Mon Prof Augmenté
Spray and Mosquitoes
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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Age 12: open this week
Browse Age 12
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.
Carry on in the app
Three questions on this lesson. It has left the free week, so its quiz is for subscribers.
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