The Nematodirus disease risk in lambs this spring is forecast to be low, although cold or dry April conditions could increase the risk to main crop lambs by allowing a later hatch of the parasite eggs on the pasture. Incidence is generally high when spring is late, as the hatch of larvae is delayed until main crop lambs are consuming significant amounts of grass. It has also been suggested than in years with an early spring, it may rapidly become too warm for hatching to continue, leading to a low incidence of disease.
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