> I submit for consideration that the AFB vectors are hive-to-hive movement of frames/gear with spores, and robbing, not drifting.
I agree 100% with this. I would treat the yard, as any and all hives may be involved in robbing. There is the insidious robbing of weakened colonies which is not noticed by the beekeeper, as well as the more obvious plundering of a defenseless colony. Numerous authors have debunked the notion that drifting is a significant mode of disease transmission.
PLB
***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html