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Face-fly pest intensity, fly-avoidance behavior (bunching) and grazing time in Holstein heifers

By E. T. Schmidtmann, M. E. Valla

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In field studies in New York State in 1978-79, the relationship between feeding by adults of Musca autumnalis Deg., and fly-avoidance behaviour (bunching) and grazing time of heifers was examined in herds that were either exposed to the ambient pest intensity levels or treated with permethrin sprays to suppress fly feeding. The number and duration of bunching episodes was greater in herds exposed to ambient pest activity; also, there were positive correlations between pest intensity and the number and duration of bunching episodes. Heifers with faces protected by bunching were exposed to significantly fewer flies than they were prior to bunching or heifers on the periphery of the aggregation. Total grazing time did not differ between herds, and there was little difference in diel grazing patterns, which indicated that bunching represented modified non-grazing behaviour rather than displaced grazing time.

Date 1982
Publication Title Applied Animal Ethology
Volume 8
Issue 5
Pages 429-438
Language English
Author Address Department of Entomology, New York State College of Agriculture and Life Sciences, Cornell University, Ithaca, USA.
Cite this work

Researchers should cite this work as follows:

  1. Animal behavior
  2. Arthropods
  3. Avoidance
  4. Cattle
  5. Chemicals
  6. Collection
  7. Control
  8. Developed countries
  9. Distribution
  10. Feeding behavior
  11. Flies
  12. Group behavior
  13. Hosts
  14. Insecticides
  15. Insects
  16. Invertebrates
  17. Mammals
  18. New York
  19. North America
  20. OECD countries
  21. Parasites
  22. peer-reviewed
  23. pest control
  24. Pesticides and Drugs
  25. United States of America
  1. peer-reviewed