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Insecticidal Susceptibility of Nysius raphanus, a Pest of Cotton1

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An outbreak of Nysius raphanus Howard occurred in the San Joaquin Valley of California during the spring of 1959 and 1960. Population build-up occurred on Sisymbrium irio L., Capsella Bursa-pastoris (L.) Medic. and Lepidium nitidium Nutt. Migration to cotton occurred in mid-May, with resultant destruction of seedling plants. In field experiments endrin and heptachlor gave satisfactory control while Sevin® (1-naphthyl methylcarbamate) was relatively ineffective. In laboratory experiments using a bioassay vial method of exposure, the approximate micrograms of several toxicants needed to give 50% mortality were: malathion 0.0017, dieldrin 0.3, endrin 1.0, Dipterex® (dimethyl 2,2,2- trichloro-1-hydroxyethylphosphonate) 1.6, toxaphene 30, DDT 80, and Sevin 50. Laboratory results with Sevin were erratic and inconclusive.

Document Type: Research Article

Publication date: February 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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