advantages and disadvantagse of bt cotton
Answers
Advantages:
Increases yield of cotton due to effective control of three types of bollworms, viz. American, Spotted and Pink bollworms.
Insects belonged to Lepidoptera (Bollworms) are sensitive to crystalline endotoxic protein produced by Bt gene which in turn protects cotton from bollworms.
Reduction in insecticide use in the cultivation of Bt cotton in which bollworms are major pests.
Potential reduction in the cost of cultivation (depending on seed cost versus insecticide costs).
Reduction in es and predators which help in controlling the bollworms by feeding on larvae and eggs of bollworm.
No health hazards due to rare use of insecticides (particularly who is engaged in spraying of insecticides).
Disadvantages :
High cost of Bt cotton seeds as compared to non Bt cotton seeds.
Effectiveness up to 120 days, after that the toxin producing efficiency of the Bt gene drastically reduces.
Ineffective against sucking pests like jassids, aphids, whitefly etc.
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