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Chemical Control of Slugs in Orchard Grass-Ladino White Clover Pastures in the Pacific Northwest1

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Experiments were conducted in Western Washington on the control of slugs affecting orchard grass-ladino white clover pastures. Slug populations for the most part consisted of Deroceras agreste (Linnaeus) and Arion ater (Linnaeus) although several other species were found. The best method of determining slug populations in pastures involved the use of boxes. It was found that slugs would seek shelter under upturned boxes during the day if the boxes were made light-proof. It was demonstrated that slugs could destroy ladino white clover in a single growing season. Slug populations varied greatly within a season. The slug Population was greatly increase at the surface by over head irrigation. When colloidal suspensions of metaldehyde were pumped into the irrigation system at this time, seasonal control of slugs was obtained.

Document Type: Research Article

Publication date: August 1, 1961

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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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