von tail__ » 14. Mär 2009 08:56
I've read the acid therapy often helps. The organic acids are very toxic for mites, and much less for ants. Spraying formic acid fumes into nest should kill mites without harming insects - but you need to do it slowly and carefully, too much will be lethal also to ants. Otherwise, you may try some special anti-mite substances used by bee keepers for the same purpose - they are quite expensive though, and you would need much less than for honey bee hive, maybe if you know some bee keeper he might give you a bit for free.