Comprehensive laboratory baiting studies with the 4 insecticides abamectin, boric acid, fipronil, and hydramethylnon were conducted against Argentine ant, Linepithema humile (Mayr). Serial dilutions of each insecticide prepared in a 25% sucrose solution were provided for 24 h or 14 d to groups of workers and queens. Sucrose–water baits containing 1 × 10−5% fipronil and 0.1% hydramethylnon provided complete mortality of L. humile workers baited for 24 h. Baits containing1 × 10−4 and 1 × 10−5% fipronil provided 100% kill of queens. In the continuous baiting, 0.5% boric acid, 1 × 10−6% fipronil, and 0.025% hydramethylnon provided 100% mortality of workers. The queens and workers provided baits containing 1 × 10−5% fipronil and 0.5% boric acid all died within 14 d. Low concentrations of fipronil and boric acid in sucrose may be promising candidates for Argentine ant control.
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1 June 2000
Oral Toxicity of Abamectin, Boric Acid, Fipronil, and Hydramethylnon to Laboratory Colonies of Argentine Ants (Hymenoptera: Formicidae)
Linda M. Hooper-Bui,
Michael K. Rust
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Journal of Economic Entomology
Vol. 93 • No. 3
June 2000
Vol. 93 • No. 3
June 2000
ants
bait
insecticides
Linepithema humile
toxicity