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Tropical Spiderwort Control in Peanut, Corn, and Soybean

AUTHOR
Eric P. Prostko
Extension Weed Specialist
University of Georgia
Tifton

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TABLE OF CONTENTS
  1. Tropical Spiderwort Management in Peanut, Corn, and Soybean
  2. Control Strategies in Peanut
  3. Peanut Photo
  4. Tropical spiderwort control in peanut as influenced by row spacing
  5. Tropical spiderwort control in peanuts with Dual Magnum applied preemergence, Grady Co., 2003.
  6. Tropical spiderwort control with Gramoxone Max + Dual Magnum Tank-Mixes
  7. Gramoxone Max + Dual Magnum Photos
  8. How much Dual Magnum can we use?
  9. Other Metolachlor Formulations
  10. Strongarm in Peanut
  11. Tropical spiderwort control in peanuts with Strongarm @ 0.45 ozs/A, Grady Co., 2003.
  12. Tropical spiderwort control with POST applied Strongarm, 2003
  13. Gramoxone Max and Cadre: Tank-Mixed or Split Applications?
  14. Tropical spiderwort control with Gramoxone Max and Cadre
  15. Cadre Photos
  16. What About Cadre + Dual Combos?
  17. Tropical Spiderwort Control with Cadre + Dual Magnum
  18. Valor
  19. Tropical spiderwort control in peanuts with Valor applied preemergence, Grady Co., 2003.
  20. Tropical spiderwort in Field Corn
  21. Tropical spiderwort in Soybeans
  22. Post-Harvest Control Strategies
  23. Tropical spiderwort control with various herbicides - 14 DAT
  24. Tropical Spiderwort in Australia



SLIDE CONTENTS
  1. Tropical Spiderwort Management in Peanut, Corn, and Soybean Eric P. Prostko Extension Weed Specialist Dept. Crop & Soil Sciences University of Georgia Tifton
  2. Control Strategies in Peanut row spacing * twins vs. singles residuals * Dual Magnum * Strongarm POST’s * Gramoxone Max * Cadre * Basagran
  4. Tropical spiderwort control in peanut as influenced by row spacing Source: Yoder et al. 2003 (FL) a b
  5. Tropical spiderwort control in peanuts with Dual Magnum applied preemergence, Grady Co., 2003. Dual Magnum 7.64EC @ 1.33 pts/A
  6. Tropical spiderwort control with Gramoxone Max + Dual Magnum Tank-Mixes Gramoxone Max @ 5.5 ozs/A + Dual Magnum @ 1.33 pts/A Grady County
  7. A B Tropical spiderwort control in peanuts. A = untreated; B = Gramoxone Max + Dual Magnum applied 17 DAP. Photos taken 49 DAP.
  8. How much Dual Magnum can we use? 1-1.33 pt/A 2.8 pts/year 90 day PHI cost/A $90/gal $31.50/2.8 pts
  9. Other Metolachlor Formulations Cinch Dupont same as Dual II Magnum cannot use POST Stalwart C Sipcam Agro USA Inc. “old” Dual EC formulation (7.8 lbs/gal) not labeled for peanut Me-Too-Lachlor Drexel “old Dual EC formulation (8 lbs/gal) rates are too low
  10. Strongarm in Peanut PPI or PRE thru cracking* not labeled for POST use at this time but working on this issue * cracking = soil displaced by germinating seedlings just prior to emergence
  11. Tropical spiderwort control in peanuts with Strongarm @ 0.45 ozs/A, Grady Co., 2003. PRE = 5 DAP EPOST = 17 DAP (2”, 3 leaf) LPOST = 31 DAP (up to 6”) a ab a ab cd b abc c e
  12. Untreated Strongarm applied 17 DAP Strongarm applied 31 DAP PE-24-03 46 DAP Tropical spiderwort control with POST applied Strongarm, 2003
  13. Gramoxone Max and Cadre Tank-Mixed or Split Applications?
  14. Tropical spiderwort control with Gramoxone Max and Cadre Tank-mix applied 17 DAP/Split applied 17 and 31 DAP (LSD 0.05 = 11) (LSD 0.05 = 15) (LSD 0.05 = 22)
  15. Tropical spiderwort control in peanuts. A = untreated; B = Cadre applied 7 DAP. Photos taken 49 DAP. A B
  16. What About Cadre + Dual Combos?
  17. Tropical Spiderwort Control with Cadre + Dual Magnum 114 DAP LSD 0.05 = 22
  19. Tropical spiderwort control in peanuts with Valor applied preemergence, Grady Co., 2003. Valor 51 WP @ 3 ozs/A
  20. Tropical Spiderwort in Field Corn * preemergence Dual II Magnum Atrazine (?) * postemergence 2,4-D Basagran * post-directed Gramoxone Max Aim Evik
  21. Tropical Spiderwort in Soybeans * narrow rows * preemergence Sencor Dual Magnum Boundary Canopy SP Canopy XL * postemergence Basagran * post-directed Gramoxone Max
  22. Post-Harvest Control Strategies prevent seed production re-growth after harvest time before first frost Gramoxone Max 2,4-D tillage
  23. Tropical spiderwort control with various herbicides - 14 DAT Applied October 31, 2003 6” tall spiderwort LSD 0.05 = 13
  24. Tropical Spiderwort in Australia Weed problem for 20-30 years control in other crops important corn 2,4-D Dual peanut Pursuit Dual 2,4-D E.P. with Australian peanut farmer, Wayne Learmonte