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formic acid Only loosely connected to the current topic, but perhaps some of the contributors have experience of summer formic treatmentand can advise. i've now applied 140ml/65% formic acid to 4 hives, used an insulated eke and appear to have had reasonably consistent evapouration over 8...

Good informative thread thanks but is this effective against cerana? which has almost cleaned me out this year. Standard nosema has been more of an inconvenience over the years during tmes of stress

Just started following this website so apologies for silly question. Just ploughed through 10 pages and found some fellow travellers still gassing their bees (themselves) with OA, I wouldn't claim to have enough consistent hives to give good comparisons, but I've been treating in September...

Thanks for that, hadn't seen it mentioned for a while and wondered.

Does no one use sublimation for applying OA, I've been using it for 2 yeas and quite like the knockdown effect. am I missing something

A note from the north, my first hives were marine ply and 25 years later still in use, I prefer my cedar hives acquired second hand mainly for weight and prettier.