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Date: | Thu, 7 Mar 2002 15:14:43 -0700 |
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Further to all this, I came cross some old data to show why I am not as
worried about tracheal or sampling more bees as some think I should be.
Here are results from Fall 1997, a year in which I sampled but never
treated:
Yard Positive Negative Total Tested Infestation level
Railway 3 47 50 High
Jahns 2 48 50 Medium
Meglis 10 40 50 Medium & Low
Falks 6 44 50 Medium
Kievers 1 49 50 Low
Dixons 4 46 50 Low
There are 6 more yards, but the above are actually some of the worst, and 4
of the next 6 were zeros. The other two were a ten and a one. I'm too lazy
to type them in.
The point is that I was unable to see any visible differences between yards,
or losses that I could attribute to the higher tracheal levels in some
yards. We have varroa now, and did not then. I understand the effects are
somewhat additive, so am lowering my threshold of concern a bit.
Nonetheless, the current results are so much better than these that I am not
too worried.
allen
http://www.internode.net/honeybee/diary/
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