Question

Spraying kerosene on stagnant water shall kill Anopheles due to

• A. Prevention of spiracle to come in contact with air
• B. Entry into and blocking of respiratory tract
• C. Diffusion into body
• D. Burning of body wall

Answer 1

The correct option is B Entry into and blocking of respiratory tract

Spraying of kerosene on stagnant water kill Anopheles mosquito by

• Suffocation due to a mechanical barrier formed between Anopheles mosquito and the air.
• Suffocation due to the kerosene entering into breathing siphons present in the respiratory tract of Anopheles to an extent sufficient to physically block the passage of air.

So, the correct answer is 'Entry into and blocking of respiratory tract'.