Bioactivities and Chemical Constituents of Essential Oils Extracted from Caryopteris mongholica Bunge against Two Stored-Product Insects

Abstract

This work investigated the chemical constituents of the essential oil (EO) extracted from different organs (whole plants, flower and fruits, leave and branches) of Caryopteris mongholica. At the same time, the fumigant, contact and repellent effect of the EO from C. mongholica against Lasioderma serricorne and Tribolium castaneum were evaluated. The main chemical components were identified from the EO included β-pinene (24.77 %), 4-terpineol (15.80 %), β-cis-ocimene (9.31 %), α-pinene (8.20 %), 2-isopropyltoluene (7.37 %). The results of bioassays indicated that EO was toxicity to T. castaneum than L. serricorne. The results also showed that possessed stronger repellent activity against T. castaneum than L. serricorne. The results provided a basis for the development and utilization in the future for the control of insects.