Accession Number:

AD0747237

Title:

A Preliminary Investigation of the Marine Borer Resistance of the Tropical Wood Dalbergia Retusa.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Bultman,J. D.
• Southwell,C. R.

Report Date:

1972-06-28

Pagination or Media Count:

16.0

Abstract:

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

Descriptors:

• (*WOOD
• PROTECTION)
• (*MARINE BORERS
• WOOD)
• TROPICAL REGIONS
• DAMAGE
• PANELS
• ALCOHOLS
• FUNGI
• LIGNIN
• CELLULOSE

Subject Categories:

• Wood, Paper and Related Forestry Products

Distribution Statement:

APPROVED FOR PUBLIC RELEASE