Many thanks, I won't add the lemon juice. Someone suggested adding a little Honey B Healthy, I might try that. Thanks, again.I've never used fumagillin, but I do have an understanding of how stable a substance will be under a variety of conditions. It looks like fumagillin would be pretty sensitive (would be partially broken down) at low pH values, like you'd get when adding lemon juice. But, without experience I cannot say for sure.
As MB said, the way to confirm nosema would be to do a spore count.
since tony was aware of the following Main beek using it, he could very well recommend it.The Maine state inspector (Tony J) recommended thymol to treat active cases of nosema?