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Title: Laboratory evaluation of the resistance of plastics to the subterranean termite Coptotermes formosanus (Blattodea: Rhinotermitidae)
Authors: Tsunoda, Kunio
Rosenblat, Gregory
Dohi, Koji
Author's alias: 角田, 邦夫
Keywords: Termite-resistance
Plastic bars
Plastic films
Plastic tubes (pipes)
Polyamide
Coptotermes formosanus
Issue Date: Jun-2010
Publisher: Elsevier
Journal title: International Biodeterioration & Biodegradation
Volume: 64
Issue: 3
Start page: 232
End page: 237
Abstract: Since preliminary studies demonstrated unsuitability of the existing Japanese standardized methods for evaluating the termite-resistance of plastics, a new laboratory method was tested for its applicability. Assembled units, each consisting of a plastic material and a wood attachment surrounding a plastic sample, were placed around a laboratory nest of Coptotermes formosanus for 6 weeks at 28 ± 2 °C and over 80% relative humidity, and the termite attack was assessed visually. Amorphous polyamide performed best, and low-density polyethylene did worst. This new laboratory method succeeded in demonstrating termite damage to materials that are susceptible under actual service conditions, although it is not applicable to evaluating insecticide-incorporated plastics. A modified JWPA Standard No. 17 test method was employed to determine the minimum number of termites required to attack high-density polyethylene film so that it was possible to standardize the method to compare termite-resistance of non-woody materials with or without chemical treatment. It was concluded that 300 workers of C. formosanus in 12.6 cm2 of foraging area, which was equivalent to the termite density (pressure) of 24 workers cm−2 foraging area, were required for termites to attack from a straight scratched surface.
Rights: © 2010 Elsevier B.V.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/115103
DOI(Published Version): 10.1016/j.ibiod.2009.12.008
Appears in Collections:Journal Articles

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