Comparison of the Laboratory and Field Efficacy of Insecticides Used for German Cockroach Control

Authors: Rust, Michael K.; Reierson, Donald A.

Source: Journal of Economic Entomology, Volume 71, Number 4, August 1978 , pp. 704-708(5)

Publisher: Entomological Society of America

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The activity of several experimental insecticides against Blattella germanica (L.) was compared with standard materials in exposure and choice tests. A formula, Potential for Effectiveness (PE), was devised to account for repellency and mortality produced by toxicants in choice tests and to rate the toxicant's effectiveness on a scale of −100 to 100. Diazinon and chlorpyrifos provided a PE of 100. The PE of the carbamates tested ranged from 56–97. Deposits of pyrethrum and SD-43775 were toxic but repellent and the PE was −20 to 14.

In field tests, 0.5% chlorpyrifos spray produced 96.7% reductions at 4 wk. Treatments with 1.1% propoxur produced 88.0% reductions, but field populations were increasing at 6 wk. Diazinon and bendiocarb spray failed to produce significant control.

Cockroaches from apartments where treatments of diazinon or bendiocarb produced unsatisfactory control were 14X resistant to diazinon and 3.4X resistant to bendiocarb (g/male). Compared to nonresistant laboratory strains, these materials were less effective against the field-collected cockroaches in choice tests. Behavioral avoidance to diazinon or bendiocarb was similar in both strains, but resistance apparently contributed to the reduced efficacy of each material.

Document Type: Research Article

Publication date: August 1, 1978

More about this publication?
  • 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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