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Tue, 15 Apr 2008 15:31:37 -0400 |
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PB Wrote
<snip>
It is very difficult to pin down cause and effect in such cases as these.
Almost everyone thinks the honey bee population is "immune compromised" on
the whole. Just what caused that is in dispute, but even so, given a
weakened immunity the bees could be much more susceptible to just about any
pathogen. But then, the final knockout is not the "cause" but the agent of
final demise.
<end snip>
OK then, what was the agent of final demise in these "wave across yard"
losses? The wave effect suggests something that travels from one hive to
the next. To be discernable as a wave it is unlikely to a wind born, which
to my mind leaves bees drifting. Whatever the vector of their demise if it
is carried by drifters it should be detectable, either parasite or
disease? All the colonies will share the symptoms of the final agent, even
if losses elsewhere, that are attributed to CCD, do not share those
symptoms!
How big are the holding apiaries where these 'waves' have been noticed and
over what time scale does the wave advance?
Peter
Cambridge UK
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