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Subject:	Re: Varroa on adult drones and oxalic strips
From:	randy oliver <[log in to unmask]>
Reply To:	Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:	Fri, 15 Jul 2016 07:53:12 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (27 lines)

>Why do many use drone brood removal a part of their IPM program if there
are only a few mites in the green drone sized frames.

Sometimes there are plenty of mites in drone brood.  That's why I suggest
actually checking with a cappings fork prior to removing the drone brood.
If you see mites, then remove the drone brood.

>
> I mean, if a colony have between 10% to 20% adult drone population and
> assuming an even distribution of foretic varroa between drones and workers,
> varroa load over worker should increase when drones are expelled from the
> hives at summer end, should it?


There is not an even distribution--varroa preferentially ride on nurse
bees.  Also, if a drone is expelled, so are its mites.

-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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