Evaluation of Insecticides To Reduce Maturation Feeding by Tomicus piniperda (Coleoptera: Scolytidae) in Scotch Pine

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Tomicus pinipcrda L., an economically important bark beetle in temperate regions of the Old World, was first discovered in the United States in July 1992. We evaluated effects of selected foliar insecticides on survival of beetles during maturation feeding in pine shoots. Beetles were caged on shoots of young Scotch pine, Pinus sylvestris L., before and after insecticide application in a Michigan plantation. We also determined number of shoots per tree infested by beetles after treatment with various foliar and ground-applied insecticides in a field study in Indiana. Shoot-feeding behavior and characteristics of shoots selected for maturation feeding were observed in both studies. Survival of beetles caged for up to 2 wk on trees treated with acephate, a mixture of acephate and bifenthrin, and imidacloprid was significantly lower than survival of beetles caged on untreated trees, regardless of whether beetles were caged before or after trees were sprayed. However, in the Indiana field study, numbers of shoots with tunnels were monitored at 4-wk intervals throughout the summer. Most of the products significantly reduced the number of tunneled shoots during any interval. Most maturation feeding tunnels were found in current-year shoots, 0.45-cm diameter, located in the upper and middle canopy levels.

Document Type: Research Article

Publication date: June 1, 1995

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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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