No evidence to support the use of glycerol–oxalic acid mixtures delivered via paper towel

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this seams to be a bit of a weird study. maybe you science guys can help me out here.
their graph seams to show the oxalic acid working but claim "no statically evidence". can someone explain the math on that?

however this whole study is weird.
first of all its shop towels not paper towels (blue shop towels are synthetic).
but the big ones is that they are using shop towels which even randy oliver went away from some ~5 years ago (now its swedish sponge, maximizer pads, even cardboard strips). ie they are testing something thats known to work poorly.
also only testing at low acid rates (the highest they tested was 18g), similar to the early testing many years ago now. these days its around 50g.
the whole study is on a method that was only a step in the evolution quite some time ago.

if anything this study reinforces not using out of date methods that have long since replaced with better ones.


Founder Member
Semi Commercial
Scientists looking for grant money. Come up with an idea for a study that someone is willing to sponsor. The decline of the honeybees is pretty buzzwordy, so someone puts up the money. Waste of time, but they get paid for another year.
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Reactions: tristan
Hawkes Bay
I have been wanting to do some experiments with oxalic fogging for a while so I deliberately left some lives at home under treated. I may have got a bit carried away with the under treatment as when I finally got around to making my testing gear three of the four was showing signs of PMS. I had intended to monitor the natural drop for a couple of weeks but they would have died if I had left them (they still may). Two hives were weak to start with and are only two frames of bees but had a natural Average drop over three days All of 26 and 7 followed by 170 and 105 the day after the first treatment and the two that were one box of bees were 1 and 50 followed by 27 and 310 . All hives still have brood. Frankly I'm amazed that three of them are still alive. It's my fault I just got busy with other projects. At least I now know for sure that six random fogs over the autumn is not sufficient. The only good thing to come out of it so far is that the hives with the least mites is the one I used for breeding in the autumn.
I intend this to be an ongoing project and I may have to bring home some new hives in the spring. The main thing I'm trying to find out is how many days do the mites keep dying after a fog . There is too much conflicting information out there and like Alistair says it can be very difficult to treat to a regular program. I have seen suggestions for everything from only immediate knockdown to 5 or six days with the highest mortality being on the fourth day.
Please note some of those higher numbers might be out by the odd Mite or two.
There is too much conflicting information out there
there is some good information out there.
oxalic only lasts about 4 days in the hive, so you really need to vaporize every 4 days or so until you at least get one whole brood cycle, preferable two.
if the hive is broodless it becomes a whole lot easier, once or twice is enough. i know some who have been trailing caging the queens to force a brood break.