Repellent effects of the essential oils of Lavandula angustifolia Mill. and Zataria multiflora Boiss. on Callosobruchus maculatus (F.) (Coleoptera: Bruchidae) with reference to their chemical compositions

In last two decades, considerable attempts have been made to introduce new botanical based insecticides. In this study, repellent effects of the essential oils taken from Lavandula angustifolia and Zataria multiflora on Callosobruchus maculatus adults were evaluated. The essential oils were extracted using a Clevenger apparatus. Bioassays were conducted under 30±1ºC, 60±5% RH and dark condition. The results indicated that L. angustifolia oil was more repellent than Z. multiflora oil. Also repellent effects of both oils on males were greater than those on females. The repellent activity rate of was % on adults essential oil at concentration of males and females The essential oils analysis by GC-MS showed that the main compounds of L. angustifolia oil were linalool, 1,8-cineol, rosefuran epoxide, menthone, isomenthol and dihydro carvone (trans) and those of Z. multiflora oil were thymol, linalool and p-cymene. According to these results, it seems that these two essential oils especially L. angustifolia oil are potentially good candidates for protection of stored products against C. maculatus.