Class 12 NEET Biology Biotechnology and Its Applications

(d) : Bacillus thuringiensis strains have been used for designing bioinsecticidal plants. A gene from this bacteria have insecticidal property which is transferred to cotton plants to produce Bt cotton which is resistant to bollworm insect which is a major pest of cotton. Similarly insects affecting maize; cabbage, sunflower etc., are also controlled by mutant strains of Bacillus thuringiensis bacteria.