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Impact and Management of Late-Season Populations of the Colorado Potato Beetle (Coleoptera: Chrysomelidae) on Potato in Connecticut

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Experiments were conducted during three seasons to quantify the relationship between yields of late-maturing potato variety and variation in densities of second-generation larvae of the Colorado potato beetle (COB), Leptinotarsa decemlineata (Say), in Connecticut and to develop alternative strategies to regular insecticide applications for maintaining commercially acceptable second-generation COB densities. In the most extreme case, after first-generation CPB densities were reduced ≤6 per stem, the second CPB generation attained a density of nearly 20 per stem without affecting yields. A pest management program, including different treatment guidelines for first- and second-generation larvae in conjunction with antioxidant fungicides, allowed full yield production without the need for any insecticide applications during the second larval generation. Antioxidant fungicides alone suppressed second-generation larvae well below densities necessary to cause yield reductions.

Document Type: Research Article

Publication date: June 1, 1988

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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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