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Effect of Gypsy Moth Defoliation on Certain Forest Trees

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To determine economic injury by the gypsy moth to forest trees in the New England States, records of defoliation, death of trees and loss of diameter increment were collected from trees in a wide series of plots from 1912 to 1921. Data from the oaks and white pine--species suffering greatest economic injury--show that an increase in average defoliation was associated in general with an increase in mortality. Growth and defoliation data of four species of oaks and white pine show a direct correlation between percentage of defoliation and decline in radial increment. Diameter growth of black, white and scarlet oaks was found to fluctuate inversely with percent of defoliation the same year defoliation occurred. In young white pines defoliated only once there was direct correlation between percent of defoliation and percent of trees dying during the following nine-year period.

Document Type: Journal Article

Affiliations: Bureau of Entomology and Plant Quarantine

Publication date: December 1, 1941

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.

    2015 Impact Factor: 1.476
    Ranking: 22 of 66 in forestry

    Also published by SAF:
    Forest Science
    Other SAF Publications
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