Author : Mohamed Abdul-Sada, Karrar
The changes in the hatchability & survival of Egg & Larvae of sheep nematode after exposure to Ultraviolet radiation
journal of kerbala university,
2008, Volume 4, Issue 2, Pages 260-264
The effect of ultraviolet (UV) radiation on the hatchability & the activity (survival) of sheep gastrointestinal nematode;Haemonchus contortus, trichostrongylus colubriformis , Oesophagostomum columbianum and Strongyloides papillosus eggs & Larvae were examined. The hatchability decreased with increasing exposure to radiation. The difference in hatchability of eggs irradiated for 15.30 & 60 minutes were highly significant (P< 0.01 dα = 3.08,3.25 and 3.76 respectively) compared with the hatchability of the non-irradiated eggs. The life span of irradiated was shortened , only (19%) of those expose to UV radiation 60 minutes survive for 2 days as against (100%) survival rate in the non-irradiated larvae . Batches of nematode larvae (L1) were irradiated with ultraviolet light for varying time interval to determine the influence of radiation on the transmission potential of the irradiated larvae. There was a decreased in the survival rate of the hatched free-swimming larvae that corresponded with the increasing radiation exposure time .