Bioactivity and Persistence of Some New Insecticides in a Mineral Soil1

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Abstract:

Microplot field tests were set up to dctermine the bioactivity of granular formulations of 12 candidate or registered insecticides banded % in. deep in a mineral soil. Samples were collected at intervals and bioassayed in a greenhouse with lanae of the cabbage maggot, Hylemya bmssicae (bouchc). Some materials, as propoxur and Zinophos®, (O,O-diethyl 0-2-pyrazinyl phosphorothioate) were most bioactive within 3 days after application in the soil, and bioactivity decreased to non detectable le\'e1s in I to 3 months. Other compounds, as Bay 37289 (O -ethyl 0-2,4,5-trichlorophenyl ethylphosphonothioate), chlorfen- vinphos (2 -chloro -1- (2,4- dichlorophenyl) vinyl diethyl phosphate), and Dyfonate® (O-ethyl S-phenyl ethylphosphonodithioate), except for some initial toxicity, were slowly bioactivated, toxicity increased during the growing season, and toxic ants present in the fall persisted at a relatively constant level throughout the winter and spring. Carbofuran and Danit® (O,O-dimethyl O-[p - Methylsul-. finyl) phenyl] phosphorothioate), were most toxic to test organisms 30 days after soil application, toxicity gradually declined thereafter, and toxic residues were barely detectable the following spring.

Document Type: Research Article

Publication date: August 1, 1971

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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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