Health Canada’s Pest Management Regulatory Agency (PMRA), has granted conditional registration for the sale and use of Amitraz Technical and Apivar Strips, containing the technical grade active ingredient amitraz, to control the parasitic mite (Varroa destructor) on honey bees.
http://www.hc-sc.gc.ca/cps-spc/pubs/pest/_decisions/erc2013-04/index-eng.php