Question 1 · Medium
Under the NVBDCP, the main method used to control the larvae of dengue vectors around homes is:
- AIndoor residual spraying of house walls
- BUsing bed nets during sleep at night
- CWeekly emptying of water containers
- DDraining large rivers near the village
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Answer: C · Weekly emptying of water containers
Aedes breeds in small collections of clean water in and around homes, so source reduction, emptying and scrubbing containers weekly, is the key measure. A 'dry day' each week breaks the breeding cycle. Aedes bites by day, so night bed nets help less.
- A: Residual spraying targets resting Anopheles, not Aedes larvae.
- B: Aedes is a day biter, so night nets give less protection.
- D: Rivers are not where Aedes breeds.