Toxicological Studies on Cutworms. III. Laboratory Investigations on the Toxicity of Insecticides to the Black Cutworm, with Special Reference to the Influence of Soil Type, Soil Moisture, Method of Application, and Formulation on Insecticide Activity1

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Abstract:

Laboratory studies indicated that only 2 insecticides, endrin and DursbanĀ® (O,O-diethyl 0-3,5,6-trichloro-2-pyridyl phosphorothioate) , of 18 tested as direct-contact poisons against 3rd- to 4th-instar larvae of the black cutworm, Agrotis ipsilon (Hufnagel), were more effective than aldrin. Seven other materials were only slightly less effective than aldrin, while the remainder were considerably less effective. The larval instars showed a marked difference in tolerance to aldrin and Dursban and became increasingly tolerant with each successive instar. Tests with technical formulations applied to the surface of a moist sandy loam indicated that Dursban, Bayer 37289 (O-ethyl O-2,4,5-trichlorophenyl ethylphosphonothioate) , and parathion showed promise as soil treatments. Subsequent tests indicated that soil moisture, soil type, method of application, and formulation were all factors influencing the toxicity of insecticide-soil treatments.

Document Type: Research Article

Publication date: August 1, 1968

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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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