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Abstract

This study evaluated the termite susceptibility of Papua New Guinea (PNG) balsa (Ochroma pyramidale) against Australia’s most economically important wood-destroying termite species, Coptotermes acinaciformis. Samples of envelope treated PNG balsa with the insecticide bifenthrin and non-treated balsa, radiata pine (Pinus radiata) sapwood and southern blue gum (Eucalyptus globulus) heartwood were exposed to seven different colonies of C. acinaciformis at a field site in the Northern Territory, Australia. The results indicated that balsa is susceptible to termite attack, with a mean mass loss of 30.9 % (range 3.8 – 99.9 %). Mean mass losses for radiata pine and southern blue gum were 90.3 and 98.9 % respectively. It was evident that balsa can be successfully protected from termite attack with envelope-treatments of bifenthrin, with the latter proving to be highly efficacious at mass/volume retentions much lower than those specified in AS 1604.1 and typically used in the Australian timber preservationindustry.

Item Type:	Article
Authors/Creators:	Kotlarewski, NJ and Derikvand, M and Lee, M and Nolan, G and Hague, JRB
Keywords:	Ochroma pyramidale, balsa, Coptotermes acinaciformis, bifenthrin, termite-susceptibility
Journal or Publication Title:	International Biodeterioration and Biodegradation
Publisher:	Elsevier Sci Ltd
ISSN:	0964-8305
DOI / ID Number:	https://doi.org/10.1016/j.ibiod.2019.01.003
Copyright Information:	Copyright 2019 Elsevier Ltd.
Related URLs:	UTAS Profile: Kotlarewski, NJ UTAS Profile: Lee, M UTAS Profile: Nolan, G
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