On Mon, Sep 2, 2013 at 1:47 PM, Medhat Nasr <[log in to unmask]> wrote: In cases like formic acid, it can penetrate the cell capping that is made of wax and pollen. If the fume concentration is high enough, it can kill male mite as observed in MAQS application. Medhat, so what's your take on fume concentration vs concentration of the acid itself? I ask since maqs are 45% and those who make their own use 65% Which kills male mites quicker? or were they always killed with 65% and to sell maqs they throw in the gimmick -- kills male mites. Walter littlewolfapiaries.com *********************************************** 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