Bt cotton is a genetically modified plant whose genes have been altered by the manipulations to make it insect resistant through the introduction of toxin gene. Strains of Bacillus thuringiensis produce proteins that kill specific insects like lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). Bt cotton is made resistant to certain taxa of pests only (as mentioned above). It is quite likely that in future, some other pests may infest these cotton plants.

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