GRAIN SORGHUM WEED CONTROL UPDATE – 2015GRAIN SORGHUM WEED CONTROL UPDATE – 2015Eric P. Prostko, Ph.D.Eric P. Prostko, Ph.D.

Extension Weed SpecialistExtension Weed Specialist

Berrien Co, October 2014

GRAIN SORGHUM WEED CONTROLGRAIN SORGHUM WEED CONTROL

1)1)Start clean!Start clean!2)2)Concep treated seedConcep treated seed3)3)Dual Magnum or Warrant (PRE)Dual Magnum or Warrant (PRE)4)4)Atrazine (POST)Atrazine (POST)5)5)Paraquat (Hooded sprayer)Paraquat (Hooded sprayer)6)6)Mechanical CultivationMechanical Cultivation

Weed Control in Grain Sorghum - 2013

SG-02-13June 341 DAP

NTC Dual II Magnum 7.64EC @ 1 pt/A (PRE)Aatrex 4L @ 48 oz/A (POST)

COC @ 1% v/v (POST)

A New Product to Consider?A New Product to Consider?

• Huskie 2.06ECHuskie 2.06EC• Bayer CropScienceBayer CropScience• Buctril (1.75 lbs/gal) + pyrasulfotole (0.31 Buctril (1.75 lbs/gal) + pyrasulfotole (0.31

lbs/gal)lbs/gal)• MOA = 6 + 27MOA = 6 + 27• Postemergence (13-16 oz/A)Postemergence (13-16 oz/A)• 3-leaf to 12” tall sorghum3-leaf to 12” tall sorghum• Broadleaf weeds, good on pigweedBroadleaf weeds, good on pigweed• Tank-mix with atrazine (16 oz/A)Tank-mix with atrazine (16 oz/A)

Huskie Weed Control/Injury – 2014

NTC Huskie @16 oz/AAatrex @ 16 oz/A

AMS @ 1 lb/ANIS @ 0.25% v/v

Huskie @16 oz/AAMS @ 1 lb/A

NIS @ 0.25% v/v

SG-02-14May 197 DAT

Huskie Injury on Sorghum

Huskie Rotation Restrictions(cotton and peanut are not listed)

Inzen™ Z Grain Sorghum Kansas State Univ. DuPont/Advanta US Resistance to POST

applications of ALS herbicides

Non-GMO ALS-resistant shattercane

Dual/Cinch/Warrant PRE a must in my opinion Concep treated seed

Stewardship!!! Zest (liquid Accent)

Weed Control in Inzen Sorghum - 2014

SG-01-14June 1931 DAP

NTC Dual II Magnum 7.62EC @ 16 oz/A – PREZest 0.33SC @ 12 oz/A – POST +

Atrazine 90DF @ 13.3 oz/A – POST +COC @ 1% v/v - POST

Don’t Plant Sorghum in Fields Treated with Reflex in the same year!!!!

Current UGA Canola Weed Control Research

Howard F. Schwartz, Colorado State University, Bugwood.org

NTC vs. Dual Magnum @ 3.5 oz/A + Command @ 3.5 oz/A – PRE

CAN-01-1411/21/1435 DAT

Canola Response to PRE Applied Reflex - 35 DAT

8 oz/A 4 oz/A 2 oz/A

CAN-02-1411/21/14

Average field half-life for Reflex is 100 days

Must be timely with Beyond in canola!1 week too late

NTCNTC

Beyond 1AS @ 4 oz/ABeyond 1AS @ 4 oz/AAdept @ 0.25% v/vAdept @ 0.25% v/v

AMS XTRA @ 2.5% v/vAMS XTRA @ 2.5% v/v2 WAT2 WAT

CAN-01-1412/05/14

Questions or Comments?Questions or Comments?eprostko@uga.edueprostko@uga.eduwww.gaweed.comwww.gaweed.com