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)
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چکیده
منابع مشابه
Cyt1A from Bacillus thuringiensis restores toxicity of Bacillus sphaericus against resistant Culex quinquefasciatus (Diptera: Culicidae).
The 2362 strain of Bacillus sphaericus, which produces a binary toxin highly active against Culex mosquitoes, has been developed recently as a commercial larvicide. It is being used currently in operational mosquito control programs in several countries including Brazil, France, India, and the United States. Laboratory studies have shown that mosquitoes can develop resistance to B. sphaericus, ...
متن کاملImpact of inorganic pollutants perchlorate and hexavalent chromium on efficacy of Bacillus sphaericus and Bacillus thuringiensis subsp. israelensis against Culex quinquefasciatus (Diptera: Culicidae).
The effects of two widespread environmental pollutants, perchlorate and hexavalent chromium, were assessed on the efficacy of Bacillus thuringiensis subsp. israelensis (Bti) and Bacillus sphaericus (Bsph) against fourth instars of Culex quinquefasciatus Say (Diptera: Culicidae) in 24-h laboratory bioassays. Although 250 mg/liter perchlorate, a level somewhat higher than would be considered ecol...
متن کاملCyt1A from Bacillus thuringiensis synergizes activity of Bacillus sphaericus against Aedes aegypti (Diptera: Culicidae).
Bacillus sphaericus is a mosquitocidal bacterium recently developed as a commercial larvicide that is used worldwide to control pestiferous and vector mosquitoes. Whereas B. sphaericus is highly active against larvae of Culex and Anopheles mosquitoes, it is virtually nontoxic to Aedes aegypti, an important vector species. In the present study, we evaluated the capacity of the cytolytic protein ...
متن کاملVariable Cross-Resistance to Cry11B from Bacillus thuringiensis subsp. jegathesan in Culex quinquefasciatus (Diptera: Culicidae) Resistant to Single or Multiple Toxins of Bacillus thuringienisis subsp. israelensis
A novel mosquitocidal bacterium, Bacillus thuringiensis subsp. jegathesan, and one of its toxins, Cry11B, in a recombinant B. thuringiensis strain were evaluated for cross-resistance with strains of the mosquito Culex quinquefasciatus that are resistant to single and multiple toxins of Bacillus thuringiensis subsp. israelensis. The levels of cross-resistance (resistance ratios [RR]) at concentr...
متن کاملDeletion of the Cry11A or the Cyt1A toxin from Bacillus thuringiensis subsp. israelensis: effect on toxicity against resistant Culex quinquefasciatus (Diptera: Culicidae).
Bacillus thuringiensis subsp. israelensis is a bacterium that produces crystalline, protein toxins whose activity has been exploited to develop environmentally safe biopesticides that are important in mosquito control. B. t. subsp. israelensis has six genes encoding toxic proteins on a 137 kDa plasmid, including: cry4A, cry4B, cry10A, cry11A (formerly cry4D), cyt1Aa, and cyt2Ba (Ben-Dov et al.,...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 2001
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.67.7.3280-3284.2001