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Why are mosquitoes able to survive pesticide spraying?

April 26, 2017able mosquitoes pesticide spraying survive

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Why are mosquitoes able to survive pesticide spraying?

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Pesticides such as resmethrin are designed to kill adult mosquitoes within 5-30 minutes of contact. Contact is more reliably achieved after sunset and overnight when most mosquitoes are airborne. When contact is made, insecticides such as resmethrin are approximately 90% effective so some mosquitoes do survive spraying. It is not designed to kill mosquito larvae so non-adult mosquitoes will not be affected and new hatches of adults may need to be addressed.