Q.Write the advantages and disadvantages of Bt cotton.

Step 1. State the advantages. The chapter lists Bt cotton's advantages as: yield of cotton is increased due to effective control of bollworms; reduction in insecticide use in the cultivation of Bt cotton; and potential reduction in the cost of cultivation.

Step 2. State the disadvantages. The chapter lists Bt cotton's limitations as: the cost of Bt cotton seed is high; its effectiveness lasts only up to 120 days, after which efficiency is reduced; it is ineffective against sucking pests like jassids, aphids and whitefly; and it affects pollinating insects, which in turn affects yield. …

List the chapter's stated advantages and disadvantages of Bt cotton separately, …

• Presenting only the advantages and omitting the disadvantages the chapter documents equally explicitly. …