. Cooperative economic insect report. Beneficial insects; Insect pests. HOUSE FLY (Musca domestlca) - ALABAMA - Noticeable absence In Sumpter County; populations below average for time of year. (Cranberry). UTAH - Appeared about farms and communities, generally in northern area. (Knowlton). Face Fly Activity to April 27 / >. FACE FLY (Musca autumnalis) - MASSACHUESTTS - Abundant and very annoying to people outdoors in semi-rural area in western part of State. (Wheeler), MARYLAND - Population density on dairy cattle at Beltsville, Prince Georges County, ranged - per head on April 25.
. Cooperative economic insect report. Beneficial insects; Insect pests. HOUSE FLY (Musca domestlca) - ALABAMA - Noticeable absence In Sumpter County; populations below average for time of year. (Cranberry). UTAH - Appeared about farms and communities, generally in northern area. (Knowlton). Face Fly Activity to April 27 / >. FACE FLY (Musca autumnalis) - MASSACHUESTTS - Abundant and very annoying to people outdoors in semi-rural area in western part of State. (Wheeler), MARYLAND - Population density on dairy cattle at Beltsville, Prince Georges County, ranged - per head on April 25. In Montgomery County, populations averaged per head on dairy cattle at Rockville; per head on beef cattle at German- town; and 19 per head on dairy cattle at Redland. First observation of pest at Germantown April 19. (J. H. Fales, 0. F. Bodenstein). VIRGINIA - Adults noted at Jewel Ridge, Tazewell County, on April 25. Swarmed at Blackstaurg, Montgomery County, on April 26, apparently emerging from hibernation in a church. Detected in several northern counties; infestations ranged from occasional fly to average of 7 per animal. Counties reporting activity included: Shenandoah, Page, Rappahannock, Madison, Orange, Green, Albemarle, Augusta, Roanoke, Craig, Rock- bridge, Botetourt and Montgomery. The first 10 counties are new coimty records for the State. (Turner, Rowell, Tarpley). ILLINOIS - Generally present in small numbers on herds of cattle throughout northern three-foiorths of State; egg laying to produce first summer buildup occurring. Controls recommended to dairymen and beef producers. (Ill, Ins. Sur, Bui.). CATTLE LICE - OKLAHOMA - Several species continue active in eastern half of State; controls necessary in Wagoner County. (Okla. Coop. Sur.). CATTLE BITING LOUSE (Bovicola bovis) - NORTH DAKOTA - Of 9 animals observed in stockyard at Mayville, Traill County, 3 lightly infested (an occasional louse found on parting hair). (Wilson, Brandvik). HOG LOUSE (Haemato
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