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Message: <blockquote data-quote="Alastair" data-source="post: 13995" data-attributes="member: 13">I'm using Nassenheider formic acid dispenser units as per the photo. I can't give a 100% answer exactly how to use them because I am still on a learning curve myself, and have made many mistakes, but slowly working things out. What is working best so far is two ten day treatments back to back, in hot weather in Autumn using 250 mls of 65% formic acid per treatment, and in cold spring weather using 250 mls per treatment 84% formic acid. It is very difficult getting it right, overdo it and you kill bees, under do it and you don't kill the mites. But right now for me anyhow, not much else works reliably. Using the Formic Pro pads achieves the same thing, but way more expensive.[ATTACH=full]1880[/ATTACH]</blockquote>

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