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Date: | Thu, 23 Nov 2017 14:17:37 -0800 |
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>
> >Wouldn't longer winters, more consistent cold without cleansing flights
> account for much greater spore accumulation the individual bee and colony.
>
Spores in the hindgut do not appear to harm the bee, since they don't
germinate there. The problem comes if a bee with dysentery defecates those
spores within the hive. It is easy to observe that other bees will rapidly
ingest that defecate, and thus infect themselves.
>
> >A study that shows lack of increased survival or improved heath seems to
> be
> the clincher that treatment has no value.
>
There's a pretty good body of evidence that in northern climes (at least
where nosema is a problem), treatment with fumagillin can improve colony
health and productivity, both for *apis* and *cerana.* Please do not take
this as a pitch for fumagillin--I'm simply stating that there is evidence.
--
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com
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