What is meant by the term Biopesticide ? Name and explain the mode of action of a popular biopesticide ?

Explanation

The organism which kills the other pathogenic organisms called Biopesticides. Eg. : Bacillus thuringiensis. It produces inactive crystals put once on insect in guts, it is converted into an active form due to alkaline pH of the gut and cause cell swelling and lysis finally the death of the insect.