I asked from Finland's main beekeeping educator, what he has found about big losses in some areas.
- What you mean?
- When we talked last, you were going to look 150 hives yard where every single hive had died last winter.
- Yes, varroa loads were heavy. They had treated too lightly in August the colonies. Only 5 day treatment and then oxalic trickling too early.
A beekeeper was very experienced but that happened.
4-5 years ago our main educator wrote wrote that he has not nothing to say any more because things go fine with varroa.
But then everything turned around. Hives started to die more and more.
They say that varroa has become more danger because side diseases like viruses are more angry.
It seems too, that even if modern treatments promise 96% reduction in mites, too often reduction is only 70-80%. That leave too much living mites into the hive.
I have found myself, that when I have a feeling that I know this thing, the varroa hits back worse than ever.
Nowadays countries tell about big hives losses purely for varroa.