Zach Huang did the research on heating drone frames - but his Mite Zapper kills everything and then the bees clean out. Like freezing without the fuss. But it requires his Zapper frames and a power source and has to be activated periodically. We used some for a demo for Army - a way a soldier could effect some varroa control without opening hives.
***********************************************
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