Michael Reddell wrote:
>
> CALIFORNIA buckeye is the culprit.  The big "horse chestnut" trees that
> most people think of are different, and apparently not a problem.
 
> The only solution I know of is to move the bees during buckeye bloom.
 
Excellent advice. Can only add that ABCand XYZ of Beekeeping also
suggests feeding sugar syrup and bee collected pollen from other plants
when the buckeyes are in bloom to dilute the buckeye nectar and pollen-
if you cannot move the hive.
Bill Truesdell
Bath, ME