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Subject:	Re: Fall mite drop
From:	"J. Waggle" <[log in to unmask]>
Reply To:	Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:	Tue, 22 Sep 2009 14:25:13 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (31 lines)

--- On Tue, 9/22/09, Bill T <[log in to unmask]> wrote:

> As far as I know (be happy to be corrected), usually, when
> DWV is
> spotted it indicates Varroa. I realize there are times that
> Tracheal
> is the culprit, but it is still an excellent indicator of
> Varroa. I
> think we are nit picking.

I suppose by saying "when it is spotted" you are referring to the visual symptoms of deformed wings caused by DWV as being an indicator of varroa.

From what is referenced in this link:

http://vir.sgmjournals.org/cgi/content/abstract/86/12/3419

...The visual symptom of deformed wings does not appear in all cases of DWV, because it can exist in an  'inapparent infection'.  The symptoms as a rule may not, and do not occur in all varroa infestations.  So IMO, it would not be reliable indicator of the presence of varroa.

Joe

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