Evaluation of broadcast applications of various contact insecticides against red imported fire ants, Solenopsis invicta Buren

摘要

The efficacy of permethrin, bifenthrin, deltamethrin, and fipronil was compared with various rates and formulations of imidacloprid and cyfluthrin against Solenopsis invicta Buren (Hymenoptera: Formicidae), red imported fire ants (RIFAs). Efficacy was determined by collecting foraging RIFAs from each plot. Estimated percent reduction was 86, 61, and 40 for granular imidacloprid, granular cyfluthrin and the 9.55 L/ha (130.7 oz/acre) liquid cyfluthrin/imidacloprid formulation, at 1 day after treatment (DAT), respectively. By 65 DAT only the granular fipronil treated plots had statistically significant (alpha = 0.05) fewer fire ants than the untreated control. Based on these results, the Arkansas Insecticide Recommendations were revised to include fipronil granules for use by Arkansas homeowners for RIFA control.