Toxicity of Bacillus thuringiensis toward Aedes aegypti larvae. |
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| Authors: | W Panbangred S Pantuwatana A Bhumiratana |
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| Institution: | Department of Microbiology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 4, Thailand |
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| Abstract: | Among six strains of Bacillus thuringiensis and five other species of Bacillus, only two strains of B. thuringiensis, strains HD-1 and BA-068, were toxic to Aedes aegypti larvae within 24 hr. The LC50s were 5.6 × 104 and 2.4 × 105 spores/ml for strains HD-1 and BA-068, respectively. The toxic factor(s) was heat sensitive and γ ray resistant and preliminary evidences indicated that it was associated with the crystalline body of B. thuringiensis. |
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| Keywords: | biological control |
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