worming© Tim Scrivener
Using multi-active wormers in lambs to kill as many resistant worms as possible has been shown to slow or reverse wormer resistance, according to recent trial results.  Researcher Dave Leathwick, principal scientist at Agresearch, New Zealand, found when a multi-active wormer containing ivermectin and levamisole was used on lambs in a three-year field trial, it slowed the development of resistance, with the best response shown in groups that also had 10% of animals left untreated. See also: More advice on […]