I used a plastic queen excluder in 2 hives last year, and the bees
refused to go up into my honey supers.  After 2 months I figured I'd
better take it off, and a month later the supers were full.  I have since
learned not to bother with it if there is a layer of honey on top of the
brood seperating the nest and the honey supers.  Maybe the plastic is
"scratchy"?  I wonder if wooden ones are better, or even necessary?
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Cynthia in Houston, TX