Examples of mortality and reduced annual increments of white fir induced by drought, insects, and disease at different stand densities.

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Publication Information

Title:	Examples of mortality and reduced annual increments of white fir induced by drought, insects, and disease at different stand densities.
Author(s):	Cochran, P.H.
Date:	1998
Source:	Res. Note PNW-RN-525. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 19 p
Station ID:	RN-PNW-525
Description:	Mortality between 1991 and 1995 destroyed a levels-of-growing-stock study installed in four widely separated blocks in the Deschutes and Fremont National Forests in Oregon. Mortality at one block was attributed to root rot (Armillaria ostoyea (Romagnesi) Herink) and western spruce budworm (Choristoneura occidentalis Freeman). Mortality at the other blocks was due to fir engraver beetles (Scolytus ventralis LeConte). Stand densities under investigation were low.
Keywords:	White fir, stand density, mortality, periodic annual increments, fir engraver, Modoc budworm, root rot, western spruce budworm
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Citation

Cochran, P.H. 1998. Examples of mortality and reduced annual increments of white fir induced by drought, insects, and disease at different stand densities.. Res. Note PNW-RN-525. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 19 p

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Last Modified: January 12, 2009