1. 2016 Fumigant Systems Stanley Culpepper, University of Georgia
Tifton Campus

2. Focus Points Trifecta gone; 5 systems exist.
December fumigation for spring crop.
Keeping the fumigant in the bed.

3. Fumigant Systems For Weeds
Paladin Pic + Vapam TIF
UGA 3-WAY* TIF
All common weeds
3. Paladin Pic TIF
Good nutsedge, watch grass and pigweed
4. UGA 3-WAY LDPE
Watch nutsedge, good grass and pigweed
Watch nutsedge, grass, and pigweed… ...nematodes??
5. Pic Chlor 60 TIF
*UGA 3-WAY: system of Telone II, Pic, Metam

4. Telone II Application 12 to 16 “ deep

5. Low Nematode Levels Paladin Pic or Chloropicrin placed 8 inches deep
Pic Chlor 60 = 8-10 in. (21 G)

6. Metam Application with blades 4” apart applying metam 4” deep – no herbicide under mulch

8. Paladin Pic + Vapam TIF
Check

9. UGA 3-WAY. Fall Tift Co.
3-WAY; TIF
Check

10. Nutsedge response to the 3-WAY. Tift Co., 2013.
89 b %
494 plant/A
160 plant/A
LDPE
TIF
Plots were 1 bed by 150 feet. Fall soil temp 84. (Veg 43-13)
82,460 plant/A check

11. Nutsedge response to the 3-WAY. Echols Co., 2013.%
37,265 plant/A
290 plant/A
LDPE
TIF
Plots were 1 bed by 150 feet. Spring soil temp 64. (Veg 13-13)
319,250 plant/A check

12. Fumigant (PPM) Levels In Bed
Much
4 weeks
2015
2016
UGA -LDPE 25 37
UGA-TIF
290
345

13. How Intense is the Population?

14. Factors Influencing Rate/Control = Keeping Fumigant in the Bed
Bed formation/compaction
Mulch type
Moisture
Soil Temp
Soil Texture 1.
INFLUENCE CONCENTRATION OVER TIME

15. Nutsedge plants/A as impacted by fumigation time of year. Tifton, 2015.
Dec 11
Feb 5
32224
3581
UGA 3-WAY
LDPE
Plots 1 bed by 90 feet. (Veg 2-15). Non-treated control 203,280 plant/A. LSD 5420

16. Nutsedge plants/A as impacted by fumigation time of year. Tifton, 2015.
Dec 11
Feb 5
32224
7018
3581
3872
1451
484
UGA 3-WAY
LDPE
UGA 3-WAY
TIF
Trifecta + Vapam
TIF
Plots 1 bed by 90 feet. (Veg 2-15). Non-treated control 203,280 plant/A. LSD 5420

17. Fumigant (PPM) Levels In Bed
Much
4 weeks
Dec 11
Feb 5
UGA -LDPE 25
UGA-TIF
290 6
Trifecta + Vapam-TIF
1465 88

18. Fumigant (PPM) Levels In Bed
Much
4 weeks
8 weeks
Dec 11
Feb 5
UGA -LDPE 25
UGA-TIF
290 6 14
Trifecta + Vapam-TIF
1465 88

19. Spring PlantBack?

20. Cover Crop Should Establish More Rapidly with Dec Fumigation
2 weeks
3 weeks

21. Nematode Impact on Cucumber
Fumigant/Much
Galling
Dec 11
Feb 5 NT
4.0
2.3
UGA – LDPE
0.1
Trifecta + Vapam - TIF
0.2
MCW + Pic + Vapam-LDPE
Foster, Sanders, Bhabesh. LSD galling = 0.6.

22. Fall Fumigation
Work rotation to treat lower infested fields in fall????
Higher fumigant rates needed?
TIF mulch over LDPE?
Herbicides……but injury more likely with those under mulch!!

25. Single Drip Metam Application – 3 WAT.

26. Fumigant (PPM) Levels In Bed: 5 Days
Spring Drip
Double Drip
15000
15000
7400
6000
15000
15000

27. REGULATORY CHALLENGES

28. BE CAREFUL FOR ODOR MANAGEMENT
Paladin Pic Systems
Light Populations:
40 GPA TIF
Moderate to Severe:
50 GPA TIF
BE CAREFUL FOR ODOR MANAGEMENT
MUST USE TIF MULCH

29. Managing Nutsedge YEAR ROUND
Select the right fumigant system
Sandea in crop when feasible
Sandea row middles
4. Terminate crops/weeds as soon as crop done

30. ROTATE DISKING WITH ROUNDUP AND 1 QT 3WK AFTER NUTSEDGE EMERGENCE
ADD SANDEA IN WITH ROUNDUP ONCE IF NOT CARRYOVER PROBLEMS

31. Continued Thanks: William UpChurch and Perry Fuller
Questions or Comments?
Continued Thanks: William UpChurch and Perry Fuller