Toxicity of SD 8447 and Dichlorvos to Larvae of the Horn Fly, Haematobia Irritans, (Diptera: Muscidae) in Manure of Insecticide-Fed Cattle

Authors

  • J. F. Butler
  • N. I. Greer

Abstract

SD 8447 (2-chloro-1-(2, 4, 5-trichlorophenyl) vinyl dimethyl phosphate) used as a feed additive for cattle caused significant (p < .01) mortality of horn fly, Haematobia irritans (Linnaeus), larvae in manure samples from cattle. At levels of 0.1, 0.15, and 0.20 mg/kg/day, the percent mortality was respectively 63, 85, and 97.6. Similarly dichlorvos pellets (Atgard) fed at 2.25 mg/kg/day produced 98.3% mortality, while 7.2 mg added to 100g manure from untreated animals resulted in 99% mortality (p < .01) of horn fly larvae.

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Published

1973-06-01

Issue

Vol. 56, No. 2 (June 1973)

Section

Literature Review Articles

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