Sheep, Helminths, Anthelmintics, Drug resistance, Surveys, Western Australia
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The Department of Agriculture launched the CRACK approach to worm control in September 1985 in response to finding that anthelmintic (drench) resistant worms were present on 68 per cent of a random selection of Western Australian sheep farms.
The high cost of internal parasites in terms of lost production and drench costs, together with the high prevalence of resistant worms of farms, confirmed that changes were needed to existing parasite control measures in sheep.l
Edwards, J R.; Chapman, Helen; and Dunsmore, Jon
"Evaluation of the CRACK approach for the control of drench resistance in sheep worms,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 30
, Article 10.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol30/iss3/10