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Pea Moth Control in Field Peas with Insecticides and the Effect on Crop Yield

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In field trials, 11 insecticides were tested against larvae of Laspeyresia nigricana (Stephens) infesting field peas grown for livestock feed or for sale as certified seed. Sprays with carbofuran reduced larval damage by 70% in 1975, and in 1976 sprays with WL 43775 (Benzeneacetic acid, 4-chloro-alpha- (1-methylethyl) -, cyano (3- phenoxyphenyl) methyl ester) reduced damage by 75% Methomyl, dimethoate, NRDC-143 (3-phenoxybenzyl (±) -cis, trans-2, 2-dimethyl-3- (2,2-dichlorovinyl) cyclopropane carboxylate), and WL 43479 (3-phenoxybenzyl 2- (2,2-dichlorovinyl) -3,3-dimethylcyclopropane-1-carboxylate) also resulted in significant reductions in pea moth larval damage. Granular soil treatments reduced the % of damaged peas one year but not the other. Despite reduced pea moth injury through use of insecticides, total yields of the field peas were not affected in these tests. However, the control achieved was not sufficient to meet required quality standards for sale as certified seed in Canada.

Document Type: Research Article

Publication date: August 1, 1977

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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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