Increasing Blatticidal Efficacy with Aggregation Pheromone

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Chlorpyrifos, diazinon, and propoxur were tested for repellency and efficacy against German cockroaches, Blattella germanica (L.). Repellency of each material was determined by using a relative avoidance index (RAI) and was directly proportional to concentration. Avoidance to each toxicant decreased significantly and mortality increased in choice tests when an extract of aggregation pheromone (AP) was added. Chlorpyrifos (0.25% + AP) and diazinon (0.5% + AP) produced significantly higher mortality than any toxicant alone.

In field control tests in apartments infested with German cockroaches, chlorpyrifos (0.5%) and Knox-Out® (1.0%) produced over 90% reductions within 4 wk, but diazinon (0.5%) and flowable microencapsulated diazinon (Knox-Out® 2 FM) (0.5%) failed to produce significant control within 2 wk after treatment; chlorpyrifos (0.25%) produced only partial control. However, similar concentrations of each material + AP produced 78.4, 82.0, and 90.7% reductions at 2 wk, respectively.

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.
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