Authors: ShengYang Wang WanChi Lai FangHua Chu ChienTsong Lin ShiYen Shen ShangTzen Chang
Publish Date: 2006/12/01
Volume: 52, Issue: 6, Pages: 522-526
Abstract
This is the first article to report the evaluation of a natural product used as an antisilverfish agent Silverfish Lepisma saccharina primitive wingless insects feed on a variety of materials including paper cotton starch and cereals They can be a problem in libraries and other places where books documents and papers are stored In this pilot study the essential oil from leaves of Cryptomeria japonica was investigated to test its properties as a silverfish repellent and insecticide The results from a repellency bioassay show that the essential oil significantly repelled silverfish The repellent activity was 80 at a dosage of 001 mg/cm3 When silverfish were exposed to a concentration of 016 mg/cm3 of essential oil they were killed within 10h The chemical composition of essential oil the emissions from a test chamber and the residue left on filter papers previously soaked with the essential oil in a chamber were analyzed by gas chromatographymass spectrometry The components of the essential oil were found to be elemol 1822 16kaurene 1163 3carene 966 sabinene 937 4terpineol 906 βeudesmol 570 αpinene 562 and limonene 526 Only some constituents of the essential oil compounds collected by solidphase microextraction were found to be emitted in the test chamber The main constituents were 3carene 2103 pcymene 1095 limonene 949 βmyrcene 939 γterpinene 910 αterpinene 857 and 4terpineol 797
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