Anthelmintic resistance is a growing problem on sheep farms here in Ireland and actions need to be taken at farm level to slow this down.

Tom Coll of Teagasc said during a webinar that over the years, resistance has been detected, particularly in the white, yellow and clear drenches - with the two prescription-only products also witnessing worrying trends with regards to resistance and its effectiveness.

Anthelmintic resistance is the genetic ability of a worm to survive a dose of anthelmintics that should kill it and it is a big concern for the sheep sector here in Ireland.

Tom added that if the drench is killing 95% of the worms, then generally lamb performance is not affected; however, if it drops below 95%, then lamb performance will suffer.

There are a number of wormer products available on the market for farmers to choose from - which can be seen below.

These include: