Comparison of Slug (Mollusca: Pulmonata) Trapping in N0-Till Alfalfa

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A comparison of dellned-area traps (DATs)and refuge traps (RTs), in no-till alfalfa (Medicago sativa L.) to census the slug species Deroceras reticulatum (Müller), Deroceras laevae (Müller), and Arion fasciatus (Nielson) was made. The objective of the study was to determine whether RTs could be used in a range of crop densities and climatic conditions to assess slug density. In relation to slug density measured by DATs, RTs were less effective in trapping slugs in spring, when D. reticula tum was very small, but trapped relatively higher numbers than DATs when slugs were larger. Trapping methods were assessed between May and November in no-till alfalfa plots with plant densities ranging from 52 to 99% total plant cover in May to 78 to 91%cover in July. Alfalfa crop density had no effect upon RT catches except in dry conditions in June, when RTs collected more slugs in plots with most vegetation cover. Neither trap collected slugs during Severe drought conditions in July when soil moisture content in the top 5 cm of the soil profile dropped to about 6%.

Document Type: Research Article

Publication date: June 1, 1993

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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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