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Related Experiment Videos

Thermal requirements for Hypoderma lineatum (Diptera:Oestridae) egg development

J H Pruett1, S E Kunz

  • 1Knipling-Bushland U.S. Livestock Insect Research Laboratory, USDA-ARS, Kerrville, TX 78028, USA.

Journal of Medical Entomology
|November 1, 1996
PubMed
Summary
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Lowering temperatures prolong cattle grub egg development, with no hatching below 20°C. Cattle skin temperatures provide a suitable environment for Hypoderma lineatum egg survival and hatching.

Area of Science:

  • Veterinary Entomology
  • Parasitology
  • Insect Physiology

Background:

  • The common cattle grub, Hypoderma lineatum, is an economically significant ectoparasite of cattle.
  • Understanding the thermal requirements for Hypoderma lineatum egg development is crucial for predicting parasite distribution and developing control strategies.

Purpose of the Study:

  • To determine the lower thermal developmental limits for Hypoderma lineatum eggs.
  • To assess the suitability of cattle skin temperature for successful egg incubation.

Main Methods:

  • Eggs of Hypoderma lineatum were incubated at various constant temperatures to observe hatch rates.
  • Cattle skin temperatures and ovipositional behavior of gravid female flies were monitored.
  • Laboratory infestations were conducted in unheated barns during winter in central Texas.

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Main Results:

  • Embryonic development time for Hypoderma lineatum eggs increased as incubation temperature decreased.
  • No egg hatching occurred at a constant temperature of 20°C.
  • Eggs oviposited on cattle in an unheated barn hatched within one week, indicating a suitable thermal environment.

Conclusions:

  • The lower thermal limit for Hypoderma lineatum egg development is above 20°C.
  • Cattle skin temperature offers a favorable thermal environment for Hypoderma lineatum egg viability.
  • Laboratory cattle infestations can be successfully achieved in unheated barns during winter in central Texas.