The present study was conducted to know the effect of different biopesticides on aphid Aphis craccivora which attacks cowpea plant, Vigna unguiculata. Pesticides residues in agricultural commodities are being the issue of major concern besides their harmful effect up on human life, wild life and other flora and fauna. There is also an urgent need for research and development of ecofriendly and biorational insecticides for pestcontrol in Cowpea. About 25 million cases of acute occupational pesticide poisoning in developing countries are being reported each year. Observations were made regarding the influence of biopesticides on the stages of growth. The study was conducted to identify whether biopesticides such as neem oilemulsion, tobacco decoction, neem kemal suspension and ginger garlic extract were effective against cowpea aphid. Among the biopesticides, neem oil was found to be very effective against cowpea aphid. Its cost of production is very less as compared to other chemical pesticides and easily available in nature. Biopesticides are safer to humans and is environmentally sound because it does not cause residue problems.