Decay Resistance in Redwood: (Sequoia Sempervirens) Heartwood as Related To Color and Extractives

W. Wayne Wilcox, Douglas D. Piirto


Decay resistance and water-soluble and ethanol-soluble extractive contents were determined for redwood heartwood boards having a full range of natural color variation. Decay resistance and ethanol-soluble extractive content were greatest in the darkest boards. Water-soluble extractives varied inconsistently with board color and decay resistance. Correlation analysis showed that as much as 69% of the variation in weight loss could be accounted for by ethanol-soluble extractive concentration.


Biodegradation;soil-block tests;extractive content

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