The efficacy of new insecticides and Dipel for Soybean Looper control in soybeans and effects on beneficial insects and arthropods

Abstract

Four trials were conducted in the South Burnett to test the efficacy of three new insecticides (DPX-MP062, RH 2485 and Tracer) and Dipel SC for Soybean Looper, Thaysanoplusia orichalcea (Fabricius), in soybeans. Effects on beneficial insects and arthropods were also assessed. Helicoverpa armigera control by DPX-MP062, Tracer and Dipel was assessed in trials 1 and 2. DPX-MP062 at all rates showed dual looper/Helicoverpa activity and the lower rates showed potential as they had little effect on beneficial species. All insecticides were trialed at several different rates. Cost is an important aspect in chemical application. If loopers can be controlled by insecticides at lower rates application costs can be kept down. Tea Tree Oil was trialed to ascertain its benefits as a moth deterrent. However, there was no further infestation in trial 3 so further investigation is necessary.