The use of fine-particle phenothiazine against<i>Trichostrongylus colubriformis</i>in sheep with observations on its use against other species of worms

Abstract

Abstract Extract There has been an increasing amount of evidence in recent years that small-particle phenothiazine is more efficient than the usual commercial grades, particularly against Trichostrongylus spp., which are often inadequately controlled by the latter.