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Soil Moisture and Stand Density affect Oleoresin Exudation Flow in a Loblolly Pine Plantation

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Oleoresin exudation flow (OEF) is a useful expression of resin production in the study of tree resistance to bark beetles. In a 12-year-old plantation of loblolly pine (Pinus taeda L.), changes in soil moisture availability accounted for 34 percent of the summer fluctuations in mean OEF; however, simulated soil drought alone did not significantly affect the mean OEF of a small sample of trees. Mean flow rates were reduced more by overstocking in the stand than by temporary soil moisture stress. Unthinned parts of the stand had a much larger proportion of trees in the lowest OEF class than did the thinned plantation. Forest Sci. 17:170-177.

Keywords: Ips spp; Pinus taeda; bark beetles; stand density; tree resistance

Document Type: Journal Article

Affiliations: Forest Insect Ecologist, Forestry Sciences Lab., Pacific Northwest Forest and Range Exp. Sta., USDA Forest Service, Corvallis, Oreg.

Publication date: June 1, 1971

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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