الملخص الإنجليزي
Methanol and diethyl ether extracts of Harmal, Rhazya stricta Decne.; neem seed kernels, Azadirachta indica A.Juss; cloves, Syzygeum aromaticum (L.); citrus peel and Ramram, Heliotropium bacciferum (Forssk.) were cvaluated for their deterrence to oviposition by Callosobruchus maculatus (F.) on chickpeas in choice tests. Both extracts of all materials significantly reduced oviposition on treated sceds. Maximum deterrent effects (91.8%) were obtained in the neem seed methanol extract at 0.5% concentration, citrus peel 0.1% ether extract (90.9%), R stricta 0.5% mcthanol extract (83.9%), and clove 0.1% ether extract (80.0%). Methanol extracts of neem seeds and R. stricta evoked higher deterrent effects than their etherial extracts, whercas the responses for cloves and citrus pccl were more pronounced in their ether extracts. H. bacciferum % deterrency due to both types of extracts were practically identical. The results encourage future incorporation of such plant extracts as ovipositional deterrents in stored-product IPM programmes.
