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Kansas Agricultural Experiment Station
ABSTRACT
Flies are such a serious pest to livestock that most stockmen make some effort to control them. On dairy farms, the problem is especially important due to the danger of contaminating milk. The United States Public Health Service has recognized the problem by prescribing regulations for approved dairy farms where Grade A milk is produced (18). Two general methods of control are usually recommended (3, 14): 1. elimination of breeding places, and 2. systematic killing of large numbers of flies. Frequent removal of manure by spreading it on field, elimination of stack bottoms, damp piles of feed or waste material together with utmost cleanliness inside the barn will greatly reduce the numbers of flies. On most farms more emphasis is placed on killing methods than the prevention of breeding. Killing methods include such recommendations as poison bait, traps, electric screens, spraying, or a combination of two or more such methods.
1 This publication is a report on some phases of a cooperative investigation supported by the establishment of a fellowship at the Kansas Agricultural Experiment Station, June, 1940, by the Hercules Powder Company, Wilmington, Delaware. Associated in the general outline and supervision of the investigation were Mr. Friar M. Thompson, Jr., Entomologist, Hercules Powder Company and Dr. Roger C. Smith, Entomologist, Prof. F. W. Atkeson and Dr. A. O. Shaw, Dairy Husbandry, Kansas Agricultural Experiment Station. Graduate Assistants appointed to this fellowship were Floyd J. Holmes, Department of Entomology in 1940 and A. Russell Borgmann, Department of Dairy Husbandry in 1941.
2 Contribution no. 143 from the Department of Dairy Husbandry, and no. 512 from the Department of Entomology.
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