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Use of Sticky Traps and Limb Jarring to Aid in Pest Management Decisions for Summer Populations of the Pear Psylla (Homoptera: Psyllidae) in Connecticut

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Effectiveness of Lightning Yellow sticky traps for monitoring summer populations of adult pear psylla, Psylla pyricola Foerster, was evaluated at three heights, three orientations, and in four quadrants of pear trees. Traps placed at a height of 1.2 to 1.8 m aboveground in the south quadrant of pear trees were more significantly correlated with pear psylla egg and nymph infestations than other trap positions tested. Vertically positioned traps captured significantly more pear psylla than horizontal traps. Trap captures from all orientations were significantly correlated with egg and nymph infestations. Relationships between trap and limb jarring counts of adults and infestations of eggs and nymphs were determined by regression analyses. Both adult monitoring methods were equally effective in predicting shoot infestations of eggs and nymphs. The action thresholds for either eggs or nymphs were very similar. Based on the nymph data, action thresholds of 4.4 to 6.9 pear psylla per trap per day or 1.0 to 1.2 per limb jar are suggested for adult monitoring.

Document Type: Research Article

Publication date: October 1, 1989

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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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