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My InstaVap sublimator spread the OA sublimation from a hole in the bottom board. The crystals become cooled and will be spread in between the frames. Some reports I have read shows sublimation of different quantities like 1,5g, 2,25g and 4g trials to show the different in effects. If 4g is not...

But sublimation of 2g OA is a very little blast, and as soon as it reach the frames from the bottom board, it is cooled down and the crystals have the same temperature as the hive environment. The bees are not heated up at all by the sublimation of OA. But the crystals stress the bees in the...

But imagine Norway in November, we treat the hives by dripping OA solution down to -5 degrees and open the hives without problems not loosing a single bee. Cold winters do not kill my Buckfast bees, and normally there are no snow by treatment. The bees get out of the cluster by dripping and...

I am a Norwegian beekeeper who is just about to start with evaporation of oxalic acid and ApiBioxal, both for testings. With us, the outside temperature has reached 0 to minus 3 degrees C. I close the hives completely to obtain the best effect. My question: Can you evaporate the OA/AB by a...

We can see a spread of dangerous virus which ends in dead hives, but that do not automatically indicate that the oxalic acid itself does a less effective job. Here are more factors, like the location of the varroa during the treatment. Are the varroa sitting under the abdomen between the...

Hello from Norway. So fare nobody mention the different between oxalic acid and the acaricides making resistence. It is very important to see the differences to understand the effect of oxalic acid. Oxalic acid is an acid which can not be directly compared with the acaricides. Varroa forms...