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Bioactivity and Persistence of Some Parathion Formulations in Soil1,2

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The persistence and biological activity of parathion in soil was studied under laboratory and field conditions. Microbial breakdown appeared to be the major contributor to the loss of parathion in soil. Although moisture and soil type influence parathion degradation, this influence is mediated primarily by the activity of microorganisms.

Highest biological activity against larvae of the western corn root worm, Diabrotica virgifera LeContc, on soil was achieved with broad distribution and minimum binding of parathion (e.g., 1 % kaolinite dust; LD50 = 0.05 ppm) whereas low activity was associated with tightly bound, thinly distributed formulations (e.g., 10% on charcoal; LD50 = 6.0 ppm). However, chemical assays of soil showed that the dust was the least persistent and the charcoal the most persistent formulation (50% breakdown in 6 days vs. 72.days, respectively).

Document Type: Research Article

Publication date: April 1, 1972

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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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