Economics of Controlling Horn Flies (Diptera: Muscidae) in Range Cattle Management

摘要: Yearling stocker calves and mother cows were treated with either stirofos (Rabon®) or fenvalerate (Ectrin®) ear tags to control Haematobia irritans (L.) at Woodward EI Reno, Okla., in 1979, 1980, 1982. Stirofos 1979 failed provide acceptable resulted only a 2.8% gain weight. Fenvalerate (two per head) used 1980 1982 Woodward, excellent horn fly weight from 11 14.3%. In 1981, El fenvalerate-treated outweighed untreated by 7.4 kg head weaning. These increases returns ranging $2.16 $8.38 $1.00 spent on insecticides for control. differences obtained when animals essentially free of H. had as many 700 flies each.