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[Jim Fruth <jfruth@uslink.net>]

   For my wild population of Mason Bees, I keep 1/4" cardboard tubes, 5/16"
plastic tubing and 3/16" drinking straws handy for them.  They use the
drinking straws most often.
   This year something strange has happened:  I have always saw mud having
been used to seal the entrance but this year some of the 1/4" tubes are
sealed with a mucilaginous substance.  Does anyone know what this substance
might be or what insect may have did it?
Thanks,
-- 
Jim Fruth
Brambleberry Farm
Pequot Lakes, MN
www.bberryfarm.com