Slide Presentation

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

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TABLE OF CONTENTS
  1. Adjusting Herbicide Programs to Emerging Weed Problems in Peanut
  2. Why do "new" weed problems occur?
  3. New or Unique Weed Problems in Peanuts
  4. Tropic Croton (Croton glandulosus)
  5. Dayflower/Spiderwort (Commelina spp.)
  6. Tropical spiderwort
  7. Residual Spiderwort Control in Peanuts with Dual Magnum, Brooks County, GA
  8. Eclipta (Eclipta prostrata)
  9. Eclipta Control in Peanuts with POST Herbicides
  10. Hophornbeam Copperleaf (Acalypha ostryifolia)
  11. Hophornbeam Copperleaf Control: Randolph County, GA - 2001
  12. Spiderflower (Cleome spp.)
  13. Redweed (Melochia corchorifolia)
  14. ALS-Resistant Palmer Pigweed
  15. Summary
  16. UGA Extension Weed Science



SLIDE CONTENTS
  1. Adjusting Herbicide Programs to Emerging Weed Problems in Peanut Eric P. Prostko Extension Weed Specialist University of Georgia
  2. Why do “new” weed problems occur? reliance on herbicides decreases in cultivation ecological shifts herbicide resistance
  3. New or Unique Weed Problems in Peanuts tropic croton dayflower/spider-wort eclipta copperleaf spiderflower redweed ALS-resistant pigweed
  4. Tropic Croton (Croton glandulosus) 3rd most troublesome weed Cadre is weak not as competitive as other weeds PRE - Valor or Strongarm POST - Ultra Blazer Cadre/Blazer tank/mixes???
  5. Dayflower/Spiderwort (Commelina spp.) Berrien, Brooks, Grady, Thomas limited data Roundup is weak PRE - Dual (timing) POST - Basagran others???? Asiatic spreading spiderwort
  6. Tropical spiderwort, Cairo, GA, 2001
  7. Residual Spiderwort Control in Peanuts with Dual Magnum, Brooks County, GA Dual Magnum @ 1 pt/A Applied: July 2, 2001 Rated: August 1, 2001 b a
  8. Eclipta (Eclipta prostrata) low, moist areas limited biology data PRE - Strongarm, Valor, Dual, Outlook POST - Basagran, Storm, Tough timing is critical
  9. Eclipta Control in Peanuts with POST Herbicides Grichar, 1997
  10. Hophornbeam Copperleaf (Acalypha ostryifolia) Randolph, Terrell limited biology data PRE - Valor or Strongarm POST - Ultra Blazer, Storm
  11. Hophornbeam Copperleaf Control Randolph County, GA - 2001 6 WAT Untreated Strongarm Valor
  12. Spiderflower (Cleome spp.) Laurens County limited data PRE - Pursuit POST - Pursuit, Cadre, Ultra Blazer (bloom stage)
  13. Redweed (Melochia corchorifolia) low, moist areas hard seed coat season long germination PRE - Strongarm, Valor, Zorial POST - Basagran, Storm, Cadre
  14. ALS-Resistant Palmer Pigweed Burke County 2001 do not use Cadre, Pursuit, Classic, Strongarm Prowl, Sonalan, Dual, Valor, Ultra Blazer, Storm
  15. Summary Newer soil applied herbicides will help control some of the unique weed problems. Combinations of PRE and POST treatments will provide consistent control. Need more information about biology and competitiveness of newer weed problems in order to make better control decisions.
  16. University of Georgia Extension Weed Science (gaweed.com)