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Predicting Resurgence of Western Flower Thrips (Thysanoptera: Thripidae) on Onions After Insecticide Application in the Texas High Plains

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Population resurgence of western flower thrips, Frankliniella occidentalis (Pergande), was observed on onions after insecticide application during two growing seasons on the Texas High Plains. Regression models were used to quantify variables influencing western flower thrips population dynamics. Thrips densities increased exponentially after being sprayed with insecticide. This resurgence was aided by degree-days (DD) between thresholds of 5 and 35°C accumulated after insecticide application, whereas accumulated DD above a threshold of 35°C greatly hindered increase. Density of western flower thrips on onions was predicted by DD and rainfall accumulations.

Document Type: Research Article

Publication date: April 1, 1987

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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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