A Preliminary Investigation of the Marine Borer Resistance of the Tropical Wood Dalbergia Retusa.
NAVAL RESEARCH LAB WASHINGTON D C
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The wood of the tropical tree Dalbergia retusa Cocobolo was the most resistant to marine boring organisms of 113 species tested in an 8-year tropical exposure study. The first step toward identifying the constituents affording such high resistance has been taken. Panels of Dalbergia retusa were extracted with one of three solvents--ethanol, acetone, or toluene--and exposed to marine borer activity in Panamanian waters. All of the alcohol- and acetone-extracted panels were severely damaged by borers the toluene-extracted panels were much less damaged. None of the extracts was able to confer protection to highly susceptible Southern yellow pine, possibly because of heat inactivation of the protective component, an insufficient quantity of this material deposited in the pine, or both. Author
- Wood, Paper and Related Forestry Products