Slide Presentation

TITLE    (click title to view slides)
Weed Management in Cucurbits

AUTHOR
Stanley Culpepper
Extension Weed Specialist
University of Georgia
Tifton, GA

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TABLE OF CONTENTS
  1. Weed Management in Cucurbits
  2. Curcurbits
  3. What’s New - Select Max
  4. Photo
  5. Sinbar - Watermelon
  6. Photo
  7. Sinbar - watermelon injury and pigweed control
  8. Palmer Amaranth Control - 8 WAT
  9. Yellow Nutsedge Control - 8 WAT
  10. Watermelon Harvest - (Total Weight) 1000 lbs/A
  11. Curbit 1.5 pt/A PRE
  12. Curbit 1.5 pt/A + Sinbar 2.5 oz
  13. Curbit 1.5 pt/A + Sinbar 6 oz
  14. Summary - Watermelon
  15. Cantaloupe - Sinbar
  16. Cantalope Injury - 5 WAT
  17. Cantaloupe Runner Length - 5 WAT
  18. Summary
  19. Sinbar Carryover
  20. Sinbar Watermelon
  21. Photo
  22. Alanap Going Away - Spring 2008
  23. Alanap: Weed Controlled
  24. Photo
  25. Curbit vs Curbit followed by Alanap
  26. Sandea
  27. Sandea Labeled for Watermelon
  28. Nontreated vs Sandea 0.5 oz/A
  29. Sandea
  30. Sandea for PRE Weed Control
  31. Non-treated vs Sandea 0.5 oz/A PRE
  32. No herbicide vs Sandea PRE
  33. Sandea for POST Weed Control
  34. Curbit
  35. Curbit
  36. Cucumber Injury from Curbit
  37. Over mulch, washed off vs Under Mulch
  38. Over mulch, washed off vs Under Mulch
  39. Recommend 1 pt if seeded bareground
  40. Amount of Curbit remaining on plastic mulch.
  41. Herbicide/Mulch Relations
  42. Amount of paraquat remaining on plastic mulch.
  43. Amount of glyphosate remaining on plastic mulch.
  44. Halosulfuron dissipation on mulch
  45. Non-treated vs Sandea prior to transplant
  46. Aim dissipation from mulch
  47. New Herbicide for Watermelons - 2010?
  48. Percent watermelon injury from Reflex - Bareground System
  49. Photo
  50. Percent watermelon injury from Reflex - Mulched System
  51. Carryover from Reflex applied under mulch.
  52. Comments or Questions?



SLIDE CONTENTS
  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
  5. 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
  7. Sinbar – watermelon injury and pigweed control Watermelon Injury Pigweed Control
  8. Palmer Amaranth Control 8 WAT
  9. Yellow Nutsedge Control 8 WAT
  10. Watermelon Harvest (Total Weight) 1000 lbs/A
  11. Curbit 1.5 pt/A PRE
  12. Curbit 1.5 pt/A + Sinbar 2.5 oz
  13. Curbit 1.5 pt/A + Sinbar 6 oz
  14. 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%
  15. 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
  16. Cantalope Injury 5 WAT
  17. Cantaloupe Runner Length 5 WAT
  18. 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
  19. 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.”
  20. 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
  22. 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
  23. common ragweed chickweed common cocklebur purslane common lambsquarters white mustard pigweeds smartweeds Alanap: Weeds Controlled Production of this herbicide has ceased; 2 yrs of inventory
  24. Non-treated
  25. Curbit Curbit followed by Alanap
  26. Sandea PRE/POST to crop: cucumber and cantaloupe Row middle only: squash PRE and row middle: watermelon
  27. 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.
  28. Nontreated Sandea (0.5 oz/A) Watermelon farm in Crisp County, May 2000. Treatment at 1-leaf. Pictures to scale.
  30. 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
  31. Non-treated Control Sandea (0.5 oz/A) PRE W1-00. Halosulfuron study with Ken Lewis in Cordele.
  32. Sandea PRE No herbicide
  33. 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
  34. Curbit Curbit is labeled for many cucurbits, Sonalan is not
  35. Curbit Curbit is labeled, Sonalan is not Do not apply under mulch
  36. Cucumber Injury from Curbit
  37. Over mulch, washed off Under mulch
  38. Over mulch, washed off Under mulch
  39. Recommend 1 pt if seeded bareground. If not contacting the crop (row middle or mulch) can go up to 3 pts
  40. Amount of Curbit remaining on plastic mulch. TyTy GA, 2005. percent days Grey
  41. Herbicide/Mulch Relations
  42. Amount of paraquat remaining on plastic mulch. TyTy GA, 2005. percent days Grey
  43. Amount of glyphosate remaining on plastic mulch. TyTy GA, 2005. percent days Grey
  44. Halosulfuron dissipation on mulch
  45. Non-treated Sandea prior to transplant
  46. Aim dissipation from mulch
  47. New Herbicide for Watermelons – 2010? Preplant or PRE application of Reflex SEVERE INJURY IF APPLIED TO EMERGED PLANTS
  48. Percent watermelon injury from Reflex. Bareground System. Reflex pre-transplant applied 16 oz/A.
  50. Percent watermelon injury from Reflex. Mulched System. Reflex applied 16 oz/A over mulch. Half inch irrigation prior to transplant.
  51. Carryover from Reflex applied under mulch. Crops planted 6 months later. 2007 % injury
  52. Comments or Questions?