How effective is the spray?

Pesticides properly applied to water kill 95% to 100% of the mosquito larvae and, thus, are very effective. 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, usually several square miles. Reductions of 90% 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 the vegetation around houses is not thick. It is less effective if there is no wind, high humidity, too few roads and heavy vegetation. Traps are often used to measure the population levels before and after spraying.

Show All Answers

1. What if I don’t want my property treated or sprayed?
2. Are mosquitoes attracted to some people more than others?
3. What purposes do mosquitoes serve?
4. What diseases do mosquitoes carry?
5. Do mosquitoes carry AIDS?
6. Are the chemicals harmful to people or pets?
7. Will DEET hurt children?
8. What is the best personal repellent?
9. How can one type of insect be controlled without hurting other insects or wildlife?
10. What is the best way to control mosquitoes?
11. How effective is the spray?
12. Why can't mosquito control programs spray during the day?
13. How do districts decide where to spray?
14. How long does the mosquito spray last?
15. What does Mosquito Control do and why?
16. How safe are the pesticides being used?
17. When do you spray?
18. Is it true that only certain mosquitoes bite and/or transmit disease?
19. Can I as a homeowner make a difference in the mosquito population in my area?
20. Can I spray my yard myself?
21. Why is it so important that I inspect my yard when ditches and woodland surround me?
22. When are the Commission Meetings held?