We've discussed the treat of tracheal mites (TM) here before. Some of us
were saying we never treat any more, that TM is no longer a threat.
Then, several years ago, TM related losses were again reported and we
changed our tune. We started to test and to treat.
A chart I saw at Baton Rouge sheds light on why some say TM is no threat and
others say that it is eating their bees alive, and the rest of us are not
sure.
I've posted the chart and some comments at
http://www.honeybeeworld.com/diary/
allen
http://www.internode.net/HoneyBee/