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Title: Characterization of Mosquito Larvicidal Bacillus thuringiensis Isolated from Soils of India
Authors: Sur, Banani
Nigam, Nitu
Joshi, A K
Bihari, Vinod
Keywords: Bacillus thuringiensis;Bioinsecticide;Ecological niche;Parasporal inclusion;Serotype
Issue Date: Apr-2003
Publisher: NISCAIR-CSIR, India
Abstract: It has been established now that insects are acquiring resistance to commercial products of Bacillus thuringiensis. So there is a continuous search for bacteria producing new toxins. With this in view, an insecticidal B. thuringiensis was isolated from soil sample obtained from the vicinity of a penicillin factory in Vadodara, India. The isolate belongs to serotype H-14. Phenotypic characters of the isolate were identical to standard B. thuringiensis var. israelensis IPS-82. It was found to possess good larvicidal activity against Anopheles stephensi and Culex pipiens and exhibited high resistance for penicillin (500 ug/ml), The electrophoretic protein profiles of purified crystals with standard B. thuringiensis (IPS-82) were studied. The isolate apparently showed the same protein profile as that of B. thuringiensis var. israelensis. Soil with natural selective pressure of antibiotic penicillin thus appears to be a good ecological niche for the isolation of B. thuringiensis.
Page(s): 268-270
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Appears in Collections:IJBT Vol.02(2) [April 2003]

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