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Weed Management in Cucurbits

Weed Management in Cucurbits. Curcurbits. Select Max Sinbar Alanap Sandea Curbit Herbicide/Mulch relations. What’s New - Select Max. clethodim – Registered 2006 Select Max 0.97 EC Apply twice the rate of Select 2 EC For Cantaloupe, Cucumber, Squash, and Watermelon use 12-16 fl oz/A

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Weed Management in Cucurbits

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  1. Weed Management in Cucurbits

  2. Curcurbits • Select Max • Sinbar • Alanap • Sandea • Curbit • Herbicide/Mulch relations

  3. What’s New - Select Max • clethodim – Registered 2006 • Select Max 0.97 EC • Apply twice the rate of Select 2 EC • For Cantaloupe, Cucumber, Squash, and Watermelon use 12-16 fl oz/A • Label allows for use of NIS instead of COC

  4. Sinbar - Watermelon • 2 to 3 oz of product applied preemergence • Seeded: make applications after planting but before the crop emergence • Transplants: Apply prior to transplant on bareground. May apply over mulch but ½ inch rainfall must occur following applications. • Now owned by Tessenderlo Kerley, Inc

  5. Sinbar – watermelon injury and pigweed control Watermelon Injury Pigweed Control

  6. Palmer Amaranth Control8 WAT

  7. Yellow Nutsedge Control8 WAT

  8. Watermelon Harvest(Total Weight) 1000 lbs/A

  9. Curbit 1.5 pt/A PRE

  10. Curbit 1.5 pt/A + Sinbar 2.5 oz

  11. Curbit 1.5 pt/A + Sinbar 6 oz

  12. Summary - Watermelon Sinbar at 3 oz/A provided control of: a) Palmer amaranth = 78-89% b) Yellow nutsedge = 26-44% c) Tropic croton = 72-88% Sinbar at 6 oz/A provided control of: a) Palmer amaranth = 95-97% b) Yellow nutsedge = 78-80% c) Tropic croton = 97%

  13. Cantaloupe – Sinbar • Mulch and Bareground All plots received • Treatments (Sinbar applied pre-transplant) • 1) Curbit @ 1 qt/A • 2) Curbit @ 1 qt/A + Sinbar @ 3 oz/A • 3) Curbit @ 1 qt/A + Sinbar @ 6 oz/A

  14. Cantalope Injury5 WAT

  15. Cantaloupe Runner Length5 WAT

  16. Summary Bareground Production - Not a chance Mulch Production - Sinbar did not injury cantaloupe 5 WAT - Sinbar at 6 oz/A reduced runner length 10%, 5 WAT

  17. Sinbar Carryover • There are carryover issues after an application of Sinbar most notably the cole and greens crops. • Sinbar • The label states “Do not replant treated areas to any crop within 2 years after last application as injury to the subsequent crop(s) may result.”

  18. Sinbar Watermelon CARRYOVER RESEARCH IN PROGRESS Label is very restrictive; UGA preliminary results: < 10% damage: sweet corn, squash, wheat, oat, rye, snap bean 1X rate 10 to 40% damage: cabbage, kale, broccoli, collard 2X rate: 40 to 80% damage: cabbage, kale, broccoli, collard

  19. Alanap Going Away – Spring 2008 • Chemtura voluntarily canceling registration • Production was stopped Oct. 2007 • 50,000 gal inventory • 2.5 years of inventory if normal use continues • Shelf life is about 3 years

  20. Alanap: Weeds Controlled common ragweed chickweedcommon cocklebur purslanecommon lambsquarters white mustardpigweeds smartweeds Production of this herbicide has ceased; 2 yrs of inventory

  21. Non-treated

  22. Curbit Curbit followed by Alanap

  23. Sandea • PRE/POST to crop: cucumber and cantaloupe • Row middle only: squash • PRE and row middle: watermelon

  24. Sandea Labeled for Watermelon PREEMERGENCE: 0.75 oz/A Seeded: Apply after planting, before cracking Transplant bareground/mulch: Do not transplant till 7 d after application. *Avoid heavy rain right after application *DO NOT APPLY OVER MULCH and then transplant.

  25. Nontreated Sandea (0.5 oz/A) Watermelon farm in Crisp County, May 2000. Treatment at 1-leaf. Pictures to scale.

  26. 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

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

  28. No herbicide Sandea PRE

  29. 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

  30. Curbit Curbit is labeled for many cucurbits, Sonalan is not

  31. Curbit Curbit is labeled, Sonalan is not Do not apply under mulch

  32. Cucumber Injury from Curbit

  33. Over mulch, washed off Under mulch

  34. Over mulch, washed off Under mulch

  35. Recommend 1 pt if seeded bareground. If not contacting the crop (row middle or mulch) can go up to 3 pts

  36. Amount of Curbit remaining on plastic mulch. TyTy GA, 2005. percent days Grey

  37. Herbicide/Mulch Relations

  38. Amount of paraquat remaining on plastic mulch. TyTy GA, 2005. percent days Grey

  39. Amount of glyphosate remaining on plastic mulch. TyTy GA, 2005. percent days Grey

  40. 65% 6% Halosulfuron dissipation on mulch

  41. Sandea prior to transplant Non-treated

  42. Aim dissipation from mulch

  43. New Herbicide for Watermelons – 2010? Preplant or PRE application of Reflex SEVERE INJURY IF APPLIED TO EMERGED PLANTS

  44. Percent watermelon injury from Reflex. Bareground System. Reflex pre-transplant applied 16 oz/A.

  45. Percent watermelon injury from Reflex. Mulched System. Reflex applied 16 oz/A over mulch. Half inch irrigation prior to transplant.

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