It looks like buying 10 to 49 Apivar 50 packs a colony treatment would run you $4.68 per brood chamber. Seems a bit pricey, but is it if it works well? Less mess and safer to handle than MAQS. And MAQS aren't all that less in cost per recommended treatment.
What do you commercial guys think? I'm thinking about installing them in colonies in the south in April so I can take them out well before honey supers need to go on in NY.
Maybe this time of year OA dribble is the way to go?