Finski, do you think Varroa does better in cold or warm?
In cold, the bees are in a tight cluster and it would seem the Varroa might have an easier choice of hosts to suck on. If the bees are warmer and spread out more, maybe more Varroa falls off the bees and lowers the amount of mites in the hive?
I have no idea, I’m just wondering if you have an opinion based upon your experience?
our varroa expert says that varroa dead rate is same as wintering bees. In finland 50%.
In warm climate brood season is longer and varroa douple itsel every month.
In very warm plases there ar no brood brake. Killing varroa is difficult.
In NEW Zealand there was plenty of feral hives and nursed bees robbed varroa weakened hives and got a huge mite load there. Hives died in few weeks.
Warm or cold hive, bees regulate their temperature and it helps nothing in varroa control.