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Fourteen insecticides were evaluated for their initial biological activity in soil and also for persistence of biological activity under controlled laboratory conditions. To assess initial activity, 5 tests were conducted: direct contact toxicity to the test insects; toxicity in moist mineral soil; dry mineral soil; moist muck soil; and fumigant activity in soil. Persistence of biological activity was assessed over 36 weeks. First-instar nymphs of a common field cricket, Acheta (=Gryllus) pennsylvanicus (Burmeister), and adult picture-winged flies, Chaetopsis debilis (Loew), were used as the test insects. Aldrin, diazinon, and dieldrin were used as standard insecticides for comparison. All the materials were effective contact poisons, but a limited number performed well in soil.Soil moisture and type were important features infiuencing toxicity. In addition to aldrin, Dursban® (O,O-diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate) and bromophos gave consistently good results. Tests on the persistence of biological activity indicated that several of the experimental organophosphorus insecticides were highly residual in soil. Others were classified as moderately or slightly residual, with Dursban and bromophos in the latter category.
Document Type: Research Article
Publication date: February 1, 1970
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.