3 July 1998

Stick to worm dose guides

Stick to worm dose guides

Stick to worm dose guides

CURRENT weather is increasing worm risk, and sheep producers are advised to ensure they stick to dosing guidelines.

Chris Lewis of Shrewsburys vet investigation centre warns that even where producers have opted to worm every three weeks, worm larvae can do real damage.

"Where lambs have dirty tails even where there are no worms, it could be a reaction from larvae. The larvae cause a reaction in the digestive tract, which leads to protein being lost. This explains why lambs can fail to grow even where regular worming is carried out."

He says that the only way to avoid larval concerns is to worm lambs onto clean pasture or aftermath.

, or land which has not been grazed since Christmas, which is likely to have a low level of infection.