A Look Back at the 2003 Weed Control Year in Peanut

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Presentation transcript:

A Look Back at the 2003 Weed Control Year in Peanut Eric P. Prostko Extension Weed Specialist GCPA December 2003

The 2003 GA Peanut Crop According to latest USDA reports….. harvested acres at 535,000 (up 6%) 3400 lbs/A average yield (the best ever!) 1984 (3375 lbs/A)

Topics for Discussion rainfall Valor Florida pusley tropical spiderwort eclipta copperleaf groundcherry glyphosate mishaps

Tifton Rainfall April-August 2003

Valor Update Less injury than expected 2001: 51 WDG 2002-03: 51 WP 2004: Valor SX 51WDG * smaller particles * dispersing agents * easier to get into suspension 10% price reduction in 04’

Valor Injury - 2003 Pulaski County

Peanut yield response to Valor (3 ozs/A) formulation and timing. Attapulgus P = 0.80 CV = 12

Florida pusley Why??? extreme measures 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

Tropical Spiderwort

Eclipta Strongarm, Valor, Basagran Does well in wet, cool conditions should not be a problem in peanuts Strongarm, Valor, Basagran

Hophornbeam copperleaf western counties more on roadsides easily controlled with Strongarm, Valor, and Ultra Blazer

Groundcherry 3 common species little information is known cutleaf 3 common species cutleaf (annual) smooth (perennial) clammy (perennial) little information is known cutleaf control Dual/Outlook Ultra Blazer SWSS SWSS

Glyphosate Mishaps in Peanut!

Roundup WeatherMax vs. Crop Oil

University of Georgia Extension Weed Science (gaweed.com)