Abstract:
Mosquitoes transmit serious human diseases, causing millions of deaths every year and the development of
resistance to chemical insecticides resulting in rebounding vectorial capacity. And it cause adverse
environmental effects in addition to high cost. Plants may be alternative sources of mosquito control agents.
Aedes aegypti, yellow fever causing mosquito is a vector for transmitting several tropical fevers. It spreads
dengue, chikungunya, zika fever, and other diseases. Currently no vaccines or drugs are developed to prevent
dengue, zika, and chikungunya. The plan of present study was to analyse the larvicidal efficacy of fruit extracts
of Carica papaya; Citrullus lanatus; and Mangifera indica against the larvae of Aedes aegypti. In the present
study, larvicidal efficacy of different concentrations of Carica papaya; Mangifera indica; and Citrullus lanatus
were evaluated for studying the mortality of Aedes aegypti. Present study revealed that fruit extract of Carica
papaya shows much more effect in larvicidal activity of Aedes aegypti. Comparatively less activity showed by
extract of Citrullus lanatus and no or little activity by extract of Mangifera indica. Different concentrations
shows different activities. Higher concentrations shows relative high larvicidal activity. Combinations of
extracts shows much more larvicidal activity. Of these, combination of Carica papaya and Citrullus lanatus
shows better larvicidal activity, and other two combinations (Citrullus lanatus + Mangifera indica ; and Carica
papaya+ Mangifera indica) showed less activity, it may due to the resistant larvicidal activity of Mangifera
indica. As there is no vaccine for dengue , the only primary way to control the disease causing agent by natural
ways. Our study revealed that fruit extract of Carica papaya and its combination with extract of Citrullus
lanatus is a well ,powerful and cost effective biopesticide for the control of mosquitoes.
