Plants are the chemical factories of nature, producing many chemicals, some of which have medicinal and pesticidal properties. Larvicides of plant origin are currently receiving considerable attention because of their relatively harmless biodegradable properties. Since 1920s more than 2000 plants have been tested for insecticidal properties. Botanical pesticides are promising in that they are effective, environment – friendly, easily biodegradable and also inexpensive. Botanical pesticides have been used traditionally by human communities in many parts of the world against pest species of insects. The failure to discover a significant new class of insecticides has led many researchers back to bio discovery studies in the search for new and economically viable alternatives (Jacobson, 1958). Recently, lot of research work is being carried out in India to search for alternative eco-friendly effective larvicides from botanical origin (Singh et al., 2010).
Many plants have been found to contain chemicals which are helpful for the control of insects (Robert, 2001) and are useful for field applications in mosquito control program (Kalyanasundaram and Das, 1985). Limonoids from Rutaceae particularly citrus (Klocke and Kubo, 1982) have attracted greater apprehension due to their growth regulating activities (Champage et al., 1992).Read more,,,,,,,