Field evaluation of three granular baits against multiple ant species including Brachymyrmex sp. and Nylanderia sp. nr. pubens (Hymentopera: Formicidae) in an urban/industrial environment (NASA)

Field trials were initiated to investigate the efficacy of three granular baits against ant species commonly found in urban/industrial environments in Texas. Pre-treatment counts indicated that at least seven species of ants were present including Brachymyrmex sp. and N. sp. nr. pubens. Active ingredients included in this trial were Abamectin, hydramethylnon, and hydramethylnon/S-methoprene. Applications of each of the three baits were made in accordance with each manufacturer’s label. Baits were applied in a 30’ band around each structure in the study. All treatments and controls were replicated four times each for a total of 16 replications. Pre and post-treatment evaluation methods included a set of baited vials with a sucrose and a protein source located at each of the four corners of each structure. Vials were deployed and retrieved after a period of 1 hr. Post-treatment sampling was performed at 2 wks and then monthly for 5 months. At the 2 wk post-treatment count only four species of ants were collected including Brachymyrmex sp. and N. sp. nr. pubens.