International Journal of Entomology Research

Authors
Mehmet Karakas

Abstract
In this study, ethanol extract of Pelargonium zonale (L.) L’Hér. ex Aiton (Geranium), Cymbopogon citratus L. (DC. ex Nees) Stapf (Lemon grass), Melissa officinalis L. (Lemon balm), Origanum majorana L. (Marjoram) and Coriandrum sativum L. (Coriander) were evaluated for their efficacy on mortality and progeny production of wheat weevil, Sitophilus granarius L. (Coleoptera: Curculionidae). Adult insects were exposed to the 5 and 10% extracts treated wheat and mortality was assessed after 1, 2, 7, 14 and 21 days. Subsequently, all adults were removed and the treated grains remained at the same conditions for an additional 45 days. After this interval, the commodity was checked for progeny production. All extracts, the beetles mortality was increased in dose dependent manner. Results indicated that C. citratus and P. zonale extracts were more effective than M. officinalis, O. majorana and C. sativum against adult insects. Interestingly, the progeny production (F1) was complete by suppressed even in lowest dose. It was concluded that both C. citratus and P. zonale can be used for the protection of stored wheat from infestations of S. granarius.