. Cooperative economic insect report. Insect pests Control United States Periodicals. - 319 - DISTRIBUTION OF FACE FLY. Face fly activity was observed in WISCONSIN in mid-May. It was soon troublesome in Sauk and Grant Counties and later over most of the State. Face fly was particularly troublesome in Bayfield and Ashland Counties, reportedly causing blindness in some cattle. Reports of activity in Wisconsin were received until late September. The first specimens of the season in ILLINOIS were observed on cattle in Mercer County May 5. Populations were rather low through June and July, usually
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 319 - DISTRIBUTION OF FACE FLY. Face fly activity was observed in WISCONSIN in mid-May. It was soon troublesome in Sauk and Grant Counties and later over most of the State. Face fly was particularly troublesome in Bayfield and Ashland Counties, reportedly causing blindness in some cattle. Reports of activity in Wisconsin were received until late September. The first specimens of the season in ILLINOIS were observed on cattle in Mercer County May 5. Populations were rather low through June and July, usually varying 0-7 per face. The heaviest populations of the season were observed August 3-6 when numbers in the northern half of Illinois were 0-67 (average ) per face with many flies clustered on the backs and sides of the animals in the most heavily infested herds. Overwintering populations in INDIANA gave indications of high summer numbers during 1964 but these highs did not materialize and face fly numbers remained very low until early September when they reached highs of 30-35 per head. Face fly remainded at this level for only 2 weeks then dwindled rapidly. High summer face fly populations occurred only in the eastern half of Indiana, primarily from Highway 40 northward. Up to 25 or more adults per animal were observed May 3 on backs of dairy animals in Shiawassee bounty, MICHIGAN. The exudate caused by Hypoderma spp. (cattle grubs) served as an attractant. Face fly was relatively low in Michigan on beef and dairy animals during the summer. Face fly infestations ranged 0-50 per animal with an estimated average of 20 per animal in GEORGIA. This fly has been found in several additional counties; the known outer limits of counties infested in Georgia are Polk and Stephens. Face fly was the only new livestock pest entering ALABAMA for the first time in 1964. It was located in several herds in Cherokee County along the Alabama- Georgia State line. Sufficient surveys have no
Size: 1990px × 1256px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
