Bacillus thuringiensis is used as :
[UKPCS Pre 2012
1) Biofertilizer
2) Biological insecticide
3) Chemical fertilizer
4) Chemical insecticide
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The bacterium secretes specific proteins known as “cry proteins” that are toxic to insects.
DNA of the bacteria is genetically transferred to crop plants. This facilitated the production of cry proteins in plant cells that helped to kill pests.
2) Biological insecticide