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Insects 2016, 7(3), 36; doi:10.3390/insects7030036

Effects of Decompression Treatment for Controlling the Powderpost Beetle, Lyctus africanus Lesne, (Coleoptera: Lyctinae)

1
Production Engineering and Procurement Department, Yamaha Corporation, 283 Aoya-cho, Minami-ku, Hamamatsu 435-8567, Japan
2
Research Institute for Sustainable Humanosphere, Kyoto University, Uji Campus, Kyoto 611-0011, Japan
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Brian T. Forschler
Received: 8 May 2016 / Revised: 7 July 2016 / Accepted: 11 July 2016 / Published: 15 July 2016
(This article belongs to the Special Issue Management of Wood-Attacking Insects)
View Full-Text   |   Download PDF [911 KB, uploaded 15 July 2016]   |  

Abstract

The efficacy of decompression treatment as a non-destructive method to control larvae of the powderpost beetle, Lyctus africanus Lesne, was evaluated in the laboratory using various combinations of two pressure levels, 1.1 kPa and 40 kPa, and three temperature levels, 20, 25, and 40 °C. Larval mortality generally depended on weight reduction while decreases in the oxygen level had relatively little effect. The lower pressure, 1.1 kPa, significantly affected mortality, and no larvae survived after 12 h of this pressure treatment, at 25 °C. The average body weight was reduced with treatment time and temperature, and the reduction rate at 25 °C was higher than that at the lower temperature, 20 °C. Effects on larvae of the higher pressure treatment, 40 kPa, with a CO2 gas purge, were tested to determine the feasibility of decompression treatment in the manufacturing process. Although higher pressure resulted in low mortality, the body weight was dramatically decreased using the CO2 purge. These results present important information on the possibility of using decompression treatment for wood products. View Full-Text
Keywords: decompression treatment; L. africanus; powderpost beetle; CO2 purge decompression treatment; L. africanus; powderpost beetle; CO2 purge
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Nakai, K.; Hiraku, T.; Fujimoto, I.; Yoshimura, T. Effects of Decompression Treatment for Controlling the Powderpost Beetle, Lyctus africanus Lesne, (Coleoptera: Lyctinae). Insects 2016, 7, 36.

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