Only the female mosquitoes feed on blood, male mosquitoes feed on plant nectar and juices. Female Mosquitoes are attracted by CO (Carbon dioxide) in our breath. They can detect Carbon dioxide from great distances, When the female mosquito gets close, that makes a final choice using skin temperature, odor and other chemical or visual factors.
The malaria causing female anopheles mosquitoes, dengue causing aedes mosquitoes generally bites in the evening time. Pesticide Fogging can be used to kill the mosquitoes, the effect of fogging will be 2 to 3 hours. The best way to avoid mosquito bite in the evening time when working outside is wearing full shirt/ jackets.
In construction sites and other work areas mosquito breed in stagnant water, to prevent growth of mosquitoes, the stagnant water should be removed at least once in a week.
When a pupa is ready to become an adult mosquito, the pupa case splits open and an adult mosquito emerges from the pupa case. The adult mosquito then balances on the pupa case and the surface of the water until its wings are dry and hard. It can then fly away. Before the mosquitoes fly from the water, it's the best time to kill mosquito using pesticide spray or putting waste oil over the water.