Write the advantages and disadvantages of Bt cotton.

Explanation

The advantages of Bt cotton are :
`**` Yield of cotton is increased due to effective control of bollworms.
`**` Reduction in insecticide use in the cultivation of Bt cotton
`**` Potential reduction in the cost of cultivation.
Bt cotton has some limitations :
`**` Cost of Bt cotton seed is high
`**` Effectiveness up to 120 days after that efficiency is reduced .
`**` Ineffective against sucking pests like jassids , aphids adn whitefly.
`**` Affects pollinating insects and thus yield.