Studies on the development of the free-living stages of cooperia curticei

Abstract

Extract

Apart from observations on the hatching of eggs at different temperatures (Crofton, 1965) and the rate, of larval development at “room temperature” (Andrews, 1939), the biology of the free-living stages of Cooperia curticei has not been studied. This lack of attention is probably due to the low pathogenicity of C. curticei for sheep (Andrews, 1938; Ahluwalia and Charleston, unpublished data) and the smallinfestations that are usually reported (Crofton, 1963). In New Zealand, however, heavy infestations of C. curticei commonly occur in sheep.