I would visit this page, it gives a comprehensive overview http://www.omafra.gov.on.ca/english/food/inspection/bees/varroa-sampling.htm PLB *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html