The synthetic pyrethroid, permethrin, provided excellent control of 3rd and 4th instars of Culex pipiens quinquefasciatus Say, psorophora columbiae (Dyar and Knab), and Aedes vexans (Meigen) in the laboratory. The effective 24 h concentration in laboratory larvicide studies against C. P. quinquefasciatus,P. columbiae, and A. vexans was 1.25−1, 2.50−2, and 2.50−2 ppm, respectively. In 6.1×6.1-m rice plot larvicide tests against P. collumbiae larvae, the rate of 11.22 g AI/ha was effective when larvae were introduced in 1 h posttreatment. At 24 and 48 h posttreatment, 168.12 g AI/ha was required to give 90% control. After 72 h, the rate required for 80% control was 280.2–560.4 g AI/ha with only the 560.4 g AI/ha rate being effective after 96 h. When permethrin was evaluated against adult Anopheles quadrimaculatus Say, P. columbiae, and C. P. quinquefasciatus exposed in a wind tunnel, 24-h LC50's were 32.0-, 2.0-, and 9.6-fold more effective than malathion for each species, respectively. ULV applications by truck-mounted aerosol generators at the rate of 2.91 g AI/ha produced over 90% mortality in caged C. P. quinquefasciatus placed at various down wind positions.
Document Type: Research Article
Publication date: December 1, 1977
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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.