The bees don't seem to particularly appreciate pristine new looking
excluders, they like a bit of coating, but I have noticed that they are
fussy about the dimensional construction of excluders.
Here in the uk, some of the equipment makers construct wire excluders
with the wire in the centre of the frame(incorrectly IMO), some with the
wire neatly set in a wire depth on the underside of the frame(underside
for top beespace hives). The centred ones are always more waxed than the
offset ones, I guess because the bees are confused as to where the
beespace is. (All components put on the hive should have a clear top
beespace and no underspace)
Alan Riach
Edinburgh

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