My new orchard mason bees came out this spring, pollinated my fruit trees and filled all the nesting tubes with eggs. Every tube had a nice little plug of mud in place, protecting the contents, and so it remained until this week. When I checked the bee shelter, about half of the plugs were broken as if something had broken in.
I've heard it's bad to disturb the tubes before late fall, but I'm considering taking them in for the year now, to protect them from whatever.
Well, then you probably can answer MY question. I hung a block that I bought with the holes already drilled. Two have been filled with wasps, but that's it. Did I need to fill the holes with the tubes as well for the bees to use them?