Insecticide Evaluation for Control of the Red Imported Fire Ant, 1989

Abstract

The study utilized 32 plots of approximately %-acre size in a randomized complete block design with 4 replications of 8 treatments. Prior to initiation, fire ant mounds (both single and multiple queen colonies present) were counted and marked with 12-inch garden stakes in each plot. A centrally located Vi-acre circle was designated in each plot for fire ant population monitoring. The study began 15 Aug 1989 in a 30-acre field at the LSU St. Gabriel Research Station in Iverville Parish, LA. Applications were initiated on 1 Sep and were completed on 11 Sep. Tralomethrin and Lorsban were applied to individual mounds using a solo backpack sprayer (14 psi), 1 pt of finished formulation sprayed over the surface of each mound. Amdro and Fortress individual mound treatments were applied using 1-qt "shaker" jars with holes in the lids. Amdro and Dursban broadcast treatments were applied using a cyclone spreader. Bengal Fire Ant Killer (tralomethrin 0.3 EC) broadcast treatments were applied with a tractor-sprayer (40 psi). After treatment, each mound was designated with a painted stake for further monitoring. Counts for population monitoring and % control were made on 12 Oct and 9 Nov.