Question

Resurgence of whitefly is largely associated with:

• A. Excessive use of Phosphamidon
• B. Excessive use of Lindane
• C. Excessive use of Triazophos
• D. Indiscriminate use of synthetic pyrethroids

Hint:

Whitefly resurgence:
- Caused by synthetic pyrethroids.
- Kills natural enemies.
- Stimulates whitefly reproduction.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
This question tests knowledge of insecticide-induced pest resurgence.

Step 2: Detailed Explanation:
Resurgence of whitefly (Bemisia tabaci) is largely associated with the indiscriminate use of synthetic pyrethroids.
Synthetic pyrethroids kill natural enemies (parasitoids and predators) of whitefly, leading to population outbreaks.
They also cause hormoligosis (stimulation of reproduction) in whiteflies.
Excessive use of Phosphamidon (A), Lindane (B), and Triazophos (C) can also cause resurgence, but pyrethroids are the most commonly associated.
Thus, the correct answer is synthetic pyrethroids.

Step 3: Final Answer:
Thus, resurgence of whitefly is largely associated with indiscriminate use of synthetic pyrethroids, which corresponds to option (D).
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