2003 Vegetable Herbicide Update

1. 2003 Vegetable Herbicide Update GFVGA Annual Meeting

2. New Vegetable Herbicides for 2003 Roundup WeatherMax Select Strategy Matrix Command Sandea

3. USDA USDA ARS CSREES Commodity Food Producers Processors SAES EPA IR - 4 Consumers AGRICHEMICALS INDUSTRY http://www.cook.rutgers.edu/~ir4 THE IR-4 PROJECT INTERREGIONAL RESEARCH PROJECT NO. 4 THE MINOR USE PROGRAM Funding provided by USDA (CSREES and ARS) and the SAES

4. New Vegetable Herbicides for 2003 Roundup WeatherMax Select Strategy Matrix Command Sandea

5. Roundup WeatherMax Replacing Roundup UltraMax Potassium salt 5.5 lb salt/gal; 4.5 lb ae/gal 30-min rainfree warranty Claim better activity under marginal conditions Better bulk handling characteristics

6. Eggplant Green pea Garlic Irish potato Kale Lettuce Lima bean Mustard Okra Onion Pepper Pole bean Snap bean Southern pea Sweet potato Turnip Broccoli Cabbage Cauliflower Celery Collard Dry bean Roundup WeatherMaxRow Middle Application Apply as hooded spray, shielded spray, or wiper application in row middles.

7. New Vegetable Herbicides for 2003 Roundup WeatherMax Select Strategy Matrix Command Sandea

8. Select Collard, kale, mustard, turnip Control of annual and perennial grasses Apply 6 to 8 fl oz per acre Add 1% crop oil concentrate to mix

9. New Vegetable Herbicides for 2003 Roundup WeatherMax Select Strategy Matrix Command Sandea

10. Strategy • cucumbers, melons, squash and watermelons • contains 1.6 lb ethalfluralin (Curbit) and 0.5 lb clomazone (Command) per gallon

11. Curbit • removed from the market???? • replaced with Strategy

12. Strategy Soil Broadcast Amount of Amount of Texture Rate Curbit Command Coarse 2-3 pt 1-1.5 pt 0.33-0.5 pt Medium 3-4 pt 1.5-2 pt 0.5-0.67 pt Fine 4-6 pt 2-3 pt 0.67-1 pt Georgia use rate for most fields should be 2-3 pt/A.

13. Strategy • DO NOT incorporate prior to planting • DO NOT apply under or OVER row covers, mulches, or other plant covers • Beware of the potential for heavy rain • Do not make broadcast applications to transplants

14. Watermelon Injury from Strategy Applied Topical 1 wk After Transplant

15. Strategy • Apply prior to weed emergence • Apply to seeded crop prior to emergence, or apply as a banded spray between rows after crop emergence or transplanting.

16. Strategy • Should be able to obtain same rate of ethalfluralin (Curbit). • Command should enhance activity of annual grasses (expect Texas panicum), sida, croton, lambsquarters. • Buffer restrictions are identical to Command applied alone • Be aware of carryover from clomazone

17. New Vegetable Herbicides for 2003 Roundup WeatherMax Select Strategy Matrix Command Sandea

18. Matrix Herbicide • Active is rimsulfuron, DuPont product • Apply in field grown tomato • Apply 1 to 2 oz of product after at least two leaves • Add nonionic surfactant

19. Tomato Response to Matrix applied PRE and POST. TyTy, 2002. % injury

20. Matrix Weed Control • Specific use herbicide: Annual bluegrass Large crabgrass Foxtails Fall panicm Cocklebur* Lambsquarters* Morningglory* Hairy Nightshade* Wild mustard Redroot pigweed Common purslane Wild radish *Label suggest only suppression of these weeds.

21. New Vegetable Herbicides for 2003 Roundup WeatherMax Select Strategy Matrix Command Sandea

22. Command 3 ME Labels 2003 • cucumber (0.4 to 1.0 pt) apply after seeding or just prior to transplanting • melons - musk and watermelon (0.4 to 0.67 pt/A) apply after seeding or just before transplanting • lima bean, snap bean, pole bean, southern pea (0.47 to 0.67 pt) – apply after seeding.

23. Command 3 ME Labels Be Aware of the Buffer Restrictions and Potential Off-Target Movement

24. New Vegetable Herbicides for 2003 Roundup WeatherMax Select Strategy Matrix Command Sandea

25. Sandea 1) cucumber, cantaloupe, tomato 2) row middle for pepper, eggplant, squash, watermelon, pumpkin* 3) preemergence in succulent snap bean* *Label anticipated in near future.

26. Sandea - Cucumber and Cantaloupe(Section 3 Label Soon)* • No Plastic: • 0.5 to 0.75 oz applied after planting prior to soil cracking or apply and wait at least 7 d prior to transplant. • 0.5 to 0.75 oz POST after the crop has reached the 3-5 true leaf stage, but before flowering. • 0.5 to 0.75 oz POST no sooner than 14 d after transplant. • Plastic: • 0.5 to 0.75 oz following final bed shaping and just prior to laying plastic. Do not transplant or seed for at least 7 d after treatment.

27. Cucumber Injury Symptoms from Sandea Applied POST

28. Sandea - Cucumber and Cantaloupe(Section 3 Label Soon)* • Postemergence application can slow growth of vines • Cantaloupe seems to be more sensitive than cucumber

29. Cucumber Response to Sandea Applied Topical. TyTy, 2002.* % stunting *Cucumber was in the 3-leaf stage at time of application.

30. Cantaloupe Response to Sandea Applied Topical. Cordele, 2002.* % stunting *Cantaloupe was 6 inches at time of application.

31. However,no documented yield loss at this time

32. Sandea - Tomato(Section 3 Label) • 0.5 to 0.75 oz following final bed shaping and just prior to laying plastic. Do not transplant for at least 7 d after treatment. • 0.5 to 0.75 oz POST no sooner than 14 d after transplant. Directed application suggested.

33. Sandea - tomato(Section 3 Label)* • 5 trials conducted in GA during 2000, 2001, 2002. • No visual injury • No maturity effect • No yield effect • No grade effect Cooperative work with Joel Hudgins, Decatur County.

34. Row Middle Applications(Section 3 Label)* • Fruiting vegetables including pepper and eggplant • Cucurbit vegetable group including cantaloupes, melons, cucumbers, squash, pumpkins, watermelon *Label anticipated in near future.

35. Sandea for PRE Weed Control common cocklebur wild radish pigweeds common ragweed common lambsquarters yellow nutsedge - suppression purple nutsedge - suppression 2 to 3 weeks residual weed control

36. Sandea for POST Weed Control 1-3 inch 1-9 inch passionflower cocklebur redroot pigweed ragweed pokeweed velvetleaf yellow and purple nutsedge – heavy infestations may require sequential applications 2 to 3 weeks residual weed control

37. Pigweed Control by Sandea • 0.67 oz PRE = 90 to 100% (tillage that disrupts herbicide layer will reduce control drastically) • 0.5 to 0.75 oz POST = • 85 to 100% for 0 to 2.5 inch tall • control goes downhill fast after 3” tall

38. Non-treated Control Sandea (0.5 oz/A) PRE W1-00. Halosulfuron study with Ken Lewis in Cordele.

39. Non-treated Control Sandea (0.5 oz/A) POST 2-leaf watermelon, 2” Palmer W1-00. Halosulfuron study with Ken Lewis in Cordele.

40. Nutsedge Control by Sandea • 0.67 oz PRE = 65-80% for about 3 wk • less control if applied under plastic • 0.5 to 0.67 oz POST = 85 to 95% plus some residual

41. No herbicide Sandea PRE

42. Non-treated control Sandea (0.5 oz/A) 2 WAP

43. If Sandea is applied under drought stressIT WILL NOT WORK

44. Sandea Label Recommendations • Row Middle: • avoid unnecessary contact with crop • Application Info: • apply in a minimum of 15 GPA • do not use more than 2 oz per acre • use non-ionic surfactant for POST weed control • do not apply using air assisted (air blast) systems • do not apply through irrigation • do not apply when soil organophosphate insecticides are used

45. Carryover – Read Label • 12 to 18 months • cabbage, radish, carrot, broccoli, cauliflower, collards, onion • 24 months • spinach

46. Tank Clean Out is Essential Colquitt County, 2002, Glenn Beard.

47. Gowan Company &