Write the advantages and disadvantages of Bt cotton.

Explanation

(i) Yield of cotton is increased due to effective control of bollworms.
(ii) Reduction in insecticide use in the cultivation of Bt cotton
(iii) Potential reduction in the cost of cultivation.
Bt cotton has some limitations:
(i) Cost of Bt cotton seed is high.
(ii) Effectiveness upto 120 days after that efficiency is reduced.
(iii) Ineffeetive against sucking pets like jassids, aphids and whitefly.
(iv) Affects pollinating insects and thus and thus yield .