I have seen this and photographed it in only one of 400 hives I was running . It was a few years after varroa mite hit, and yes it was a crossbreed. You could see the different coloured bees, some dark, some yellow . I thought it was hygenic bees and marked the hive but when I went back a month later all the brood was normal.
Just have to try and find the pictures. I have them on a Power point.
Frank Lindsay
NZ
________________________________________
From: Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]> on behalf of Carolyn Ehle <[log in to unmask]>
Sent: Thursday, 26 May 2016 6:23:19 a.m.
To: [log in to unmask]
Subject: Re: [BEE-L] Mystery Brood Anomaly
Strictly anecdotal, but some time ago, 10-15 years? I had an observation
hive that built against the glass so that I could watch the development
within several dozen cells. The stock was a Russian hybrid queen, at
least second generation here among my motley multi-sourced survivor
stock. I saw a number of worker and drone cells with varroa mites
inside. Some became trapped in cocoon silk,in others you could watch
the nurse bees reaching in trying to grab the varroa, sometimes
successfully. In about 8 cells after capping I could still see a varroa
mite. All of these were later partly uncapped and the nurse bees kept
trying to grab the varroa. Some were recapped, some left partly open,
all hatched normal looking workers. I discussed it with Jamie Ellis and
Jennifer Berry, along with some allo-grooming behavior that ignored
varroa and focused on the wing base spiracles. They both postulated
that these were types of hygienic behavior, the brood uncapping for
Varroa, the allo-grooming for tracheal mites that enter the wing base
spiracle. I believe they have both gone on to study the phenomena, but
due to health reasons I have not kept up on the literature though I
still keep about 10 hives of my motley survivors.
I'll be interested to see what others have seen....
On 5/24/2016 4:42 AM, Steve Rose wrote:
> On 5/23/2016 9:20 PM, John Caldeira wrote:
>> Hello Bee-L,
>> A local beekeeper presented photos of unusual looking sealed brood
>> that I'd never seen before. It looks somewhat like an extreme case
>> of 'bald brood' caused by wax moth, but the beekeeper tells me the
>> colony is strong and he has seen no sign of wax moth. ...
>
> Those are fascinating pictures and I am hoping someone can explain the
> phenomenon... Could the bees be sensing a problem with the pupae,
> such as AFB, then removing the worst and leaving others open so they
> can be monitored?
>
> ***********************************************
--
Carolyn Ehle in South Carolina
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