>  Mike, do you mean that OA(v) doesn't work as a varroa control?


Not in my operation. I vaporized in November two years in a row. 
Found increasing numbers of varroa. So third year, on directions of 
Heilyser, vaporized 3 times a week apart...in November, and again in November.

I found no difference in mite population by alcohol wash...before and 
after the treatments.

I know that OA(v) must be done when colonies are broodless. My bees 
are mostly broodless in November. Why didn't it work for me?

Either the colonies weren't broodless...I believe they were or nearly 
so for all November treatments. The temperatures were too cold and 
the clusters too tight for the vapors to penetrate the 
clusters...this is first on my list of possibilities. Or...the vapor 
doesn't work.

I wonder if the vaporizer that Madhat built works better...it uses 
air to force the vapors into the cluster.
Mike 

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