Rimantas Zujus <[log in to unmask]> wrote:
 
 
>This year we had more wasps than usually. Since August I noticed wasps to
be
>very brave and aggressive. No nectar flow, no kindness. Some bee keepers
>lost a part of their colonies.
 
RZ!
I have some experiences about it. And I assert that wasps are brave and
aggresive only when feel weak colony. I thouhgt like you 3 years ago and
lost all my four colonies. I think you have the same problem.
 
Andrzej