage Scale Used: DESC Stage Majority, Percent: V4 Stage Minimum, Percent: V4 Stage Maximum, Percent: V5 Height, Unit: 40 CM Height Minimum, Maximum: 35 50


A Operating Pressure, Unit: 207 kPa Nozzle Type: LOW DRIFT Nozzle Size: ULD120-02 Nozzle Spacing, Unit: 50 CM Nozzles/Row: 4 Boom Length, Unit: 2 M Boom Height, Unit: 50 CM Carrier: WATER Spray Volume, Unit: 200 L/ha Propellant: CO2

Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Rating Date Jun-14-16 Jun-21-16 Jun-28-16 Jul-5-16 Jun-21-16 Jul-5-16 Aug-2-16 Oct-17-16 Rating Type INJURY INJURY INJURY INJURY DISEASE DISEASE DISEASE YIELD Rating Unit % % % % % % % T/HA Crop Stage Majority V5-V6 V7-V8 V8-V10 V11 R1-R2 Crop Stage Minimum/Maximum V5 V6 V7 V8 V8 V10 V10 V12 R1 R2 Crop Stage Scale 45-70 CM 60-125CM 90-160CM 1.1-2.0M 2.1-2.5M Footnote Number 1 1 Trt-Eval Interval 7 DA-A 14 DA-A 21 DA-A 28 DA-A 14 DA-A 28 DA-A 56 DA-A 132 DA-A Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 1 2 3 4 5 6 7 10

1 Control 0 a 0 a 0 a 0 a 0 a 0 a 0 a 12.67 ab 2 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 12.91 ab 3 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 12.08 b pyraclostrobin (Headline) BASF 250 EC 100 g AI/ha A

4 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 12.75 ab pyraclostrobin/fluxapyroxad (Priaxor) BASF 500 EC 150 g AI/ha A

5 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 13.49 a pyraclostrobin/metconazole (Twinline) BASF 210 EC 105 g AI/ha A

6 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 13.47 a trifloxystrobin/propiconazole (Stratego) Baye 250 EC 200 g AI/ha A

7 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 12.93 ab azoxystrobin/propiconazole (Quilt) Syngenta 200 EC 200 g AI/ha A

8 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 12.53 ab trifloxystrobin/prothioconazole (StrategoPro) 325 SC 185.7 g AI/ha A


Footnote Number 1: TRACE OF NORTHERN LEAF BLIGHT AND PHYSODERMA BROWN SPOT.

14

EFFECT OF GLYPHOSATE PLUS FUNGICIDE APPLIED AT V4-V6 ON CROP INJURY, WEED CONTROL, DISEASE CONTROL AND CORN YIELD I CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16C2A Crop Code ZEAMX Rating Date Oct-17-16 Rating Type YIELD Rating Unit BU/AC Trt-Eval Interval 132 DA-A Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 11

1 Control 201.9 ab 2 glyphosate (Weathermax) 540 SN 900 g AI/ha A 205.6 ab 3 glyphosate (Weathermax) 540 SN 900 g AI/ha A 192.4 b pyraclostrobin (Headline) BASF 250 EC 100 g AI/ha A

4 glyphosate (Weathermax) 540 SN 900 g AI/ha A 203.2 ab pyraclostrobin/fluxapyroxad (Priaxor) BASF 500 EC 150 g AI/ha A

5 glyphosate (Weathermax) 540 SN 900 g AI/ha A 215.0 a pyraclostrobin/metconazole (Twinline) BASF 210 EC 105 g AI/ha A

6 glyphosate (Weathermax) 540 SN 900 g AI/ha A 214.6 a trifloxystrobin/propiconazole (Stratego) Baye 250 EC 200 g AI/ha A

7 glyphosate (Weathermax) 540 SN 900 g AI/ha A 205.9 ab azoxystrobin/propiconazole (Quilt) Syngenta 200 EC 200 g AI/ha A

8 glyphosate (Weathermax) 540 SN 900 g AI/ha A 199.7 ab trifloxystrobin/prothioconazole (StrategoPro) 325 SC 185.7 g AI/ha A

LSD (P=.05) 15.71 Standard Deviation 8.97 CV 4.38

Conclusions: This experiment was established to determine the effect of adding a fungicide [pyraclostrobin (Headline), pyraclostrobin/fluxapyroxad (Priaxor), pyraclostrobin/metconazole (Twinline), trifoxystrobin/propiconazole (Stratego), azoxystrobin/propiconazole (Quilt) or trifloxystrobin/ prothioconazole (Stratego Pro)] to glyphosate on corn injury, disease control, and corn yield. This experiment was maintained weed-free to eliminate the confounding effect of weed interference. At 7, 14, 21 and 28 DAA, there was no injury in corn from the glyphosate + fungicide combinations evaluated. At 14, 28 and 56 DAA, there was minimal disease present. There was no improvement in corn yield with the addition of a fungicide to glyphosate.

15

EFFECT OF GLYPHOSATE PLUS FUNGICIDE APPLIED AT V4-V6 ON CROP INJURY, WEED CONTROL, DISEASE CONTROL AND CORN YIELD II CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16C2B CROP: ZEAMX, FIELD CORN (RR & LL) (DKC 53-56). Planted: May-9-16, 78800 SEEDS/HA, 5 CM Deep, 75 CM Row Width. Planting Method: CONV. Emerged On: May-21-16. Expt. Design: RACOBL. Reps: 3. Plot Size: 2 m x 10 m. Expt. Location: RC - Range J3-C. Site Description: Soil Texture: L. %OM: 4.8 %Sand: 43.0 %Silt: 34.6 %Clay: 22.4 pH: 7.6 CEC: 17.6. Field Prep./Maintenance: COVER SPRAY: S-METOLACHLOR/ATRAZINE (2880 G AI/HA) + MESOTRIONE (140 G AI/HA) ON MAY-17-16.COVER SPRAY: GLYPHOSATE (900 G AI/HA) ON JUN-13-16. Application Description

A Application Date: Jun-17-16 Time of Day: 8:00 Application Timing: POST Air Temperature, Unit: 19.5 C % Relative Humidity: 65.4 Wind Velocity, Unit: 3.8 KPH Wind Direction: NNE Dew Presence (Y/N): Y Soil Temperature, Unit: 17.3 C Soil Moisture: WET % Cloud Cover: 0


A Crop 1 Code, BBCH Scale: ZEAMX C Stage Scale Used: DESC Stage Majority, Percent: V6 Stage Minimum, Percent: V6 Stage Maximum, Percent: V7 Height, Unit: 80 CM Height Minimum, Maximum: 60 90


A

Operating Pressure, Unit: 207 kPa Nozzle Type: LOW DRIFT Nozzle Size: ULD120-02 Nozzle Spacing, Unit: 50 CM Nozzles/Row: 4 Boom Length, Unit: 2 M Boom Height, Unit: 50 CM Carrier: WATER Spray Volume, Unit: 200 L/ha Propellant: CO2

Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Rating Date Jun-24-16 Jul-1-16 Jul-8-16 Jul-15-16 Jul-1-16 Jul-15-16 Aug-12-16 Oct-17-16 Rating Type INJURY INJURY INJURY INJURY DISEASE DISEASE DISEASE YIELD Rating Unit % % % % % % % T/HA Crop Stage Majority V8 V10 V14 V16 R3 Crop Stage Minimum/Maximum V6 V8 V9 V11 V12 V14 V14 V16 Crop Stage Scale 75-120CM 1.0-1.6M 1.4-2.0M 1.7-2.4M 2.1-2.6M Footnote Number 1 1 Trt-Eval Interval 7 DA-A 14 DA-A 21 DA-A 28 DA-A 14 DA-A 28 DA-A 56 DA-A 122 DA-A Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 1 2 3 4 5 6 7 10

1 Control 0 a 0 a 0 a 0 a 0 a 0 a 0 a 12.46 ab 2 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 11.99 abc 3 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 11.72 c pyraclostrobin (Headline) BASF 250 EC 100 g AI/ha A

4 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 11.59 c pyraclostrobin/fluxapyroxad (Priaxor) BASF 500 EC 150 g AI/ha A

5 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 11.73 c pyraclostrobin/metconazole (Twinline) BASF 210 EC 105 g AI/ha A

6 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 12.55 a trifloxystrobin/propiconazole (Stratego) Baye 250 EC 200 g AI/ha A

7 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 11.85 bc azoxystrobin/propiconazole (Quilt) Syngenta 200 EC 200 g AI/ha A

8 glyphosate (Weathermax) 540 SN 900 g AI/ha A 0 a 0 a 0 a 0 a 0 a 0 a 0 a 11.64 c trifloxystrobin/prothioconazole (StrategoPro) 325 SC 185.7 g AI/ha A


Footnote Number 1: TRACE OF NORTHERN LEAF BLIGHT AND PHYSODERMA BROWN SPOT.

16

EFFECT OF GLYPHOSATE PLUS FUNGICIDE APPLIED AT V4-V6 ON CROP INJURY, WEED CONTROL, DISEASE CONTROL AND CORN YIELD II CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16C2B Crop Code ZEAMX Rating Date Oct-17-16 Rating Type YIELD Rating Unit BU/AC Trt-Eval Interval 122 DA-A Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 11

1 Control 198.5 ab 2 glyphosate (Weathermax) 540 SN 900 g AI/ha A 191.0 abc 3 glyphosate (Weathermax) 540 SN 900 g AI/ha A 186.7 c pyraclostrobin (Headline) BASF 250 EC 100 g AI/ha A

4 glyphosate (Weathermax) 540 SN 900 g AI/ha A 184.7 c pyraclostrobin/fluxapyroxad (Priaxor) BASF 500 EC 150 g AI/ha A

5 glyphosate (Weathermax) 540 SN 900 g AI/ha A 186.9 c pyraclostrobin/metconazole (Twinline) BASF 210 EC 105 g AI/ha A

6 glyphosate (Weathermax) 540 SN 900 g AI/ha A 200.0 a trifloxystrobin/propiconazole (Stratego) Baye 250 EC 200 g AI/ha A

7 glyphosate (Weathermax) 540 SN 900 g AI/ha A 188.8 bc azoxystrobin/propiconazole (Quilt) Syngenta 200 EC 200 g AI/ha A

8 glyphosate (Weathermax) 540 SN 900 g AI/ha A 185.4 c trifloxystrobin/prothioconazole (StrategoPro) 325 SC 185.7 g AI/ha A

LSD (P=.05) 10.68 Standard Deviation 6.10 CV 3.21

Conclusions: This experiment was established to determine the effect of adding a fungicide [pyraclostrobin (Headline), pyraclostrobin/fluxapyroxad (Priaxor), pyraclostrobin/metconazole (Twinline), trifoxystrobin/propiconazole (Stratego), azoxystrobin/propiconazole (Quilt) or trifloxystrobin/ prothioconazole (Stratego Pro)] to glyphosate on corn injury, disease control, and corn yield. This experiment was maintained weed-free to eliminate the confounding effect of weed interference. At 7, 14, 21 and 28 DAA, there was no injury in corn from the glyphosate + fungicide combinations evaluated. At 14, 28 and 56 DAA, there was minimal disease present. There was no improvement in corn yield with the addition of a fungicide to glyphosate.

17

TOLERANCE OF CORN TO GLYPHOSATE + 2,4-D APPLIED POST I (DEKALB 52-61 & PIONEER P0094AM) CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16C3A CROP: ZEAMX, FIELD CORN (RR & LL) (DKC 52-61). Planted: May-5-16, 78800 SEEDS/HA, 5 CM Deep, 75 CM Row Width. Planting Method: CONV. Emerged On: May-17-16. ZEAMX, FIELD CORN (RR & LL) (PIONEER P0094AM). Planted: May-5-16, 78800 SEEDS/HA, 5 CM Deep, 75 CM Row Width. Planting Method: CONV. Emerged On: May-17-16. Expt. Design: FACTOR. Reps: 4. Plot Size: 3 m x 10 m. Expt. Location: RC - Range N1. Site Description: Soil Texture: SL. %OM: 4.0 %Sand: 53.4 %Silt: 32.5 %Clay: 14.1 pH: 6.3 CEC: 11.0. Field Prep./Maintenance: COVER SPRAY: S-METOLACHLOR/ATRAZINE (2880 G AI/HA) + MESOTRIONE (140 G AI/HA) ON MAY-17-16. COVER SPRAY: GLYPHOSATE (900 G AI/HA) ON JUN-17-16. Application Description

A B C Application Date: May-25-16 May-30-16 Jun-6-16 Time of Day: 8:25 9:55 14:10 Application Timing: POST POST POST Air Temperature, Unit: 22.7 C 26.7 C 26.3 C % Relative Humidity: 57.8 49.3 46.6 Wind Velocity, Unit: 3.6 KPH 2.7 KPH 5.6 KPH Wind Direction: SW W W Dew Presence (Y/N): N N N Soil Temperature, Unit: 15.3 C 20.2 C 27.5 C Soil Moisture: @ DEPTH DRY MOIST % Cloud Cover: 5 10 50


A B C Crop 1 Code, BBCH Scale: ZEAMX C ZEAMX C ZEAMX C Stage Scale Used: DESC DESC DESC Stage Majority, Percent: V1 80 V3 98 V5 95 Stage Minimum, Percent: V1 V2 2 V4 5 Stage Maximum, Percent: V2 20 V3 V5 Height, Unit: 8 CM 25 CM 40 CM Height Minimum, Maximum: 6 10 15 30 30 45

Crop 2 Code, BBCH Scale: ZEAMX C ZEAMX C ZEAMX C Stage Scale Used: DESC DESC DESC Stage Majority, Percent: V1 80 V3 98 V5 95 Stage Minimum, Percent: VC 2 V2 2 V4 5 Stage Maximum, Percent: V2 18 V3 V5 Height, Unit: 8 CM 25 CM 40 CM Height Minimum, Maximum: 4 10 15 30 30 45


A B C Operating Pressure, Unit: 207 kPa 207 kPa 207 kPa Nozzle Type: LOW DRIFT LOW DRIFT LOW DRIFT Nozzle Size: ULD120-02 ULD120-02 ULD120-02 Nozzle Spacing, Unit: 50 CM 50 CM 50 CM Nozzles/Row: 3 3 3 Boom Length, Unit: 1.5 M 1.5 M 1.5 M Boom Height, Unit: 50 CM 50 CM 50 CM Carrier: WATER WATER WATER Spray Volume, Unit: 200 L/ha 200 L/ha 200 L/ha Propellant: CO2 CO2 CO2

Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Description DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61 Part Rated 10 PLA - 4M BRC.RT - Rating Date Jul-4-16 Aug-2-16 Jun-20-16 Jun-20-16 Jun-20-16 Aug-2-16 Rating Type INJURY INJURY INJURY INJURY AV. HT AV.STAND GOOSENECK MALFORM Rating Unit % % % % CM #/M ROW % % Crop Stage Majority V13-V14 R2 Crop Stage Scale 1.8-2.0M 2.4-2.6M Footnote Number 1 2 3 4 5 Trt-Eval Interval 7DA_ 14DA_ 28 DA-C 57 DA-C 14 DA-C 14 DA-C 14 DA-C 56 DA-C Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 1 2 3 4 5 6 7 8 TABLE OF R MEANS Replicate 1 16 13 8 7 108 6.7 3 14 Replicate 2 16 14 8 7 108 6.9 3 14 Replicate 3 14 10 7 7 104 6.7 3 14 Replicate 4 16 11 9 9 108 7.1 3 15 TABLE OF A (Timing) MEANS

1 POST 1 = V1 stage - 1 collar, 3 leaves A 3 a 2 a 0 a 0 a 109 a 6.9 0 a 0 a 2 POST 2 = V3 stage - 3 collar, 5 leaves B 21 b 18 b 9 b 6 b 104 b 6.8 3 b 2 b 3 POST 3 = V5 stage - 5 collar, 7 leaves C 22 b 16 c 15 c 17 c 107 a 6.9 6 c 41 c LSD = 3 3 2 2 3 NS 1 2

TABLE OF B (Glyphosate Rate) MEANS 1 Control 4 a 3 a 3 a 4 a 108 a 6.9 1 a 11 a 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 27 b 21 b 13 b 11 b 105 b 6.8 5 b 18 b LSD = 2 3 1 2 3 NS 1 1

TABLE OF C (2,4-D Amine Rate) MEANS 1 Control 0 a 0 a 0 a 0 a 111 a 7.0 0 a 0 a 2 2,4-D amine 564 SL 560 g AI/ha 18 b 14 b 8 b 9 b 105 b 6.8 3 b 18 b 3 2,4-D amine 564 SL 1120 g AI/ha 29 c 22 c 15 c 14 c 104 b 6.8 6 c 25 c LSD = 3 3 2 2 3 NS 1 2

TABLE OF A (Timing) B (Glyphosate Rate) MEANS 1 POST 1 = V1 stage - 1 collar, 3 leaves A 0 a 0 a 0 a 0 a 108 a 7.1 0 a 0 a 1 Control 2 POST 2 = V3 stage - 3 collar, 5 leaves B 1 a 0 a 0 a 0 a 108 a 6.8 0 a 0 a 1 Control 3 POST 3 = V5 stage - 5 collar, 7 leaves C 12 b 9 b 10 b 13 b 108 a 6.8 3 b 34 b 1 Control 1 POST 1 = V1 stage - 1 collar, 3 leaves A 6 a 3 a 0 a 0 a 109 a 6.7 0 a 0 a 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 42 c 37 c 18 b 12 b 100 b 6.7 6 b 4 b 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 33 b 23 b 20 c 20 c 106 a 6.9 9 c 49 c 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha LSD = 4 5 2 3 5 NS 1 2

18

TOLERANCE OF CORN TO GLYPHOSATE + 2,4-D APPLIED POST I (DEKALB 52-61 & PIONEER P0094AM) CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16C3A Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Description DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61 Part Rated 10 PLA - 4M - BRC.RT - Rating Date Jul-4-16 Aug-2-16 Jun-20-16 Jun-20-16 Jun-20-16 Aug-2-16 Rating Type INJURY INJURY INJURY INJURY AV. HT AV.STAND GOOSENECK MALFORM Rating Unit % % % % CM #/M ROW % % Crop Stage Majority V13-V14 R2 Crop Stage Scale 1.8-2.0M 2.4-2.6M Footnote Number 1 2 3 4 5 Trt-Eval Interval 7DA_ 14DA_ 28 DA-C 57 DA-C 14 DA-C 14 DA-C 14 DA-C 56 DA-C Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 1 2 3 4 5 6 7 8 TABLE OF A (Timing) C (2,4-D Amine Rate) MEANS

1 POST 1 = V1 stage - 1 collar, 3 leaves A 0 0 0 0 112 6.9 0 0 1 Control 2 POST 2 = V3 stage - 3 collar, 5 leaves B 0 0 0 0 110 7.0 0 0 1 Control 3 POST 3 = V5 stage - 5 collar, 7 leaves C 0 0 0 0 112 6.9 0 0 1 Control 1 POST 1 = V1 stage - 1 collar, 3 leaves A 3 a 1 a 0 a 0 a 107 6.9 0 a 0 a 2 2,4-D amine 564 SL 560 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 26 b 23 b 9 b 6 b 102 6.6 4 b 2 a 2 2,4-D amine 564 SL 560 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 26 b 18 b 16 c 20 c 105 6.8 6 c 53 b 2 2,4-D amine 564 SL 560 g AI/ha 1 POST 1 = V1 stage - 1 collar, 3 leaves A 7 a 3 a 0 a 0 a 108 6.9 0 a 0 a 3 2,4-D amine 564 SL 1120 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 38 b 33 b 18 b 13 b 100 6.6 5 b 5 b 3 2,4-D amine 564 SL 1120 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 41 b 30 b 28 c 30 c 105 6.9 12 c 71 c 3 2,4-D amine 564 SL 1120 g AI/ha LSD = 4 6 3 3 NS NS 2 3

TABLE OF B (Glyphosate Rate) C (2,4-D Amine Rate) MEANS 1 Control 0 a 0 a 0 a 0 a 110 a 7.0 0 a 0 a 1 Control 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 0 a 0 a 0 a 0 a 113 a 6.9 0 a 0 a 1 Control 1 Control 4 a 3 a 4 a 5 a 106 a 6.9 1 a 14 a 2 2,4-D amine 564 SL 560 g AI/ha 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 32 b 25 b 13 b 12 b 103 a 6.8 6 b 23 b 2 2,4-D amine 564 SL 560 g AI/ha 1 Control 9 a 6 a 6 a 8 a 108 a 6.9 2 a 20 a 3 2,4-D amine 564 SL 1120 g AI/ha 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 49 b 38 b 25 b 21 b 100 b 6.7 9 b 30 b 3 2,4-D amine 564 SL 1120 g AI/ha LSD = 4 5 2 3 5 NS 1 2

TABLE OF A (Timing) B (Glyphosate Rate) C (2,4-D Amine Rate) MEANS 1 POST 1 = V1 stage - 1 collar, 3 leaves A 0 0 0 0 111 7.2 0 0 1 Control 1 Control 2 POST 2 = V3 stage - 3 collar, 5 leaves B 0 0 0 0 108 6.9 0 0 1 Control 1 Control 3 POST 3 = V5 stage - 5 collar, 7 leaves C 0 0 0 0 111 6.9 0 0 1 Control 1 Control 1 POST 1 = V1 stage - 1 collar, 3 leaves A 0 0 0 0 112 6.7 0 0 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 1 Control 2 POST 2 = V3 stage - 3 collar, 5 leaves B 0 0 0 0 113 7.1 0 0 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 1 Control 3 POST 3 = V5 stage - 5 collar, 7 leaves C 0 0 0 0 113 7.0 0 0 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 1 Control 1 POST 1 = V1 stage - 1 collar, 3 leaves A 0 a 0 a 0 a 0 a 105 7.1 0 a 0 a 1 Control 2 2,4-D amine 564 SL 560 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 0 a 0 a 0 a 0 a 109 6.6 0 a 0 a 1 Control 2 2,4-D amine 564 SL 560 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 13 b 9 b 11 b 16 b 106 6.8 3 b 43 b 1 Control 2 2,4-D amine 564 SL 560 g AI/ha

19

TOLERANCE OF CORN TO GLYPHOSATE + 2,4-D APPLIED POST I (DEKALB 52-61 & PIONEER P0094AM) CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16C3A Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Description DK 52-61 DK 52-61 DK

DK 52-61 DK 52-61 DK 52-61 DK 52-61 DK 52-61

Part Rated 10 PLA - 4M - BRC.RT - Rating Date Jul-4-16 Aug-2-16 Jun-20-16 Jun-20-16 Jun-20-16 Aug-2-16 Rating Type INJURY INJURY INJURY INJURY AV. HT AV.STAND GOOSENECK MALFORM Rating Unit % % % % CM #/M ROW % % Crop Stage Majority V13-V14 R2 Crop Stage Scale 1.8-2.0M 2.4-2.6M Footnote Number 1 2 3 4 5 Trt-Eval Interval 7DA_ 14DA_ 28 DA-C 57 DA-C 14 DA-C 14 DA-C 14 DA-C 56 DA-C Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 1 2 3 4 5 6 7 8

1 POST 1 = V1 stage - 1 collar, 3 leaves A 6 a 3 a 0 a 0 a 108 6.8 0 a 0 a 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 2 2,4-D amine 564 SL 560 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 51 c 45 c 19 b 12 b 96 6.6 8 b 4 b 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 2 2,4-D amine 564 SL 560 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 39 b 26 b 21 b 24 c 104 6.9 9 b 64 c 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 2 2,4-D amine 564 SL 560 g AI/ha 1 POST 1 = V1 stage - 1 collar, 3 leaves A 0 a 0 a 0 a 0 a 109 7.1 0 a 0 a 1 Control 3 2,4-D amine 564 SL 1120 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 2 a 0 a 0 a 0 a 108 6.9 0 a 1 a 1 Control 3 2,4-D amine 564 SL 1120 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 24 b 17 b 19 b 23 b 108 6.8 7 b 59 b 1 Control 3 2,4-D amine 564 SL 1120 g AI/ha 1 POST 1 = V1 stage - 1 collar, 3 leaves A 13 a 6 a 0 a 0 a 108 6.8 0 a 0 a 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 3 2,4-D amine 564 SL 1120 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 74 c 65 c 36 b 26 b 92 6.4 11 b 9 b 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 3 2,4-D amine 564 SL 1120 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 59 b 43 b 38 b 36 c 101 6.9 17 c 83 c 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 3 2,4-D amine 564 SL 1120 g AI/ha

LSD = 6 8 4 5 NS NS 2 4

Footnote Number 1: T.1-6, JUN-1-16 (7 DA-A): V3-4, 25-35 CM. T.7-12, JUN-6-16 (7 DA-B): V5, 35-60 CM. T.13-18, JUN-13-16 (7 DA-C): V6, 60-90 CM. INJURY: CORN LEANING OVER, STEM BENDING (MOST SEVERE BENT AT GROUND LEVEL). Footnote Number 2: T.1-6, JUN-8-16 (14 DA-A): V5, 40-65 CM; T.7-12, JUN-13-16 (14 DA-B): V6, 60-90 CM; T.13-18, JUN-20-16 (14 DA-C): V8, 100-120 CM. INJURY: CORN SPIKY, LEAF WRAPPING, LEANING OVER/STEM BENDING (MOST SEVERE, KINKED AT BASE), IN C APPLICATION, SOME CORN PLANTS SNAPPED OFF AT BASE. Footnote Number 3: STUNTING, SPIKY LEAVES/UNFURLING ISSUES, STEM BEND AT BASE. Footnote Number 4: STUNTING, SPIKY LEAVES/UNFURLING ISSUES, STEM BEND AT BASE. T.11-12 AND 17-18: LEAVES LOOK STRAPPY (THIN). DOES NOT INCLUDE BRACE ROOT INJURY (SEPARATE RATING). Footnote Number 5: FUSED, STUBBY, MALFORMED BRACE ROOTS. 0=NO INJURY, 100=COMPLETELY FUSED AND/OR MALFORMED.

20

TOLERANCE OF CORN TO GLYPHOSATE + 2,4-D APPLIED POST I (DEKALB 52-61 & PIONEER P0094AM) CHRISTY SHROPSHIRE, PETER SIKKEMA EXPERIMENT ID: FC16C3A Crop Code ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX ZEAMX Description DK 52-61 DK 52-61 DK 52-61 P0094AM P0094AM P0094AM P0094AM P0094AM P0094AM Part Rated COB - 10 PLA - 4M - Rating Date Oct-11-16 Oct-19-16 Oct-19-16 Jul-4-16 Aug-2-16 Jun-20-16 Jun-20-16 Rating Type DEFORM. YIELD YIELD INJURY INJURY INJURY INJURY AV. HT AV.STAND Rating Unit % T/HA BU/AC % % % % CM #/M ROW Crop Stage Majority R6 V13-V14 R2 Crop Stage Scale 1.8-2.0M 2.4-2.6M Trt-Eval Interval 127 DA-C 135 DA-C 135 DA-C 7DA_ 14DA_ 28 DA-C 57 DA-C 14 DA-C 14 DA-C Trt Treatment Form Form Rate Appl No. Name Conc Type Rate Unit Code 9 12 13 14 15 16 17 18 19 TABLE OF R MEANS Replicate 1 6 12.54 199.8 10 5 4 6 114 6.7 Replicate 2 5 14.13 225.2 8 4 4 4 114 7.1 Replicate 3 5 15.02 239.3 10 4 4 5 109 7.1 Replicate 4 4 14.88 237.1 9 5 4 5 110 7.0 TABLE OF A (Timing) MEANS

1 POST 1 = V1 stage - 1 collar, 3 leaves A 5 a 15.16 a 241.5 a 1 a 0 a 0 a 0 a 112 7.1 2 POST 2 = V3 stage - 3 collar, 5 leaves B 5 a 13.56 b 216.0 b 8 b 2 b 1 b 1 b 113 6.9 3 POST 3 = V5 stage - 5 collar, 7 leaves C 6 b 13.72 b 218.5 b 19 c 11 c 10 c 14 c 111 6.9 LSD = 1 0.6 9.6 1 1 1 1 NS NS

TABLE OF B (Glyphosate Rate) MEANS 1 Control 5 14.47 a 230.5 a 3 a 2 a 1 a 3 a 112 7.0 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 5 13.82 b 220.2 b 15 b 8 b 6 b 7 b 111 7.0 LSD = NS 0.49 7.8 1 1 1 1 NS NS

TABLE OF C (2,4-D Amine Rate) MEANS 1 Control 4 a 14.91 a 237.5 a 0 a 0 a 0 a 0 a 115 a 7.2 a 2 2,4-D amine 564 SL 560 g AI/ha 6 c 13.89 b 221.3 b 10 b 4 b 3 b 5 b 109 c 6.7 b 3 2,4-D amine 564 SL 1120 g AI/ha 5 b 13.63 b 217.2 b 18 c 10 c 8 c 10 c 112 b 7.0 a LSD = 1 0.6 9.6 1 1 1 1 3 0.3

TABLE OF A (Timing) B (Glyphosate Rate) MEANS 1 POST 1 = V1 stage - 1 collar, 3 leaves A 4 15.04 a 239.6 a 0 a 0 a 0 a 0 a 112 7.2 1 Control 2 POST 2 = V3 stage - 3 collar, 5 leaves B 5 14.89 a 237.2 a 0 a 0 a 0 a 0 a 113 7.0 1 Control 3 POST 3 = V5 stage - 5 collar, 7 leaves C 5 13.47 b 214.6 b 10 b 5 b 4 b 9 b 111 6.7 1 Control 1 POST 1 = V1 stage - 1 collar, 3 leaves A 5 15.28 a 243.4 a 2 a 1 a 0 a 0 a 111 7.1 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 5 12.23 c 194.8 c 15 b 5 b 3 b 2 b 113 6.9 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 6 13.96 b 222.5 b 28 c 17 c 16 c 18 c 111 7.0 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha LSD = NS 0.85 13.6 2 2 1 2 NS NS

TABLE OF A (Timing) C (2,4-D Amine Rate) MEANS 1 POST 1 = V1 stage - 1 collar, 3 leaves A 4 15.34 a 244.5 a 0 0 0 0 113 7.4 1 Control 2 POST 2 = V3 stage - 3 collar, 5 leaves B 4 15.15 ab 241.3 ab 0 0 0 0 115 7.2 1 Control 3 POST 3 = V5 stage - 5 collar, 7 leaves C 5 14.23 b 226.8 b 0 0 0 0 116 6.9 1 Control 1 POST 1 = V1 stage - 1 collar, 3 leaves A 5 15.12 a 240.9 a 1 a 0 a 0 a 0 a 109 6.9 2 2,4-D amine 564 SL 560 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 6 12.95 b 206.4 b 7 b 3 b 1 b 0 a 110 6.7 2 2,4-D amine 564 SL 560 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 7 13.60 b 216.7 b 21 c 10 c 9 c 15 b 108 6.7 2 2,4-D amine 564 SL 560 g AI/ha 1 POST 1 = V1 stage - 1 collar, 3 leaves A 5 15.01 a 239.2 a 2 a 1 a 0 a 0 a 113 7.1 3 2,4-D amine 564 SL 1120 g AI/ha 2 POST 2 = V3 stage - 3 collar, 5 leaves B 5 12.58 b 200.3 b 16 b 5 b 3 b 3 b 112 7.0 3 2,4-D amine 564 SL 1120 g AI/ha 3 POST 3 = V5 stage - 5 collar, 7 leaves C 6 13.31 b 212.1 b 37 c 24 c 21 c 26 c 109 7.0 3 2,4-D amine 564 SL 1120 g AI/ha LSD = NS 1.04 16.6 2 2 1 2 NS NS

TABLE OF B (Glyphosate Rate) C (2,4-D Amine Rate) MEANS 1 Control 4 14.81 a 236.0 a 0 0 0 0 114 7.0 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 5 15.00 a 239.0 a 0 0 0 0 115 7.4 1 Control 1 Control 6 14.28 a 227.5 a 3 a 1 a 1 a 3 a 108 6.9 2 2,4-D amine 564 SL 560 g AI/ha 2 glyphosate (Weathermax) 540 SL 1800 g AI/ha 6 13.50 a 215.1 a 17 b 8 b 6 b 7 b 110 6.6 2 2,4-D amine 564 SL

weed control trials research report 2016 · 2020-07-28 · 2016 . p.h. sikkema. go to edible bean...

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