Studies on the Control of the Alfalfa Snout Beetle Larva1

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Application of heptachlor or dieldrin in the seeding year, at rates of 3 to 5 pounds of actual toxicant per acre, gave effective protection to alfalfa stands for at least 2 years, from the attack of the larva of the alfalfa snout beetle, Brachyrhinus ligustici (L.) (Cureulionidae: Coleoptera). Laboratory trials indicated that the egg and adult stages are more susceptible to practical dosages of insecticides than the late larval stage. Plant protection, therefore, is believed to be the result of adult and egg kill combined, probably, with kill of newly batched larvae.

Granulated dieldrin applied prior to the beginning of spring growth produced some residue on first cutting hay.

Document Type: Research Article

Publication date: October 1, 1958

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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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