New and Emerging Weed Problems HADSS Eric Prostko
New and Emerging Weed Problems & HADSS Eric Prostko Extension Weed Specialist University of Georgia Southern Peanut Grower’s Conference, 2004
New or Emerging Weed Problems • Weed shifts • Some we know a lot about, some we don’t • Why does this occur? – Changes in tillage – changes in herbicide use patterns
Tropical Spiderwort • row spacing * twins vs. singles • residuals * Dual Magnum • POST’s * Gramoxone Max * Cadre * Basagran * Pursuit * Strongarm
Tropical spiderwort How bad is it? ? ? Grady County, GA (2004)
Florida Pusley • Why? ? ? – – – No DNA used lack of activation tie up on residue untimely POST’s the R word? • extreme measures • Prowl, Sonalan, Dual Magnum, Strongarm, and Valor • Gramoxone Max
Groundcherry • 3 common species cutleaf – cutleaf (annual) – smooth (perennial) – clammy (perennial) • little information is known • cutleaf control – Dual/Outlook SWSS – Strongarm/Valor? – Ultra Blazer SWSS
Hophornbeam copperleaf • western counties • more on roadsides • easily controlled with Strongarm, Valor, and Ultra Blazer
Eclipta • Does well in wet, cool conditions • should not be a problem in peanuts • soil-applied – Strongarm, Valor, Spartan • postemergence – Basagran. Blazer, Storm
Carpetweed SWSS • Not very competitive? • Soil-applied – Prowl, Sonalan, Dual, Strongarm, Spartan • postemergence – from Grichar SWSS – – – 2, 4 -DB (58%) Cadre (80%) Storm (95%) Basagran (33%) Blazer (100%)
Purple Moonflower • • Limited data paraquat + Storm Ultra Blazer Cadre (? ? ? ) SWSS
Pink Purslane • Limited data • soil-applied – Sonalan, Prowl, Dual, Valor • postemergence – paraquat + Storm or Basagran – Basagran, Blazer, Storm, 2, 4 -DB
Spurges • Several species – hyssop, spotted, prostrate, nodding • limited data • Valor • Ultra Blazer • Storm
HADSS Herbicide Application Decision Support System • First released in 1988 as HERB (DOS) • 1997 became HADSS (Windows) • Computer assisted herbicide decisions – postemergence • Web-based version is free • Can be purchased for $95 • time input for scouting and data entry • http: //www. hadss. com
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