Oxalic acid Powerpoint presentation
Updated 15 January 2016 Updated oxalic acid ppt presentation
Since the EPA registered oxalic acid for the use in beehives (as far as I know, Brushy Mountain has the only registered product to date), I’ve been flooded with questions about using it (since I’ve used it steadily in my operation for over a decade).
Therefore, I’m making a Powerpoint presentation on using oxalic acid available. You may use this presentation at your local bee club meetings. Most of the slides are self explanatory, plus I’ve added notes to those needing more explanation. The presentation consists of 84 slides:
If you use this presentation, I’d appreciate a donation to ScientificBeekeeping.com to help offset my time in preparation.
The Powerpoint presentation can be downloaded at: 2016 Oxalic acid
For those without Powerpoint, a pdf version is at: http://scientificbeekeeping.com/2016-oxalic-acid-pdf/ Unfortunately, this version does not come with the notes for the slides that can be viewed in Powerpoint.
Update 29 Dec 2015: An email from a recreational beekeeper:
“Hey Randy, first let me thank you for all your good work and your ability to transfer information and making it palatable to newbies such it myself. Just want to drop you a quick line about Oxalic acid. This is not scientific–just a practical application advice. I’ve been using it for about a year and a half. Started out with the dribble method and had excellent results. My mite count is practically nil. I recently purchased the vaporizer and would like to make a couple of quick non-scientific observations. First being a backyard beekeeper I have to pull the battery out of my car and drag it out to the backyard hive locations. Treat my five hives and then return the battery to my vehicle and hope that it still has a charge to start my car up. No little task for an auto neophyte. Next if you’re using the vaporizer you can kiss your screen bottom board goodbye. It will most likely eat right through the screen and the heavy Styrofoam type removable bottom used in most commercial screen bottom boards. Next if you’re using plastic frames there an excellent chance that the intense heat will melt them. At least any in the immediate location of the heating element. Last but not least as you mentioned in your articles the fumes of the acid is intense and dangerous but with the added odor of any Bees that may have been cooked in the heating element the smell is pretty bad. Just my two cents of a couple of problems which I don’t ever recall being mentioned or spoken about.”
There are pros and cons to every treatment method, and the decision to dribble or sublimate OA is no exception. I’ve listed the pros and cons in the ppt presentation.
6 Jan update:
A team at the University of Sussex published an excellent paper (not yet published) comparing three methods of oxalic application: spraying each frame of bees individually, dribbling the “seams” of bees, or sublimation with a Varrox M3080 vaporizer. They tested the three methods at different doses of oxalic acid.
A brief take-home on their findings:
Spraying was effective, but tough on the bees, invasive, and time consuming, so I will discuss it no further.
Dribbling and sublimation were fairly comparable, with some notable differences.