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Pitch Defects in Red Pine Associated with Unsuccessful Attacks by Ips spp.

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Vertical scars and catfaces on red pine in Virginia and West Virginia were shown to be associated with unsuccessful attacks by Ips spp. (mostly I. grandicollis Eichh.). The bark scars were directly over depressions on the surface of the wood which were directly over pitch defects buried in the wood under one to eight annual growth rings. The defects were composed of Ips nuptial chambers and egg galleries; pitch streaks that extended from a few inches to a foot above and below the gallery and horizontally into the heart-wood; and pitch pockets in most defects with galleries that were three inches or longer. The defects occurred at the beginning of the springwood or at the end of the summerwood. Both male and female beetle galleries were present beneath bark scars over two inches long. The phenomena are discussed in relation to the occurrence of red pine south of its natural range.

Document Type: Journal Article

Affiliations: Assistant Professor, Department of Entomology and of Forestry and Wildlife, Virginia Polytechnic Institute, Blacksburg, Va.

Publication date: May 1, 1964

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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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