Flotation Technique for Extracting Eggs of Diabrotica spp. and Other Organisms from Soil

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A simple, rapid, inexpensive method of extracting eggs of Diabrotica spp. and other soil fauna from soil by utilizing flotation has been devised. Such use of flotation is not a new technique. Kevan (1962) stated that in 1936 W. R. S. Ladell utilized a magnesium sulfate solution upon which to float soil arthropods. Since then different workers have used several types of apparatus and solutions. Most involve a complicated combination of sieves and funnels. In general, they are designed to aid in survey work in which viability of specimens after extraction is not important. Salt solutions containing magnesium sulfate, sodium chloride, or potassium bromide are most commonly used for flotation. However, in collecting nematodes Coveness and Jensen (1955) utilized a centrifugal flotation of soil in sugar solution.

Document Type: Research Article

Publication date: February 1, 1966

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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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