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Gypsy Moth (Lepidoptera: Lymantriidae) Population Control Using Mechanical Barriers and Contact Insecticides Applied to Tree Stems

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Stem applications of two contact insecticides (carbaryl and a water-based pyrethroid mixture containing fenvalerate and tetramethrin), two chitin-inhibiting benzoylphenylureas (BPU) (diflubenzuron and triflumuron), and three mechanical barrier devices were tested in 1984 for gypsy moth, Lymantria dispar (L.), population control (egg mass reduction) on moderately infested red oaks, Quercus rubra L., in Pennsylvania. Sprays applied directly to tree stems and to burlap refugia were tested. Barrier devices included maintained, but unsprayed, burlap refugia; a commercial sticky tape; and a loose insect-trapping adhesive. Gypsy moth density on burlap-banded and unbanded control trees increased by 54 and 190%, respectively. Stem and burlap sprays of BPU resulted in a ca. 50% reduction in egg masses. Burlap sprays of either carbaryl or the pyrethroid mixture appeared to inhibit population increase as did the maintained burlap refugia and both sticky barriers.

Document Type: Research Article

Publication date: October 1, 1986

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  • 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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