Abstract

Farnaz Shafaie¹, Shahram Aramideh*², Oruj Valizadegan², Mohammad Hassan Safaralizadeh² and Ali Hosseini-Gharalari³

DOI : http://dx.doi.org/10.13005/ojc/350337

Susceptibility of adult Cowpea Weevil, Callosobruchus maculatus F., and Wheat Weevil, Sitophilus granarius L. to essential oils of Cupressus arizonica Greene, Juniperus communis L. and Mentha longifolia L. were studied in the laboratory. The chemical composition of the essential oils were identified by GC/MS. Eicosane (27.42%), Umbellulone (12.92%) and α-pinene (10.51%) were major components of C. arizonica oil. Sabinene (31.93%), Limonene (25.62%) and Bornyl acetate (7.41%) were major components of J. communis oil. Pulegone (25.66%), L-menthone (13.43%) and Cis-para-Menthan-3, 8-diol (10.22%) were major components of M. longifolia oil. Based on the LC₅₀ values, M. longifolia (44.06 µl/L) had the highest toxicity against C. maculatus adults, and J. communis (109.60 µl/L) had the highest toxicity against S. granarius adults. The highest mortality of C. maculatus (96.23%) happened when treated with C. arizonica (LC₂₅) + J. communis (LC₂₅). The highest mortality of S. granarius (63.85%) happened when treated with J. communis (LC₂₅) + M. longifolia (LC₂₅). There is a promising potential for controlling the cowpea weevil and the wheat weevil by using the essential oils of the studied plants.

Cowpea Weevil; Essential Oil; GC/MS; Insecticidal Effect; Wheat Weevil

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