Using Formic & Oxalic |
Subject: Re: Oxalic Acid Evaporation
Reply-To: Informed Discussion of Beekeeping Issues and Bee Biology
Date: Fri, 12 Mar 2010 08:48:33 -0700
> This will be a very useful URL:
> From the Swiss institute for bee research in Liebefeld.
Thanks for that. It seems to confirm that the risks are minimal.
Here is an excerpt from a URL on that page. The entire article
is worth reading.
Evaporation of oxalic acid - a safe method for the user?
T. Gumpp, K.Drysch, M. Radjaipour, P. C. Dartsch (2003)
Last modification: 02.02.2006 | Size: 330 kb | Type: PDF
Result: All measurements clearly underneath exposure-limit
Evaluation of data led to a clear result: None of the 20
beekeepers reached even half the exposure-limit of 1.0 mg/rn3. (tab.
average value of the 10 measurements on evaporation procedure was
mg/rn3, the average value of the 10 measurements on spraying
0.22 mg/rn3. There was no significant difference between both
To better comprehend these results we must briefly concern ourselves
the definition of the exposure- limit (MAK-Wert): The exposure-limit
such a way selected that for an employee no health damage is to be
if he stays 8 hours a day during a working life time at working
which the alr concentration of the respective hazardous substance
exceed the exposure-limit .
Thus, based upon the presented data, a commercial apiarist could use
acid treatments during the whole year 40 hours a week without
Meaning of the results to apiarist's practice With evaporation- and
spraying-procedure of oxalic acid, beekeepers have possibilities of
treatment against varroatosis whose effectiveness and bee
already convincingly been proven . However, there were concerns
particular the evaporation procedure was injurious to user's health.
Overcautious scientists therefore warned about evaporating oxalic
recommended preventive measures which made the procedure
wearing ABC protection equipment. The presented study dispelled
against both procedures concerning possible health risks,