In the post about using powdered sugar Janet mentioned using 7-10 days treatment intervals just as with sucrocide. I was just on the phone yesterday with a beekeeper in Florida who mentioned using oxalic at similar intervals. I wanted to question the timing. 7-10 days would obviously span a full brood cycle, but isn't the whole uncapped phase of the cycle unimportant. My understanding is that varroa mites infest a cell just shortly before it's capped. If the capped phase is what's significant wouldn't three treatments be more effective at 5 day intervals (to span the longest capped phase cycle of the drones)? Of course, what I'm saying would only apply to treatments without continuing kill effects (like sucrocide, oxalic, powdered sugar, fogging, etc.) -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---