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Ponderosa Pine Tree Classes Redefined

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This article presents a redefinition of the tree classes proposed by the author in 1936 for determining the susceptibility of ponderosa pines to bark beetle attack. It is based on additional study of 3,700 trees and should assist in placing borderline trees in the class most nearly representing their rate of growth and mortality risk.

Document Type: Journal Article

Affiliations: Senior Entomologist, Bureau of Entomology and Plant Quarantine, U.S. Department of Agriculture, Berkeley, Calif.

Publication date: April 1, 1943

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  • 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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