All mosquitoes need water to complete their life cycle. Some mosquitoes lay their eggs in standing water where they hatch in just a day or two. Other mosquitoes may lay their eggs in old tires, tin cans, or other water-holding containers. The eggs may remain unhatched for weeks or even months until they are covered with water. So, after any significant rainfall remember to remove any standing water from your yard to keep mosquitoes from hatching.
You can take simple, positive steps to reduce the breeding of mosquitoes in your own yard:
Get rid of old tires, tin cans, buckets, drums, bottles or any water holding containers.
Fill in or drain any low places (puddles, ruts) in yard.
Keep drains, ditches, and culverts clean of weeds and trash so water will drain properly.
Cover trash containers to keep out rain water
Repair leaky pipes and outside faucets
Empty plastic wading pools at least once a week and store indoors when not in use.
Make sure your backyard pool is properly cared for.
Fill in tree rot holes and hollow stumps that hold water with sand or concrete.
Change the water in bird baths and plant pots or drip trays at least once a week.
Make sure gutters on your house drain properly.
Do not use corrugated pipe to carry the downspouts away from your house, instead use drainage PVC pipe.
Keep grass cut short and shrubbery trimmed so adult mosquitoes will not hide there.