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A Discriminant Function for Identifying Mixed-Oak Stand Susceptibility to Gypsy Moth Defoliation

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Data from 121 stands considered susceptible or resistant to defoliation by gypsy moths were used in computing a discriminant function. The variables of the discriminant function reflect the quantity and quality of certain structural features of trees in forest stands that are used by the gypsy moth for resting, pupation, and oviposition. The susceptibility of a stand can be identified based on the value of its discriminant score. The estimated probabilities of misidentification are 0.104 and 0.136 for susceptible and resistant stands, respectively, within the endemic range of the gypsy moth. Forest Sci. 25:468-474.

Keywords: Lymantria dispar; Quercus spp; insect habitat; tree-structural features

Document Type: Journal Article

Affiliations: Principal Plant Pathologist, U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, Forest Insect and Disease Laboratory, Hamden, Connecticut 06514.

Publication date: 1979-09-01

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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