Project Summaries

12-149AR  Project Manager: P. F. O'Leary

EVALUATION OF THE EFFECTS OF INSECTICIDE-HERBICIDE INTERACTIONS ON YIELD AND MATURITY OF ARKANSAS COTTON

Gus M. Lorenz, University of Arkansas-Coop Extension

Our results suggest that thrips populations increase after the application of Dual Magnum herbicide, and that there may be some interaction between the insecticide seed treatment and herbicide application.  Gaucho seed treatments exhibited greater control vs. Cruiser seed treatments before the application of Dual Magnum herbicide, but showed the largest jump in thrips numbers after the application.  The combination of Cruiser and Gaucho treatments together exhibited no greater control than either product used alone.  Necrosis seemed to correlate with larger thrips populations.  There are many different factors that can cause this increase in thrips populations such as planting date, weather patterns, loss of active ingredient, herbicide injury, plant stress, as well as antagonism.  In order to make conclusions on efficacy changes of seed treatments after the application of an herbicide, more tests must be conducted. Trials will be planted and observed in the 2013 growing season.  Different insecticide seed treatments as well as different herbicide systems will be tested.

 

Project Year: 2012
 

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