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The ecology of the free-living stages of Ostertagia circumcincta

Published online by Cambridge University Press:  06 April 2009

T. E. Gibson  and
G. Everett
T. E. Gibson
Affiliation:
Central Veterinary Laboratory, Weybridge, Surrey
G. Everett
Affiliation:
Central Veterinary Laboratory, Weybridge, Surrey
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Extract

The development and survival of the eggs and larvae of O. circumcincta was studied by spreading the daily faecal output of a sheep over a 2 m square grass plot for 1 week. Observations were carried out for 3 years on material spread at 4-weekly intervals and broadly similar results were obtained in each year. Development time was long in eggs placed outside in January, February, March, November and December. Yields of larvae were small and all were dead within 5 months. During the rest of the year development time was about 2 weeks, yields of larvae were high and larvae survived until July or August of the following year. The significance of these findings in devising systems of grazing management to control parasitic gastroenteritis is discussed.

Type
Research Article
Information
Parasitology , Volume 64 , Issue 3 , June 1972 , pp. 451 - 460
Copyright
Copyright © Cambridge University Press 1972

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References

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