Tracheal mite can be a real killer, especially in the
North.  A study done at the University of Guelph,
Ontario, by a grad student found that once the
temperature in the hive around the cluter dropped
below 4C the bees with tracheal mites couldn't get
enough oxygen.  

Good winter packing makes a difference and a proper
formic acid treatment (Mite-AwayII)once a year really
cleans it up.

David VanderDussen
Stirling, ON


--- Bill Truesdell <[log in to unmask]> wrote:

> >>  The 72% is an unheard of amount.
> When Tracheal first hit in the 80s those numbers
> were not unusual across 
> the nation.
> In Maine this winter we have reports of 80% losses
> by some beekeepers  
> but in every case so far it is either VM or TM. Lots
> of TM. 


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