Mon Prof Augmenté
Spray and Mosquitoes
Age 12 · Environmental Science
A spray kills many mosquitoes, but a few may survive because they carry protective changes and can pass them to offspring. Rotating sprays or leaving untreated refuges helps slow the spread of those changes.
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In the picture
- Spray bottle nozzle: the spray bottle releases a mist over the dish.
- Mosquito on the dish: this mosquito rests on the dish after the mist passes.
- Marsh water: the marsh is an untreated refuge with water and plants.
- Hovering mosquito: mosquitoes live and breed in the untreated marsh.
Examples
- Head lice that survive a medicated shampoo can pass resistance to their young.
- Weeds that survive one weedkiller can spread, so growers switch weedkillers.
Key takeaways
- A few survivors can make a spray less effective over time.
- Changing sprays or keeping untreated refuges slows resistance.
Quiz: Spray and Mosquitoes (Age 12)
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After a spray kills most mosquitoes, what can the few survivors do?
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Why can a spray stop killing as many mosquitoes after it is used many times?
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What is a good way to slow the spread of insecticide resistance?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
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