An investigation on fumigant effect of the extract of Origanum vulgare (Lamiales: Lamiaceae) for control of two stored-product beetles

Origanum vulgare L. was collected from Ardebil, Guilan and Mazandaran provinces to assess the fumigant toxicity of its extract and determine LC۵۰ and LC۹۵ values for different developmental stages of Callosobruchus maculatus F. and Tribolium confusum J. du Val. It was extracted by solvents including methanol and dichloromethane. Eggs, larvae and adult of both species were exposed to dichloromethane and methanol extracts of O. vulgare for ۷۲ hours. LC۵۰ and LC۹۵ values of dichloromethane extract were calculated ۲۰۸۴.۵۱ and ۴۹۹۱.۲۴ µl/l air for adults of T. cofusum, and ۲۲۸۲.۸۰ and ۶۶۸۴.۷۱µl/l air for adults of C. maculatus, respectively. Also, LC۵۰ and LC۹۵ values of methanol extract were ۱۷۲۶.۵۷ and ۵۳۹۵.۶۰ µl/l air for adults of T. cofusum, and ۲۰۴۰.۸۸ and ۵۶۰۷.۷۷ µl/l air for adults of C. maculatus, respectively.

کلیدواژه ها:

Origanum vulgare ، اثر تدخینی ، Callosobruchus maculatus ، Tribolium confusum