Synergistic effect of heartwood extractives and quaternary ammonium compounds on termite resistance of treated wood

This study evaluates the synergistic effect of wood extractives and quaternary ammonium compounds (QACs) on the resistance to termites of several treated wood species. Wood specimens from different natural durability classes were extracted with either hot water alone or hot water + ethanol/benzene....

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Bibliographic Details
Published in:Pest management science 2007, Vol.63 (1), p.90-95
Main Authors: Hwang, W.J, Kartal, S.N, Yoshimura, T, Imamura, Y
Format: Article
Language:English
Subjects:
Ammonia
Animals
Biological and medical sciences
Chamaecyparis
chemical constituents of plants
Coniferophyta
Coptotermes formosanus
Cryptomeria
Drug Synergism
extractives
forest trees
Fundamental and applied biological sciences. Psychology
heartwood
insect pests
insecticidal properties
Isoptera
Larix
Pest control
Phytopathology. Animal pests. Plant and forest protection
Plant Extracts
Protozoa. Invertebrates
Pseudotsuga
Pseudotsuga menziesii
Quaternary Ammonium Compounds
storage pests
termite control
termite resistance
Termites
termiticides
Trees
Tsuga
Tsuga heterophylla
Wood
wood products
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Summary:This study evaluates the synergistic effect of wood extractives and quaternary ammonium compounds (QACs) on the resistance to termites of several treated wood species. Wood specimens from different natural durability classes were extracted with either hot water alone or hot water + ethanol/benzene. The extracted and unextracted wood specimens were treated with either didecyldimethylammonium tetrafluoroborate (DBF) or commercial didecyldimethylammonium chloride (DDAC) solutions and then exposed to subterranean termites, Coptotermes formosanus Shiraki, for 3 weeks under laboratory conditions. The results showed that extractives of the heartwood portions of the wood species contributed to increased resistance against termite attack in the presence of either DBF or DDAC wood preservatives. The synergistic effect of wood extractives and DBF was much clearer with Pseudotsuga menziesii (Mirbel) Franco and Tsuga heterophylla Sarg wood samples. Further studies are needed for a better understanding of the synergism between wood extractives and either DBF or DDAC using both the sapwood and heartwood portions of the same wood species.
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.1294