1. Replacing Methyl Bromide in Multiple Crop Plasticulture
Stanley Culpepper
University of Georgia
Tifton Campus

2. Complete pest control critical for 1st crop when growing multiple crops!

3. Purple and Yellow Nutsedges:
Most Troublesome Weeds of Cucurbits, Fruiting Vegetables, Cole Crops and Greens, and Other Vegetables
As evidenced in the 40 acre field that I showed to you, nutsedges are the major weed problems in plasticulture systems. While the plastic mulch will do an excellent job preventing the growth of most weeds, nutsedges are capable of piercing through the plastic barrier and competing with the crop for water and nutrients. Following the elimination of methyl bromide use, growers may be without tools to effectively manage nutsedges. My vegetable research focuses on nutsedge control and management. As there is a critical deadline looming, my project has taken on a very applied flavor. In addition to this, I am also evaluating nutsedge growth in plasticulture systems and searching for ways to minimize nutsedge fecundity.

4. MB Alternatives Require a System
Fumigants
Mulches
Herbicides

5. Potential MB Alternatives (Multiple crops)
MIDAS 50:50 or 98:2 (methyl iodide + pic)
DMDS 79:21 (dimethyl disulfide + pic.)
Telone II fb chloropicrin fb Vapam (3 WAY)

6. Numerous Mulch Options
Relationship of the mulch cost and ability to reduce fumigant rate and cost

7. DMDS 60 G, Blockade
DMDS 70 G, LDPE

8. Telone II fb Pic fb Vapam
Telone II fb Vapam
LDPE mulch
Telone II fb Pic
LDPE mulch
Telone II fb Pic fb Vapam
LDPE mulch
V4-05, 60 DAT

9. Percent Purple Nutsedge Control by MB Alternative Systems
Percent Purple Nutsedge Control by MB Alternative Systems. Ponder, Spring 2007.
99a
93 a
Plots were 1 bed by 50 feet, evaluations are at pepper harvest.

10. Percent Purple Nutsedge Control by MB Alternative Systems
Percent Purple Nutsedge Control by MB Alternative Systems. Ponder, Spring 2007.
99a
93 a
82 b
75b
Plots were 1 bed by 50 feet, evaluations are at pepper harvest.

11. Percent Purple Nutsedge Control by MB Alternative Systems
Percent Purple Nutsedge Control by MB Alternative Systems. Ponder, Spring 2007.
81 a
38 b
Plots were 1 bed by 50 feet, evaluations are at pepper harvest.

12. Determine the Economics of the System
3-WAY LDPE ($885 per land acre) VS
Telone + Pic High Barrier ($880 per land acre)

13. Potential MB Alternatives (Multiple crops)
DMDS 79:21 (dimethyl disulfide + pic.) under high barrier mulch VS
Telone II fb chloropicrin fb Vapam (3 WAY) under standard LDPE mulch

14. Percent Purple Nutsedge Control by MB Alternative Systems
Percent Purple Nutsedge Control by MB Alternative Systems. Ponder, Spring 2008.
99 a
99 a
99 a
99a
99a
Plots were 1 bed by 50 feet, evaluations are at pepper harvest. Soil temp 60 F.

15. Percent Purple Nutsedge Control by MB Alternative Systems
Percent Purple Nutsedge Control by MB Alternative Systems. Ponder, Fall 2007.
98a
93ab
87 ab
85 b
70 c
Plots were 1 bed by 50 feet, evaluations are at pepper harvest. Soil temp 93 F.

16. PEST MANGEMENT DEPENDS ON
soil moisture
soil temperature
soil compaction

17. Large Crabgrass Control by MB Alternative Systems. Ponder, Spring 2008.
Plots were 1 bed by 50 feet, evaluations are at pepper harvest. Soil temp 93 F.

18. 3-WAY
LDPE
DMDS + Pic
Blockade

19. Livid Amaranth Control by MB Alternative Systems. LTF, Spring 2008.
Plots were 1 bed by 50 feet, evaluations are at pepper harvest. Soil temp 93 F.

20. Comparing MB Alternatives
DMDS WAY MIDAS
Mulch
Smell
Nutsedge /- +
Annual grasses
Broadleaf weeds
Application Procedure

21. Metam Application with blades 4” apart applying metam 4” deep

22. Comparing MB Alternatives
DMDS WAY MIDAS
Mulch
Smell
Nutsedge /- +
Annual grasses
Broadleaf weeds
Application Procedure
Economics (cost/returns) ? + -

23. Herbicides Available to Compliment the Fumigant Program for Tomato
Preplant: Gramoxone, Roundup, Aim, Goal
PRE: Dual Mag, Devrinol, Sandea,
POST: Sencor, Sandea, Matrix, Select, Poast
Directed: Sencor, Envoke
5. Row Middles: Gramoxone, Envoke, Sandea, Aim, Chateau
6. POST Harvest: Gramoxone or Roundup + Aim

24. Yellow nutsedge plants/A after a spring pepper crop and fall cucumber crop.*
*Long term study with spring pepper and fall cucumber treated with same fumigant each year. Vapam at 25 GPA and Roundup applied between crops.

25. Yellow nutsedge plants/A after a spring pepper crop and fall cucumber crop.*
*Long term study with spring pepper and fall cucumber treated with same fumigant each year. Vapam at 25 GPA and Roundup applied between crops.

26. Yellow nutsedge plants/A after a spring pepper crop and fall cucumber crop.*
*Long term study with spring pepper and fall cucumber treated with same fumigant each year. Vapam at 25 GPA and Roundup applied between crops.

27. Livid amaranth plants/A after a spring pepper crop and fall cucumber crop.*
*Long term study with spring pepper and fall cucumber treated with same fumigant each year. Vapam at 25 GPA and Roundup applied between crops.

28. Livid amaranth plants/A after a spring pepper crop and fall cucumber crop.*
*Long term study with spring pepper and fall cucumber treated with same fumigant each year. Vapam at 25 GPA and Roundup applied between crops.

29. Herbicides Available to Compliment the Fumigant Program for Tomato
Preplant: Gramoxone, Roundup, Aim, Goal
PRE: Dual Mag, Devrinol, Sandea,
POST: Sencor, Sandea, Matrix, Select, Poast
Directed: Sencor, Envoke
5. Row Middles: Gramoxone, Envoke, Sandea, Aim, Chateau
6. POST Harvest: Gramoxone or Roundup + Aim

30. Livid amaranth plants/A after a spring pepper crop and fall cucumber crop.*
*Long term study with spring pepper and fall cucumber treated with same fumigant each year. Vapam at 25 GPA and Roundup applied between crops.

31. When Producing Multiple Crops
Control weeds before and IMMEDIATELY after the crop is produced
*The goal is to eliminate seed or tuber production….you are fighting the SEED BANK

32. Southern Valley Produce
Application Help
Hendrix and Dail
John Mirusso
On Farm Cooperators
Coggins Farms
Lewis Taylor Farms
Southern Valley Produce
Industry
AmVac
Arysta
UPI
Dow Agro
Cooperators