> Information in english on the German field trials can be found at:-
> http://www.mellifera.de/engl2.htm
> http://www.apis.admin.ch/english/host/pdf/alternativ/absOSRalph.pdf

I did some research.

Univar sells tech grade oxalic acid in 25kg quantities.  It is a stock item
and costs $4.18/kg (CAD) for tech grade, which has a stated minimum purity
of 99.6%

Chemfax has 1kg, 5kg, and 22.7 pails for $16.50, $62.10, $165.40.  Again,
it is tech grade.  Lab grade and reagent grade are also available, but at
much higher cost.

If the web site (above) is right and one treatment takes is 2.8g, then 25kg
would treat (25,000 / 2.8 = ) 8,929 colonies once for a total material cost
of $104.50 CAD or $66 US (plus labour).

The material cost amounts to about a cent per colony per treatment.

That's cheap!

allen
http://www.internode.net/honeybee/diary/