Jarrod T. Hardke1, Gus Lorenz1, Kyle Colwell1, Craig Shelton1, and Richard Edmund2. (1) University of Arkansas Cooperative Extension Service, P.O. Box 391, S. University Ave., Little Rock, AR 72203, (2) DuPont Crop Protection, 8295 Tournament Drive, Suite 300, Memphis, TN 38125
In 2006, Rynaxypyr™ was evaluated in three studies in Jefferson County, Arkansas for control of heliothines. In the first trial, Ryanxypyr™ was applied at different rates to conventional non-bt cotton in comparison with Tracer (spinosad), Tracer and Capture (bifenthrin) tank mixed, and a Bollgard II variety. Significant differences were observed among treatments in regard to seasonal total damage and seasonal total larvae. In the second trial, Rynaxypyr™ was applied at different rates to Bollgard cotton in comparison with Asana XL (esfenvalerate), Capture and Orthene (acephate) tank mixed, Capture alone, and Tracer and Capture tank mixed. Significant differences were observed only between treatments and the untreated check. In the third trial, Rynaxypyr™ was applied at a single rate in comparison with Experimental 1, Larvin (thiodicarb), Tracer, Tracer and Capture tank mixed, Denim (emamectin benzoate), and Steward (indoxacarb). Significant differences were observed among treatments in regard to seasonal total damage, seasonal total larvae, and yield.
