Finman,
If you have 30 mites after winter, you have a heavy load in late Summer.
If you think my colonies have your projected loading by late summer you are sadly mistaken. You are either deaf, or fail to read or understand that I do not go from Thymol treatment in September until the following September without any action against varroa. HEAR THAT? GOT IT?
My colonies likely have more than thirty mites in the spring but I do not allow my colonies to get to those projected loadings, by taking any appropriate opportunity as it arises, or is needed, to reduce mite numbers. GOT IT? Perhaps you might consider retracting this comment?
You are totally wriong. But it is your choice to be wrong and nothing will change it. (=stupid)
Perhaps it applies to yourself much better?
Similarly, silly comments, like the following, make me wonder what you are on! Perhaps you might put the bottle away for a while?
Oliver, take you pills. You make knowledge from nothing.
last year I lost 30% of my hives because Oxalic acid treatment is not enough...
It seems to me that you should not be so reliant on the one treatment or that you should monitor your colonies a little better than it appears from your HORRENDOUS colony losses.
Perhaps if you follow the following instructions, you would improve your beekeeping skills. Here they are... oh, on second thoughts you probably could not understand other IPM operations, or would think they were not any good as the first italics is emminently fitting in your case...so little point in giving them.
Have a nice day. My winter losses are running at around 5% this winter, less over the five year average. Your 30% is HORRENDOUS!!