Characterization and selection of Bacillus thuringiensis isolates effective against Sitophilus oryzae
نویسندگان
چکیده
منابع مشابه
Characterization of parasporin gene harboring Indian isolates of Bacillus thuringiensis
Bacillus thuringiensis (Bt) is popularly known as insecticidal bacterium. However, non-insecticidal Bt strains are more extensively available in natural environment than the insecticidal ones. Parasporin (PS) is a collection of genealogically heterogeneous Cry proteins synthesized in non-insecticidal isolates of Bt. An important character generally related with PS proteins is their strong cytoc...
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Chemical insecticides may be toxic and cause environmental degradation. Consequently, biological control for insects represents an alternative with low ecological impact. In this work, three soil isolates (A21, A51 and C17) from different regions of the Cuban archipelago were identified, characterized and evaluated against Aedes aegypti and Culex quinquefasciatus. The new isolates were compared...
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In this study, we present the selection and the characterization of Bacillus thuringiensis (Bt) strains with respect to their cry/cyt gene content and toxicity evaluation toward one of the most important polyphagous lepidopteran pest, Helicoverpa armigera. Fifty-six Bt isolates were obtained from 10 different regions of northwestern Himalayas, recording a total B. thuringiensis index of 0.62. S...
متن کاملIdentification of novel indigenous Bacillus thuringiensis isolates.
Internally Transcribed Spacers (ITS) characterization and distribution of Repetitive Extragenic Palindromic (REP) sequences were studied in the genome of 223 field isolates of Bacillus thuringiensis from Madurai, India. They were characterized by morphological, biochemical and molecular methods. One hundred and twenty four of a total 223 isolates fitted ITS characterization of B. thuringiensis ...
متن کاملfAFLP analysis of Brazilian Bacillus thuringiensis isolates
A total of 65 Bacillus thuringiensis (Bt) isolates were subjected to analysis of genetic relationship using fAFLP (fluorescent Fragment Length Polymorphism), in order to determine the genetic diversity within a group of Bt strains. 26 strains from different subspecies were identified as it follows: 9 kindly provided by the USDA (United States Department of Agriculture), 9 kindly provided by the...
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ژورنال
عنوان ژورنال: Scientia Agricola
سال: 2010
ISSN: 0103-9016
DOI: 10.1590/s0103-90162010000400015