Chemical composition and insecticidal activity of Juniperus excelsa Marschall von Bieberstein on adults of cowpea weevil, Callosobruchus maculatus Fabricius

زندی سوهانی, نوشین and حاتمی باورصاد, شیما and خدادادزاده, حسین Chemical composition and insecticidal activity of Juniperus excelsa Marschall von Bieberstein on adults of cowpea weevil, Callosobruchus maculatus Fabricius. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

In this study, the essential oil from the leaves and twigs of Juniperus excelsa Marschall von Bieberstein was isolated by hydro-distillation and then analyzed by GC-MS for identification of its components. The essential oil was also tested on males and females of Callosobruchus maculatus (F.) for its fumigant activity. According to the results, the major component of the oil were α-Pinene (58.3%), Linalool (9.19 %), and cedrol (6.92%), respectively. Juniperus excelsa essential oil was found to be very toxic to adult insects when applied as fumigant. Responses of insects varied according to the gender and the males were more susceptible than females. LC50 values were calculated to be 0.0919 and 0.9268 µL/L air, for males and females, respectively. These results suggest that J. excelsa essential oil has the potential to be used for the control of stored products pests.

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