>I put a teaspoon of thymol crystals in a teabag (emptied of tea and stapled to avoid spills) above the centre of the brood area after the supers have been removed.
It can be easier than that - 8g (2 tsps) in a honey jar lid placed on the excluder; repeat at weekly intervals for three or four treatments.
Best wishes
Peter
52°14'44.44"N, 1°50'35"W
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