Hello Chuck & All, Most *natural* products have in fact been tested by the USDA in the U.S. and found to not be very effective. Many which were promoted on the internet were not effective at all. I would check with the Beltsville bee lab to see if your product has already been tested. If you have found a product which is giving varroa control then the bee labs can tell you how to run experiments with controls. Without documentation to back up your claims your *natural* control will fall on deaf ears. In order for most of us to get on board we need to see results from a Bee Labs tests with controls. Many beekeepers lost hives trying *natural* methods. I have a open mind and don't want in any way to discourage you. In fact I would encourage you but beekeepers are wary of unproven methods based only on word of mouth. Sincerely, Bob Harrison Odessa,Missouri I am writing up a research proposal for a new varroa treatment. It would use a natural product. I need information on what products are registered in different countries. I'd appreciate any information on what products are registered, what the active ingredient is and what the relative price is. Also how many colonies are in the country? Are they all treated? How much treatment is there with "official" products vs. others? > I would be thankful for any information.