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Behavior of Dieldrin in Soil: Laboratory Studies on the Factors Influencing Biological Activity1

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Abstract:

A study was conducted to clarify the major factors influencing the biological activity of dieldrin in soil. Directcontact- toxicity bioassays indicated that dieldrin was an effective broad spectrum contact insecticide which was as toxic or more so than aldrin to 1st-stage nymphs of the common field cricket, Gryllus pennsylvanicus (Burmeister) ; adult picture-winged flies, Chaetopsis debilis (Loew); and 3rd- to 4th-stage black cutworms, Agrotis ipsilon (Hufnagel). In moist mineral soil, it was effective but less so than aldrin. Soil type was the major factor influencing biological activity. In moist soils dieldrin toxicity decreased linearly with increasing organic content. In dry soils, activity appeared to decrease with increasing clay content. Soil temperature and moisture were factors of secondary importance. Biological activity was positively correlated with increasing temperature in moist and dry mineral soil and in muck. The most pronounced temperature effect occurred in the dry mineral soil. Biological activity was positively correlated with increasing moisture in mineral soils, white the reverse occurred in muck soil. Volatility of dieldrin in soil was also positively correlated with increasing soil temperature.

Document Type: Research Article

Publication date: February 1, 1972

More about this publication?
  • 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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