Pecan Weevil: Toxicity of Insecticides in Laboratory Tests

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Seventeen insecticides were evaluated in the laboratory, Using the nut-dip and residual-plate methods, against Curculio caryae (Horn), Dialifor, monocrotophos, carbofuran, carbaryl, malathion, methyl parathion, oxydemeton methyl, EPN (O-ethyl O-(p-nitrophenyl) phenylphosphonothioate), and phosalone exhibited high toxicities at the higher (600 ppm) rate. EPN and phosalone showed low toxicities at the low (300 ppm) rate.

Relative toxicities of the insecticides were similar in both test methods except for disulfoton which exhibited low toxicity in the plate study and high toxicity in the nut-dip test; and Imidan= (O,O-dimethyl phosphorodithioate Sester with N-(mercaptomethyl)-phthalimide was the reverse. Monocrotophos and carbofuran were the only compounds showing residual activity at both 1 and 5 days.

Document Type: Research Article

Publication date: April 16, 1973

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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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