koland wrote in part:

"Was there more to the report (confirming these claims) that was not quoted
in the post?  There is no indication that the "mite drop" on either chemical
was dead or live mites (another reason to use a screened bottom board).
Nor, that the mite drop from the Apistan was not enough to control the mite
population   3,800 mites per day, after 42 days, even with decreasing
numbers each days, as the population decreases, should eliminate even a very
large population of mites."

Yes there was more information given by Dr Pettis at the meeting in Savannah that included the twist on apistan knocking down but not killing the mites.  The recent report from research by Mike Hood and Keith Delaplane also showed that using a screen bottom resulting in a considerable increase in effectivness of apistan in Georgia - but again not enough to fully control the mites.  Yes bottom screens can be a help in dealing with resistant varroa populations but they will only partly solve the problem.  

Sorry for the confusion guess that is what happens when you have heard the whole story but is may not have published yet in full details.  Another reason to attend meeting and listen to the researchers themselves.

blane





******************************************
Blane White
MN Dept of Agriculture
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