Originally Posted by
fatshark
No I don't. It's certainly 'good enough' and mite levels have been very low. However, I've done no side-by-side comparisons that would stand any sort of scrutiny.
However, unlike Apiguard, OA (Api-Bioxal etc.) treatment by vaporisation does not seem to stop the queen from laying as it often does with Apiguard. Since treatment usually coincides with the important egg-laying for generating the winter bees I think this is a significant benefit.
The other thing I have to consider is temperature. Having moved to balmy Fife in 2015 the autumn temperatures are sometimes borderline for Apiguard treatment after the summer honey is taken off. I don't currently take my bees to the heather, but once you're into September the likelihood of getting the necessary 15C for Apiguard is much less than it was when I was living in the Midlands.
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