EVALUATION OF THE INSECTICIDAL EFFECTS OF GARLIC EXTRACT ON THE COTTON APHID Aphis gossypii Glover (Homoptera: Aphididae

Abstract

In the present work, systemic and contact toxicity of garlic emulsion and garlic with green water extract was evaluated on cotton aphid Aphis gossypii Gol. The study was carried out on okra plant which was grown in polyethylene bags inside a greenhouse at the faculty of agricultural studies, Shambat during the period from January to March 2004. The plants were infested with aphids and the effects of garlic and garlic with green chilli emulsions were studied by direct spraying to the okra foliage. The two emulsions were used at the following concentrations 2.5%, 5% and 10% in addition to malathion 57% in a concentration of 3cm3 /L: the latter was used as a reference standard product. The results obtained were statistically analysed and the following findings were shown: malathion was found to be the most effective compared to garlic and garlic with green chilli emulsions. With regared to garlic emulsion, the concentration 10% was found to be more effective than 2.5%and 5% .The same results were found for garlic with green chilli in which 10% concentration was more effective than2.5% and5%. The10% concentration of garlic with chilli appeared more effective than garlic alone.