Drench restistant worms can cost sheep farmers a lot of money - more than most probably think. Brown Besier, Jill Lyon and Norm McQade discuss some new research that shows the value of conducting routine drench tests to ensure effective worm control.
Besier, Brown; Lyon, Jill; and McQuade, Norm
"Drench resistence : a large economic cost,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 37
, Article 6.
Available at: http://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol37/iss2/6