title: Oral toxicity of abamectin, boric acid, fipronil, and hydramethylnon to laboratory colonies of Argentine ants (Hymenoptera: Formicidae).
abstract: 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 x 10(-5)% fipronil and 0.1% hydramethylnon provided complete mortality of L. humile workers baited for 24 h. Baits containing 1 x 10(-4) and 1 x 10(-5)% fipronil provided 100% kill of queens. In the continuous baiting, 0.5% boric acid, 1 x 10(-6)% fipronil, and 0.025% hydramethylnon provided 100% mortality of workers. The queens and workers provided baits containing 1 x 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.
authors.affiliation: Department of Entomology, University of California, Riverside 92521, USA.
authors.forename: L M
authors.initials: LM
authors.lastname: Hooper-Bui
authors.forename: M K
authors.initials: MK
authors.lastname: Rust
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001000:Ants; D001118:Argentina; D001888:Boric Acids; D007306:Insecticides; D007559:Ivermectin / Q000031:analogs & derivatives*; D011720:Pyrazoles; D011744:Pyrimidinones; D013997:Time Factors
chemical_list: D001888:Boric Acids; D007306:Insecticides; D011720:Pyrazoles; D011744:Pyrimidinones; C048324:abamectin; D007559:Ivermectin; C041642:hydramethylnon; C082360:fipronil; C032688:boric acid