I had never use OA(V) because It can cause kidney and liver problems. That
is what I was told by a beekeeper that did a technical trip to Denmark and
Italy some 4 years ago. I also understood that the oxalic cristal are
available for a couple of hive inspections, therefore one should use the
mask for quite a while after application.

Too high the risk in my opinion. Too unconfortable also. It is enough to
stand the veil (i am a heavy smoker) to think on using a gas mask.


-- 
Juanse Barros J.
APIZUR S.A.
Carrera 695
Gorbea - CHILE
+56-45-271693
08-3613310
http://apiaraucania.blogspot.com/
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