Oak Mortality Caused by Repeated Gypsy Moth1 Defoliations in New Jersey2
Author: KEGG, JOHN D.
Source: Journal of Economic Entomology, Volume 66, Number 3, June 1973 , pp. 639-641(3)
Publisher: Entomological Society of America
Abstract:Porthctria dispar (L.) was first reported in the Newark Watershed in 1968. During 1969 and 1970, nearly all favorable host trees sustained 75-100% defoliations on the 17,855 acres of the study area. Oak mortality increased from 6,5% in 1968 to 63.4% in 1972. Mortality rates for white oak, Quercus alba L.; chestnut oak, Q. prinus Willd; red oak, Q. rubra L.; scarlet oak, Q. coccinca Muenchh.; and black oak, Q. velutina Lam. were 84.1,66.0, 41.1, 27.3, and 47.5%, respectively. An estimated 1,143,911 trees were lost. The net basal area loss for all trees was 44.1%. Mortality among less-favored tree species remained mostly below 6% throughout the 5-year study.
Document Type: Research Article
Publication date: June 1, 1973
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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