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Medicinal plant species were tested for their fumigant activity against Spodoptera littoralis third instar larvae. Responses varied according to plant species and parts used. For the present investigation, volatile oils were obtained from: Foeniculum vulgare (flowers and seeds), Coriandrum sativum (seeds), Daucus carota (flowers), Pelargonium graveolens (leaves and flowers), Origanum ma- jorana (leaves and flowers), and Salvia officinalis (leaves). Fumigant activity was observed after 24 hours of exposure. All essential oils were proved to be toxic to the third instar larvae. However, the highest mortality was observed in the essential oil of S. officinalis leaves, C. sativum seeds, F. vulgare seeds, D. carota flowers, and O. majorana leaves with LC 50 = 23.050 µl/l air, 68.925 µl/l air, 95.075 µl/l air, 99.300 µl/l air, and 100.925 µl/l air, respectively. Other oils showed an LC 50 between 101 and 183 µl/l air.

INSECTICIDAL ACTIVITIES OF ESSENTIAL OILS FROM SOME CULTIVATED AROMATIC PLANTS AGAINST SPODOPTERA LITTORALIS (BOISD)