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Oxalic Acid Treatment Table


Table reworked and updated January 16, 2018.

You can download a printable pdf doc of the table at:

Oxalic acid treatment table 2018

 It is critical to mix and apply oxalic dribble correctly (5 mL between each frame of bees), or you risk seriously harming your bees!  Be sure to read:

http://scientificbeekeeping.com/oxalic-acid-questions-answers-and-more-questions-part-1-of-2-parts/

http://scientificbeekeeping.com/the-learning-curve-part-3-the-natural-miticides/

http://scientificbeekeeping.com/oxalic-dribble-tips/

http://scientificbeekeeping.com/oxalic-acid-powerpoint-presentation/

Update January 17, 2019: We’ve experimented with using 40% v:v glycerin in water instead of sugar syrup.  One possible advantage is that bees don’t like the taste of glycerin, and may thus be less likely to lick up the acid.  The glycerin also helps the OA to adhere to the bees’ bodies for a longer period of time.  This is still an experimental treatment, but we’ve used it on 1500 hives, and have been happy with the results.  This application method is not currently registered for use in the United States. Some formulas below (apologies for errors in previous updates).

*Distilled water may be necessary if you have “hard” (calcium-rich) water that reacts with the OA.  To test, heat up some of your tap water in a clear glass container, then stir in a tsp of OA.  If the water turns (and stays) cloudy white, there is too much calcium.

**Granulated sugar can be roughly measured by volume –1 pint weighs ~1 lb; 1 qt weighs ~2 lbs.

© Randy Oliver 2018

 


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