Mosquitoes are important pests because their biting activity often interferes with outdoor activities and can transmit disease organisms to people and domestic animals. Most mosquitoes are active during twilight hours and at night; however, around the home, the mosquitoes that breed in discarded containers are active during the day. Mosquitoes need water to complete their life cycle. They can breed in almost any source of water. Pesticides are only a short-term solution to nuisance mosquito problems.
Find out more about how to control mosquitoes at: http://www.ces.ncsu.edu/depts/ent/notes/Urban/mosquito.htm