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Analysis of 20 Drench Resistance Tests on 19 beef cattle farms in the Agricultural Regions of WA

A series of drench resistance tests in cattle using the macrocyclic lactones, benzimidazole and levamisole groups in southern WA are reported here. The tests have identified:  

  • Resistance in Cooperia oncophora to ivermectin on 63% of farms tested.

  • Resistance in Ostertagia ostertagii to benzimdizole and levamisole on 50% and 63% respectively of farms tested. 

  • Resistance in Cooperia oncophora to ivermectin using pour on application at Day 14 and Day 28 on 50% and 37.5% of farms respectively. 

  • Resistance in Ostertagia ostertagii to ivermectin pour on at Day 14 and Day 28 on 20% and 37.5 % of farms.

Downloads

Title Size Date published
496.8KB 21/12/2011

Contracts

Contract No. Title Start date End date Funding type
P.PSH.0444
A re-evaluation of worm control and anthelmintic resistance on beef cattle properties in Western Australia
01/11/2008 16/12/2011
MDC PSH

This page was last updated on 05/07/2018

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