Timing of Trunk-Implanted Acephate for Protection of Douglas-Fir from Defoliation by the Western Spruce Budworm
Authors: Koerber, Thomas W.; Sandquist, Roger E.
Source: Western Journal of Applied Forestry, Volume 3, Number 4, 1 October 1988 , pp. 126-128(3)
Publisher: Society of American Foresters
Abstract:The effectiveness of implanting acephate in boles of superior Douglas-fir (Pseudotsuga menziesii var. glauca) to protect them from defoliation by western spruce budworm (Choristoneura occidentalis) and spruce cone-worm (Dioryctria reniculelloides) was investigated. April treatment afforded greater foliage protection than May treatment. November treatment was as effective as April in protecting trees from defoliation. Treatment in fall would be more efficient than in spring because of better road access and more favorable weather conditions. West. J. Appl. For. 3(4):126-128, October 1988.
Document Type: Journal Article
Affiliations: Pacific Northwest Region, USDA Forest Service, Portland, OR 92708
Publication date: October 1, 1988
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