There is an increasig interest in substances formed by microorganisms that are toxic to insect .These substances are not only employed for the study of the mechanism responsible for the pathogenicity for insects,but also can be applied inmicrobial control.Proteolytic activity of bacterial pathogens.espe cially the potential pathogens and obligatory crystalliferous pathogens like Bacillus thuringiensis is of importance as it hydrolyses the host proteins and supplies the pathogen with suitable form of nitrogen with suitable form of nitrogen.Although there are reports about the proteolytic enzyme activity of B.thuringiensis by Bucher(1960)and Krieg(1961).there has been no substantial evidence about the production of this enzyme with quantitative data-Hence,the present study on the proteolytic activity of B.thurin giensis in two different culture media was made.
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Madras Agricultural Students Union
Tamil Nadu Agricultural University
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003
Tamil Nadu, India.
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