CATTLE PRODUCERS CAN NO LONGER RELY ON COMMONLY USED DRENCHES Cattle worms have learnt to outsmart most drenches. An article published in the Australian Cattle Veterinarian’s journal summarised the results of 25 trials, including over 1,100 animals.1 The table below summarises relevant data from the 25 trials for key worm species. BRAND NAME NO. OF TESTS EFFICACY % BARBER’S POLE EFFICACY % COOPERIA EFFICACY % OSTERTAGIA Cydectin® Plantinum 25 99.4 99.3 100 Cydectin® Pour-on 10 75.0 69.3 99.0 Dectomax® Pour-on 8 28.9 71.9 NA Ivomec® Pour-on 3 0.0 87.3 NA Abamectin Pour-on 2 51.0 86.0 97.0 Levamisole Pour-on 6 99.7 99.7 73.0 N/A – inadequate worm numbers or larval differentiation is not possible for this species. KEY FINDINGS: Most drenches are no longer reliably effective in killing all key worms Commonly used single active drenches had a mean efficacy of only 72% Combination drenches are the new standard in cattle to ensure control of all key worm species >95% CATTLE PRODUCERS MUST CONSIDER MOVING FROM SINGLE ACTIVE DRENCHES TO COMBINATION DRENCHES LIKE CYDECTIN PLATINUM
