title: Relative potency of Bacillus thuringiensis var. israelensis and Bacillus sphaericus 2362 for Mansonia titillans and Mansonia dyari.
abstract: Bacillus thuringiensis var. israelensis (B.t.i.), HD-968-S-1983, and a primary powder of Bacillus sphaericus 2362 were assayed against Mansonia titillans and Ma. dyari. The susceptibility of the 2 species to the individual bacterial toxins was similar. The B.t.i. LC50 values were 50.5 micrograms/liter for Ma. dyari and 54.7 micrograms/liter for Ma. titillans; the B. sphaericus LC50 values were 339.0 micrograms/liter and 347.2 micrograms/liter, respectively. The log dose-probit mortality lines were parallel for both target species. The potency of B. sphaericus relative to B.t.i. was 0.15 for Ma. dyari and 0.16 for Ma. titillans.
authors.affiliation: U.S. Department of Agriculture, Agricultural Research Service Insects Affecting Man and Animals Research Laboratory, Gainesville, FL 32604.
authors.forename: J C
authors.initials: JC
authors.lastname: Lord
authors.forename: T
authors.initials: T
authors.lastname: Fukuda
mesh_terms: D000818:Animals; D001407:Bacillus; D001413:Bacillus thuringiensis; D009033:Culicidae / Q000382:microbiology*; D004463:Ecology; D007814:Larva / Q000382:microbiology; D010572:Pest Control, Biological; D013045:Species Specificity