Effect of Past European Pine Shoot Moth Infestations on Volume Yield of Pole-Sized Red Pine
Abstract:As the first step in assessing European pine shoot moth (Rhyacionia buoliana) impact on volume yield in red pine (Pinus resinosa), a regression was devised for estimating mean population per tree retrospectively in pole-sized plantations. Predictors were percentage of trees with residual injury signs at a given height and time since injury. Yearly late-larval densities were then estimated for past years in one 0.016-ha plot in 25 additional plantations 16 to 30 years old. The three highest estimated yearly densities per plot averaged 1 to 29. Estimated densities peaked early in plantation development, usually at tree heights less than 2 m; subsquent declines are attributed to winter mortality above snow depth as the trees aged. Observed dbh, total height, and cubic volume/ha on plots did not differ significantly from expected values obtained with a red pine growth and yield model. A negative relation between observed-expected total height ratios and estimated insect density means was almost significant statistically, but relations involving dbh and cubic volume/ha ratios clearly were not. Impact on volume yield for the reconstructed population densities apparently was negligible. Pole-sized trees have sufficient time to overgrow early injury; between years 10 and 18 after injury about 30 percent of residual injury signs disappeared. Long-term impact on volume yield by terminal-feeding insects should not be assumed without appraisal based on impact-density correlations. Forest Sci. 24:543-550.
Document Type: Journal Article
Affiliations: Forester, U.S. Army Corps of Engineers, St. Paul, Minnesota 55101
Publication date: December 1, 1978
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- 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
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