How effective is the mosquito spray?
Pesticides properly applied to water kill 95% – 100% of the mosquito larvae. It is more difficult to tell how effective sprays to kill adult mosquitoes are because it is not known exactly how many mosquitoes are present before spraying. Adult sprays applied by aircraft are very effective because the spray covers a very large area. Reductions of 90% in surveillance numbers before and after treatment are common. Adult sprays applied by trucks can be just as effective where parallel roads are close together, where there is a light wind, and vegetation around houses is not thick. It is less effective if there is no wind, high humidity, too few roads, and heavy vegetation.
