Currently most beekeepers in the UK use Epoxy Resin Coated mesh, developed in Germany I believe in order to resist the corrosive effects of Formic acid?
My experience with Apiguard in the UK is that the efficacy is quite variable within one apiary, it is very dependant on ambient temperature and also colony size and condition. 65% to 95% effective
monitoring is a necessity. Also with resistance creeping across the country Apistan in my part of the country is about the same
Regards Andy Johnston
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