Hello All, Leave it to Bob to nit pick research. My problem is not with the hypothesis but with the data collection. First let me say a test to see the efficacy of Apistan on the subject bees would help give the research better creditability. Apistan or fluvalinate resistance is common in most areas of the world including GB. Next on pg. 4 under results September 2005 the period is only 30 days. Apistan needs 42 days or two complete brood cycles. In other words what would be the number of mites in both groups if left the label recommended period? The last 12 days might change the results? Next under (I) "by examining the individual cells". The research lists LC & SC counts but only lists drone brood. Which drone brood? SC or LC? AND only 87 cells looked at. Actually the amount of varroa in LC & SC is statistically so close of little importance. Large worker 614 cells/ 27mites Small worker 718 cells/21 mites 6 mites difference is not a lot. Also hives being hit so often with a working fluvalinate are not a good test of SC & LC. Please correct me list if my figures are off as I only read through the information once. Back to work! bob -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ****************************************************** * Full guidelines for BEE-L posting are at: * * http://www.honeybeeworld.com/bee-l/guidelines.htm * ******************************************************