Hello Jean-Marie & All,

If you too have met such phenomena, would you please take the time to
communicate the fact?

I have seen every case you talked about through the years but never at one
time.

My opinion is that you have got at least several problems.

Always eliminate the simple *first* such as mites etc.

Try new locations to see if pesticides are the problem. As a migratory
beekeeper my only and quickest solution to pesticides is to move the bees
away from the problem. I relocated two apiaries this season because of
pesticides. I do not have a clue as to the pesticide source but I recognize
the pesticide kill  and some of your observations do resemble  pesticide
kill.

try bees from a different breeder source in case genetics are the problem.

If the above does not solve the problem then I will give other
recommendations (if asked) which involve such things as changing all comb
etc. but the above should keep you busy for awhile.

Good luck!
Bob

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