Toxicity of Crotoxyphos Insecticide to Brahman Calves and Brahman and Crossbred Yearling Steers

Authors

  • N. I. Greer
  • M. J. Janes
  • D. W. Beardsley

Abstract

Crotoxyphos (Ciodrin) insecticide was applied to Brahman calves and Brahman and crossbred (Hereford-Angus) steers to determine its effect on blood cholinesterase. Brahman calves treated with 946 ml of 1% crotoxyphos spray showed inhibition in whole blood and red cell cholinesterase (p < .01). Two out of 4 calves exhibited severe toxicosis and 1 developed skin lesions. Brahman calves treated with 946 ml of 0.5% crotoxyphos spray or 3% crotoxyphos dust showed cholinesterase inhibition (p @? .01) but no observed toxicosis. Whole blood and red cell cholinesterase of Brahman and crossbred steers were inhibited (p @? .01) when treated with 1.9 1 of 0.5% crotoxyphos spray per head at weekly intervals for 11 weeks. Brahman animals had a greater (p .01) inhibition than crossbred steers. The 3% crotoxyphos dust offered as free-choice in a self-applicating dust bag produced no cholinesterase inhibition in Brahman and crossbred steers; 2.7 kg of dust were depleted from the dust bag during the 11-week period.

Downloads

Published

1973-09-01

Issue

Vol. 56, No. 3 (September 1973)

Section

Literature Review Articles

License

Copyright for any article published in Florida Entomologist is held by the author(s) of the article. Florida Entomologist is an open access journal. Florida Entomologist follows terms of the Creative Commons, Attribution Non-Commercial License (cc by-nc). By submitting and publishing articles in Florida Entomologist, authors grant the FOJ and Florida Entomologist's host institutions permission to make the article available through Internet posting and electronic dissemination, and to otherwise archive the information contained both electronically and in a hard printed version. When used, information and images obtained from articles must be referenced and cited appropriately. Articles may be reproduced for personal, educational, or archival purposes, or any non-commercial use. Permission should be sought from the author(s) for multiple, non-commercial reproduction. Written permission from the author(s) is required for any commercial reproduction.