Biology & Behaviour of Mosquito
Mosquito are an important group of arthropods that feed on human and animals for blood. There are about 3,100 species of mosquitoes in the world. Female mosquitoes need blood meal to lay eggs.Mosquitoes of different species lay their eggs in a variety of water sources that range from small containers to vast expanses of marshland. The larval stage is always aquatic and shuttles from the subsurface where it filter feeds on micro-organisms, and to the surface to obtain oxygen through a snorkel-like breathing apparatus. The pupal stage does not feed but unlike most insect pupae is extremely active. The adult emerges from the pupal case using air pressure and assume a terrestrial existence.
Source reduction and environmental management
Source reduction and environmental management are the best approaches for providing long-term solution to many mosquito problems. The control of dengue fever vectors, using source reduction by getting rid of unwanted container and prevention of mosquito breeding in useful containers which breed can be highly effective.
Biological control can be briefly defined as the use of biological agents for the control of pests.
For the control of adult mosquitoes, the use of chemical insecticidal adulticide in the form of space spray formulations, both thermal fogging and ultra low volume sprays, against vectors is routinely carried out in the prevention and control of dengue fever outbreak.
Studies on chemical larvicides including insect growth regulator (IGR) have been carried put and it shown to be effective for control of mosquito immatures with the necessary residual effects.
Physical barriers & personal protection
Physical barriers including the netting of premises and the use of repellent should be incorporated in the overall strategies for mosquito control.