Bioactivities of patchoulol and phloroacetophenone from Pogostemon cablin essential oil against three insects

Yi-Xi Feng,Yang Wang,Chun-Xue You,Shan-Shan Guo,Yue-Shen Du,Shu-Shan Du

doi:10.1080/10942912.2019.1648508

Abstract

ABSTRACT The essential oil was obtained from the aerial parts of Pogostemon cablin by hydrodistillation. The chemical compounds of P. cablin essential oil were analyzed by gas chromatography-flame ionization detection and gas chromatography-mass spectrometry. Eight compounds were totally identified and accounted for 92.4% of the oil. Patchoulol was the major component (51.1%), followed by phloroacetophenone (23.5%) and β-patchoulene (7.3%). The essential oil and its two major compounds patchoulol and phloroacetophenone were evaluated for their contact and repellent activities against Tribolium castaneum, Lasioderma serricorne, and Liposcelis bostrychophila. Results of bioassays indicated that the essential oil and patchoulol had great contact toxicity against three species of insects. Meanwhile, the essential oil and patchoulol showed great repellent activities against T. castaneum and L. bostrychophila but were mildly repellent to L. serricorne. Phloroacetophenone exhibited neither contact nor repellent activity against any of these target insects. This work emphasized the promising potential of P. cablin to control insect pests during storage.

Highlights

The booklice Liposcelis bostrychophila Badonnel (Psocoptera: Liposcelididae), the red flour beetles Tribolium castaneum Herbst (Coleoptera: Tenebrionidae), and the cigarette beetles Lasioderma serricorne Fabricius (Coleoptera: Anobiidae) are three important insect pest species commonly occurring in stored products.[1]
A previous review has summarized that the yield of P. cablin ranged from 0.54% to 5.2%, and averaged 2.6%
The basic compounds responsible for its smell are still in discussion,[19] but some researchers believe that patchoulol, patchoulene, guaiene, and seychellene characterize the aroma odor of P. cablin essential oil.[31]

Summary

Introduction

The booklice Liposcelis bostrychophila Badonnel (Psocoptera: Liposcelididae), the red flour beetles Tribolium castaneum Herbst (Coleoptera: Tenebrionidae), and the cigarette beetles Lasioderma serricorne Fabricius (Coleoptera: Anobiidae) are three important insect pest species commonly occurring in stored products.[1]. Efforts have been taken to control storage pests along with the development of agriculture. Botanical insecticides have been used for centuries such as nicotine and azadirachtin.[4] But they are overtaken by the discovery of dichloro-diphenyl-tricgloroethane (DDT), which is the first synthetic insecticide in the word.[5] Though some synthetic insecticides have been abandoned the others are still in practical use widely, including triflumezopyrim, dicloromezotiaz and flupyradifurone.[6] With the extensive use of synthetic insecticides, problems ensued: ecosystem disruption,[7] water contamination, biodiversity decrease,[8] and insect resistance.[9,10] Along with consumers’ growing demands for synthetic chemical-free products and severely restrictive government regulatory on synthetic insecticides,[11] researchers turn back to botanical methods for pests management These methods include sealing,[12] controlled atmospheres storage by purging nitrogen,[13] temperature management,[3] and biopesticide.[14]

Methods

Results

Conclusion