Tomato Production in Maryland: Effect of Different Densities of Larvae and Adults of the Colorado Potato Beetle

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Tomato production (yield and height) was substantially reduced by 1st-generation larvae of Leptinotarsa decemlineata (Say) which fed on the plants when they were susceptible to injury. Increases in production of green fruit were negatively correlated with decreasing plant damage. There also were significant negative correlations between yield and plant damage and positive correlations between yield and plant height. When caged tomato plants were infested with initially 1 adult/2 plants. I adult/plant, or 2 adults/plant, yields always were reduced ca. 84%. Acceptable yields resulted when an efficient monitoring system was used to insure proper timing of sprays for control of overwintering adults and 1st-generation Colorado potato beetle larvae.

Document Type: Research Article

Publication date: December 1, 1979

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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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