I do not know why I am taking the risk to jump in the arena. Just for the fun of pleasant debates I guess... :-) It appears FGMO efficiency quadrature will not be solved today. Yet I have a question in my mind since 3 years about it : How does FGMO fogging work ? The last hypothesis I remember was that droplets prevent varroas from breathing. If so, why results seems to vary so much from one test to another ? Adding another anecdote to the pile : I have measured varroas on oily coroplast every 24h before fogging for 3 days and then 5 hrs, 12 hrs, and 24 hrs after fogging. I have not measured any significativ increase of fallen mites with FGMO alone. But it was just me, doing a couple of tests on a couple of hives. I do not claim for any conclusion. But I am wondering if struggling is the real mechanism. And if they can't breath because of FGMO, why bee larvea can ? Hervé Qc, Canada www.emelys.com PS: as per litterature, and as you noticed, AO drizzling is known to work when there is no brood, applied by a scientist or non scientist... ;-) Vous manquez d’espace pour stocker vos mails ? Yahoo! Mail vous offre GRATUITEMENT 100 Mo ! Créez votre Yahoo! Mail sur http://fr.benefits.yahoo.com/ Le nouveau Yahoo! Messenger est arrivé ! Découvrez toutes les nouveautés pour dialoguer instantanément avec vos amis. A télécharger gratuitement sur http://fr.messenger.yahoo.com :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::