Every pesticide develops its own failure as its repeated use leads to:
Correct answer: A. The development of resistant pest varieties
- A. The development of resistant pest varieties
- B. Simplification of food web
- C. Reduction in population of useful birds
- D. Increase in weed population
Explanation
Repeated pesticide use selects the naturally resistant individuals, which survive and reproduce until the pest population becomes less controllable. This is evolutionary resistance, not an immediate failure of the pesticide’s chemical action.
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