Over the years which type of pesticide have moths become resistant to?

Over the years which type of pesticide have moths become resistant to?

• A. Malathion
• B. Grain Protectant
• C. Second Generation Anti-Coagulants
• D. Dichlorvos

Answer: (A)

Pests develop resistance when they’re repeatedly exposed to the same chemical, giving the survivors a chance to pass on resistant traits. Moths have faced long-term exposure to malathion, an organophosphate used widely in stored-product protection, which creates strong selection pressure. Over time, moth populations can evolve mechanisms such as enhanced detoxification enzymes or mutations in the acetylcholinesterase target that reduce malathion’s effect. This buildup of resistance makes malathion less effective, so moths appear resistant in years of use. This is why pest management practices emphasize rotating pesticides with different modes of action, combining chemical and non-chemical controls, and monitoring for resistance. The other options don’t fit as well: a grain protectant is a broad category rather than a specific pesticide, second generation anti-coagulants are for rodent control, and while resistance to other organophosphates like dichlorvos can occur, malathion resistance has been the most commonly observed in moths.

Pests develop resistance when they’re repeatedly exposed to the same chemical, giving the survivors a chance to pass on resistant traits. Moths have faced long-term exposure to malathion, an organophosphate used widely in stored-product protection, which creates strong selection pressure. Over time, moth populations can evolve mechanisms such as enhanced detoxification enzymes or mutations in the acetylcholinesterase target that reduce malathion’s effect. This buildup of resistance makes malathion less effective, so moths appear resistant in years of use.

This is why pest management practices emphasize rotating pesticides with different modes of action, combining chemical and non-chemical controls, and monitoring for resistance. The other options don’t fit as well: a grain protectant is a broad category rather than a specific pesticide, second generation anti-coagulants are for rodent control, and while resistance to other organophosphates like dichlorvos can occur, malathion resistance has been the most commonly observed in moths.