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Informed Discussion of Beekeeping Issues and Bee Biology

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Date:
Mon, 21 Nov 2011 14:04:10 +0100
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Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
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Subject:
Re: Dropping Varroa
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From:
Ghislain De Roeck <[log in to unmask]>
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> Has anyone here any data on the effects on wintering or spring performance
of colonies repeatedly dosed with OA vapour?

Two rules here, Allen:
- only one application of oxalic acid in a bee's lifetime
- no application when brood in the hive

In Italy, where OA-application against varroa started, beekeepers used OA
repeatedly and at a higher concentration as 3,5%, but they came back from
it!

Ghislain De Roeck,
Belgium/Europe.


 

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