Bob Harrison mentioned:

Both OA & formic could be causing the M. tubules problems I have been 
told.
The industry has shifted to those products. I am NOT saying those products
are the source on the M. tubules problems but only sharing what I have 
been
told.
Something is damaging the malpighian tubules ( bees kidneys). Damaged M.
tubules was found in most CCD bee samples.

Bob:

I will be interested to get a copy of any published information to show 
oxalic acid and formic acid damaging the Malpighian tubules. Does this 
information indicate beekeepers who used oxalic acid and formic acid have 
bees suffered from CCD? I know beekeepers who have high losses in the USA 
and they say that is "CCD". These beekeepers have never used formic acid 
or oxalic acid.

It would be nice to back some of these statements with some preliminary 
research results. 

Medhat


Medhat Nasr, Ph. D.
Provincial Apiculturist
Crop Diversification Centre North


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