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Watermelon Update

Watermelon Update. GFVGA Annual Meeting. Watermelon Weed Management. Strategy Sandea Pigweed control Nutsedge control Morningglory control. Strategy. cucumbers, melons, squash and watermelons contains 1.6 lb ethalfluralin (Curbit) and 0.5 lb clomazone (Command) per gallon. Curbit.

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Watermelon Update

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  1. Watermelon Update GFVGA Annual Meeting

  2. Watermelon Weed Management • Strategy • Sandea • Pigweed control • Nutsedge control • Morningglory control

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

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

  5. 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.

  6. 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

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

  8. 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.

  9. 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

  10. Gowan Company & Possible preemergence label for watermelon

  11. Watermelon Label -- Row middle application, 2003 • WILL NOT ALLOW POST APPLICATION • Possible PRE label in 2004 Cooperative work with Ken Lewis, Crisp Co. and Tom Jennings, Wilcox Co.

  12. Nontreated Sandea (0.024 lb ai/A) Watermelon farm in Crisp County, May 2000. Treatment at 1-leaf. Pictures to scale.

  13. 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

  14. Pigweed Control by Sandea • 0.67 oz PRE = 90 to 100%

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

  16. Nutsedge Control by Sandea • 0.67 oz PRE = 65-80% for about 3 wk

  17. No herbicide Sandea PRE

  18. 15 DAT non-treated Sandea 2/3 oz + Curbit 1.5 pt

  19. Pigweed Management

  20. Pigweed Management • 1) Curbit preemergence • 2) Strategy preemergence • Alanap preemergence or postemergence • Treflan row middle

  21. a a a b b % control Pigweed Response to Watermelon Herbicide Systems at 26 DAT. Crisp/Wilcox Co. 2002. Curbit, 1.5 pt/A; Strategy, 3 pt/A; Sandea 0.75 oz/A; Alanap 5 qt/A.

  22. Pigweed Response to Watermelon Herbicide Systems at 42 DAT. Crisp/Wilcox Co. 2002. a a a b c % control Curbit, 1.5 pt/A; Strategy, 3 pt/A; Sandea 0.75 oz/A; Alanap 5 qt/A.

  23. Reduction of Herbicide Control Tillage that disrupts herbicide layer will reduce control drastically

  24. Morningglory and Nutsedge • Sandea row middle for nutsedge • Tillage and competitive crop

  25. Read Labels • Sandea carryover or tank clean out issues • Command or Strategy buffer requirements

  26. Gowan Company &

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