Fly Trapping On The Ranges Of The Southwest

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The use of fly traps on the stock ranges of the Southwest has become somewhat extensive. In 1928 stockmen estimated the loss during that year from the screwworm fly and fleece-worm fly to be $10,000,000. In 1929 the Bureau of Entomology, in cooperation with a local ranchmen's trapping association, conducted tests upon the effectiveness of systematic fly trapping in reducing the number of flies on an area of approximately 200 square miles of ranch land in Menard County, Texas. In comparison with a similar untrapped area a reduction of 36.2 per cent of the fly population in the trapped area by reason of the trapping was indicated. The most effective bait was found to be two pounds of fresh meat to which is added two gallons of water, and nicotine sulphate at the rate of four cubic centimeters per gallon of water. The frequency of renewing baits and refilling bait pans with water is dependent upon weather conditions.

While systematic organized fly trapping activities give promise of a distinct reduction in screw-worm and fleece-worm losses, the present prospects are that effective control can only be brought about by a combination of destruction of carcasses and trapping supplemented by approved ranch practices, and the possible utilization of parasites and predators of these blow flies.

Document Type: Research Article

Publication date: December 1, 1930

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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