2014: fine tuning the fumigant system

2014: Fine Tuning The Fumigant System

Stanley Culpepper,

University of Georgia

Tifton Campus

Potential MB Fumigant Alternatives

1. UGA 3-WAY

2. Paladin Pic

3. Trifecta

4. Pic Chlor 60

Production Goal

3 to 6 Crops1

or 2

Cro

ps

FUMIGANT OPTIONS FUMIGANT OPTIONS

Fumigant Research 2013 and Fumigant Research 2013 and 20142014

Distance between sites: 67 miles


1. UGA 3-WAY

2. Paladin Pic

3. Trifecta

4. Pic Chlor 60

UGA 3-WAY Telone/Pic/Metam

Metam = 4 in. (75 G)

Chloropicrin = 8 in. (150 lb)

Telone II = 12 in. (12 G)

Ideal Placement

Metam = 4 in. (75 G)

Pic Chlor 60 = 8 in. (21 G)

More Common

Applicators used to inject metam 4” deep and 4” apart in the final bed

Nutsedge response to the 3-WAY. Tift Co., 2013.

0

20

40

60

80

100

Plots were 1 bed by 150 feet. Fall soil temp 84. (Veg 43-13)

LDPE VIF TIF

91 b89 b99 a

%

160 plant/A464 plant/A494 plant/A

82,460 plant/A check

Nutsedge response to the 3-WAY. Echols Co., 2013.

0

20

40

60

80

100

Plots were 1 bed by 150 feet. Spring soil temp 64. (Veg 13-13)

LDPE VIF TIF

85 b

65 c

97 a

%

290 plant/A6960 plant/A37,265 plant/A


3-WAY; LDPECheck

UGA 3-WAY. Fall 2013. Tift Co.

3-WAY; TIF Check

UGA 3-WAY. Fall 2013. Tift Co.

UGA 3-WAY

GA/FL Line (sands)Light to Severe: UGA 3-WAY TIF

Herbicide NOT Required

(would still suggest Dual Topical for pepper)

Rates Driven By Nutsedge Populations

UGA 3-WAY

Herbicide NOT Required

(would still suggest Dual Topical)


FALL: South GA (loamy sands)Light : 3-WAY LDPEModerate to Severe: 3-WAY TIF

SPRING: South GA (loamy sands)Light to Moderate: 3-WAY LDPESevere: 3-WAY TIF

Pic Chlor 60

1. UGA 3-WAY

2. Paladin Pic

3. Trifecta

4. Pic Chlor 60

Nutsedge response to the Pic Chlor 60. Tift Co., 2013.

0

20

40

60

80

100

Plots were 1 bed by 150 feet. Spring soil temp 58F. (Veg 14-13)

VIF TIF

83 b

61 b

95 a

%

1740 plant/A9425 plant/A23,925 plant/A


82 b

11,890 plant/A

21 GPA 28 GPA 21 GPA 28 GPA

Nutsedge response to the Pic Chlor 60. Echols Co., 2013.

0

20

40

60

80

100


18 b

84 a

%

29,870 plant/A248,820 plant/A

28 GPAVIF

28 GPATIF


Pic Chlor 60

Light to Moderate: 28 G (340 lb) TIF

Moderate to Severe: 28 GPA TIF

Herbicide System Required

Rates Driven By Nutsedge

Palmer Amaranth Control With Pic Chlor 60. Tift Co., 2013.

Plus Dual Mag 12 oz/ANo Herbicide

Nutsedge response to the fumigants. Echols Co., 2013.

0

20

40

60

80

100


UGA 3-WAYTIF

MB 67:33240 LB

TIF

84 b

95 a

%

290 plant/A 308 plant/A


97a

PIC CHLOR 60TIF

6380 plant/A


1. UGA 3-WAY

2. Paladin Pic

3. Trifecta

4. Pic Chlor 60

Paladin Pic

Light to Moderate: 40-45 GPA TIF

Moderate to Severe: 50 GPA TIF


Rates Driven By Nutsedge

Paladin Pic

Light Populations:

40 GPA TIF

Moderate to Severe:

50 GPA TIF


BE CAREFUL FOR ODOR MANAGEMENT

Trifecta

1. UGA 3-WAY

2. Paladin Pic

3. Trifecta

4. Pic Chlor 60

Trifecta

Light to Moderate: 350-375 LB/A TIF

Moderate to Severe: 375-400 LB/A TIF



Trifecta

Light Populations:

40 GPA TIF

Moderate to Severe:

50 GPA TIF


BE CAREFUL FOR ODOR MANAGEMENT

2015

OPTIONS INCREASE …..I THINK

Systems for 2015. Tift Co., 2013.

0

20

40

60

80

100


Paladin Pic40 G

3-WAYTIF

System A

85 b72 c

99.9 a

%

40 P/A 35 P/A1470 P/A


94ab

Trifecta350 lb

83 P/A

System B

99.9 a

380 P/A

System A Check

New Systems Potential

BENEFITS:Outstanding pest control.Equal cost or slightly lower??? Reduced buffer restrictions.Far more consistent.No herbicide under mulch.Lower odor concerns.

New Systems Potential

NEGATIVES:2 or 3 fumigants; 2 application pointsShank inject 4 inches on bed top Slower application than Trifecta, Pic ChlorPlant back interval longer

2014 Fumigant System Effectiveness

1. UGA 3-WAY TIF

2. Paladin Pic >= Trifecta TIF

3. 3-WAY (Spring) LDPE (not GA/FL line)

4. Pic Chlor 60 at 28 GPA TIF


1. System A

2. System B

3. System C

4. UGA 3-WAY TIF





1. System A

2. System B

3. System C

4. UGA 3-WAY TIF




COST VS CONTROL??

Fumigant Plant Back Intervals

PEST

CONTROL

PLANT

BACK

Factors Influencing Rate/Control

FUMIGANT

RATE

1.

1. Higher populations of nutsedge

2. Warmer soil temperatures

3. Low moisture conditions (not wet either)

4. Soft bed (compaction)—double press??

5. Lighter texture the soil


FUMIGANT

RATE

1.




4. Soft bed (compaction)

5. Lighter texture the soilINFLUENCE CONCENTRATION OVER TIME


FUMIGANT

RATE

1.




4. Soft bed (compaction)

5. Lighter texture the soil

We can influence quite quickly if willing!!!!

Managing Nutsedge YEAR ROUND

1. Row middles with Sandea

2. Spray as soon as crop done:

Roundup 2 qt/A fb 2 qt/A 10 days later! Then treat as needed.

0

20

40

60

80

100

1 2 3 4 5

no wash

washed

Amount of Sandea remaining on plastic mulch. TyTy GA, 2005.

per

cen

t

days Grey, Culpepper

Managing Nutsedge YEAR ROUND

1. Row middles with Sandea

2. Spray as soon as crop done:

3. When mulch is out of field:

ROTATE DISKING WITH ROUNDUP AND 1 QT 3WK AFTER NUTSEDGE EMERGENCE

ADD SANDEA IN WITH ROUNDUP ONCE IF NOT CARRYOVER PROBLEMS

Questions or Comments?

Continued Thanks: William UpChurch and Perry Fuller

2014: fine tuning the fumigant system

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