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Role of Crayfish (Decapoda: Astacidae) as Pests of Rice in California and their Control

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Studies in 3 successive years with Procambarus clarki (Girard) in rice fields showed significant reductions in rice seedling establishment when the associations were both as natural and confined populations. The natural infestations resulted in seedling reductions of 70 to 100%, whereas confined crayfish caused losses in seedlings ranging from 9% at 0.34 crayfish per m2 to 94% at 2.4/m2. Methyl parathion at 566.5 g/ha was highly effective in controlling P. clarki and Orconectes virilis (Hagen). Fenthion at 112.1 g/ha resulted in high mortality of the former species but not the latter.

Document Type: Research Article

Publication date: August 1, 1982

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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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