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. 1983 Aug;46(2):312-5.
doi: 10.1128/aem.46.2.312-315.1983.

Toxicity of Bacillus thuringiensis subsp. israelensis to adult Aedes aegypti mosquitoes

M J Klowden, G A Held, L A Bulla Jr

Toxicity of Bacillus thuringiensis subsp. israelensis to adult Aedes aegypti mosquitoes

M J Klowden et al. Appl Environ Microbiol. 1983 Aug.

Abstract

Adult female Aedes aegypti mosquitoes were killed by the parasporal crystals of Bacillus thuringiensis subsp. israelensis (ONR-60A) when the crystals were introduced into the insect midgut as an enema. The 50% lethal dose for intact parasporal crystals was 0.21 microgram/mg of mosquito (wet weight), and for solubilized crystals the 50% lethal dose was 0.04 microgram/mg. These values were compared with 50% lethal concentrations in a free-feeding larval mosquito bioassay of 0.018 and 1.28 microgram/ml for intact and solubilized crystals, respectively. Preparations from B. thuringiensis subsp. kurstaki were ineffective against both adult and larval mosquitoes. An adult mosquito bioassay is suggested as a direct means of screening potential mosquito control agents.

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References

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