Evaluation of Five Techniques for Recovering Postlarval Stages of Chiggers (Acarina: Trombiculidae) from Soil Habitats

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Five methods for recovering the deutonymph and adult stages of the chigger mite Eutrombicula splendens Ewing were compared. Three of these involved flotation of soil and litter in either a magnesium sulfate solution or tap water; one flotation method used a modified Ladell apparatus. Two extraction methods involved Tullgren funnel extractors, either with or without lights. We recovered more than 90% of the mites with magnesium sulfate and tap water flotation and Tullgren funnels with lights. Tullgren funnels with lights was the most effective method, with the lowest mortality rates and the least labor input. A calculated "extraction half-time" is proposed for estimating recovery times for post larval chiggers from Tullgren funnels.

Document Type: Research Article

Publication date: February 1, 1984

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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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