who worked with the same Acacia at concentrations in vitro of 0.04–1.25 mg/ml, found an inhibitory effect on the feeding of stage 1 larvae of H. contortus, Trichostrongylus vitrinus and Teladorsagia circumcincta with DL50 0.043, 0.038 and 0.050 mg of Acacia/ml, respectively.