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Estimating Beetle-Killed Douglas-Fir by Aerial Photo and Field Plots

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Abstract:

Color and panchromatic aerial photographs provide a reliable means for estimating epidemic tree killing by the Douglas-fir beetle (Dendroctonus pseudotsugae [Hopk.]). For this purpose, color photographs are more efficient than panchromatic. Sequential color photography taken annually may be used to record the course of an epidemic. By regression sampling, taking a large number of inexpensive photo plots and ground checking a small number of expensive field plots, a survey of equal accuracy is obtained at less cost than by a straight field survey. A procedure is outlined for conducting aerial photo-graphic surveys of Douglas-fir beetle epidemics.

Document Type: Journal Article

Affiliations: Project Forester with Weyerhaeuser Company, Centralia, Wash.

Publication date: May 1, 1964

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

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