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This study was conducted to determine the inherent variability of insecticide-treated glass tubes and filter paper disks, two methods currently being used to measure insecticide resistance in adult horn fly, Haematobia irritans (L.), populations. Flies were exposed to glass or filter paper surfaces treated with an LC50 concentration of permethrin, fenvalerate, diazinon, or pirimiphos methyl. Mortality was determined by five or six individuals. In all cases, there was a significant difference among surfaces treated with the same insecticide, and there was a significant difference in the horn fly mortality recorded by different individuals. These results suggest that testing wild horn fly populations of mixed ages for insecticide resistance May only represent an indication of resistance in the population. The observed variability among individuals reinforces the dogma that one person should be responsible for data collection during experimental procedures.
Document Type: Research Article
Publication date: June 1, 1995
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.