Biological control of Haemonchus contortus in sheep by nematophagousfungus, Duddingtonia flagrans

摘要

A controlled experiment was conducted in sheep artificially infected with Haemonchus contortus, a group of which was drenched with chlamydospores of Duddingtonia flagrans of Indian sheep origin at 0.5 million spores/kg body weight twice daily for 30 days to understand whether the chlamydospores can survive gut passage and can reduce the number of infective larvae of H. contortus on pasture and in faeces. Daily feeding with the microfungus led to lowered herbage infectivity. Recovery of infective third stage larvae was also considerably reduced in in vitro faecal cultures.