Quote Originally Posted by gavin View Post
Back to Nellie's original post - is there a good reason for going to 38mm? .
It has been suggested that wider spacing impedes varroa activity. A nearby beekeeper is doing some experiments. Last time I heard, he had not given up, so there may be something in it.

(He mixes long, short and absent spacers, both metal and plastic, to get a variety of spaces...)

Savoyard