BIOLOGICAL AND FEEDING ACTIVETIES OF THE PINK CORN BORER, SESAMIA CRETICALED.TREATED BY PLANT EXTRACTS

Background: Maize plants are infested with many insect pests. The corn borer, namely: the greater sugarcane borer (the pink borer), Sesamia cretica Led. is one of most injurious insects infesting maize in Egypt and all over world. Results: Results illustrated that mortality percentage within 48 hours S. after feeding 4th instar larvae on leaves treated various plant extracts alcohol or petroleum- ether shows varying degrees percentages. Petroleum extract Cressa was extremely effective, causing 87.5% mortality. Amborosia maritima, Calotropis procera, C. cretica, 77.5% effectiveness may be due to presence diverse chemical groups these toxic borer. On other hand, Lycopersicum esculentum, Lotus glenoid, Aerva javanica, Carpobrotus edulis, Capsium annum, Cassia senna have been minimum effect 7.5, 10.0, 12.5, 12.5 % mortality, respectively. influence minimal as antifeedant (S. cretica) studied. Food consumption varied depending time tested. ratio different significantly different. anti-feeding activity appears had a higher than its toxicity.