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To: "Informed Discussion of Beekeeping Issues and Bee Biology" <[log in to unmask]>
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Subject: Vs:      [BEE-L] Apistan after 4 years
Date: Sun, 14 Aug 2005 10:01:30 +0300

Italians  ( Milani if I recall right)  showed last year  results from a study about  apistan use in hives taht had had resistant mites. I don't have the paper but recall that thre was better effect afrer about 4- 5 years of no Apistan. But the effect was in 70 % range instead of the 97 % that is normal for non-resistant mites. 

This means that it takes longer to have a normal effect back. Tim if you use Apistan now, be sure not to use it again next year as the resistance starts to come back fast if 30 % of bees are still resistant. 

Ari

Finland

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