4.6 Article

Cyt1Ab1 and Cyt2Ba1 from Bacillus thuringiensis subsp medellin and B-thuringiensis subsp israelensis synergize Bacillus sphaericus against Aedes aegypti and resistant Culex quinquefasciatus (Diptera: Culicidae)

Journal

APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Volume 67, Issue 7, Pages 3280-3284

Publisher

AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.67.7.3280-3284.2001

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The interaction of two cytolytic toxins, Cyt1Ab from Bacillus thuringiensis subsp. medellia and Cyt2Ba from Bacillus thuringiensis subsp, israelensis, with Bacillus sphaericus was evaluated against susceptible and resistant Culex quinquefasciatus and the nonsensitive species Aedes aegypti. Mixtures of B. sphaericus with either cytolytic toxin were synergistic, and B. sphaericus resistance in e, quinquefasciatus was suppressed from > 17,000- to 2-fold with a 3:1 mixture of B. sphaericus and Cyt1Ab. This trait may prove useful for combating insecticide resistance and for improving the activity of microbial insecticides.

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