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The Impact of Gypsy Moth: Repeated Defoliation of Oak in New Jersey

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Abstract:

The gypsy moth (Porthetria dispar, L.) is now a problem in New Jersey. Repeated defoliations of oaks (Quercus spp.) began in the 1,350-acre Morristown National Historical Park in 1967. Within two years, 28 percent of the oaks were dead. Most vulnerable to loss were: northern red oak (Q. rubra), white oak (Q. alba), and scarlet oak (Q. coccinea) between 6 and 12 inches dbh and trees in excess of 26 inches. Where oaks predominate and no insecticides are applied, salvage logging must begin after the second consecutive year of heavy defoliation.

Document Type: Journal Article

Affiliations: Entomologist, Div. of Plant Industry, New Jersey Dep. of Agriculture, Trenton

Publication date: 1971-12-01

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

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