Oxalic acid - vapourise or trickle (and may have been spray, at one time).
Treat as a single box. Trickle from above, they may well be a little higher than when you last looked! Do not go splitting the cluster in these conditions (or any others for that matter)! 5ml per seam of bees. Should take less than not very long to do it.
I thought it was all in there.....somewhere.
Regards, RAB
Take a torch to look down the seams to see where the bees are, it does help.
Peter
As already suggested treat double as one box and trickle from top onto the bees. Take a torch to look down the seams to see where the bees are, it does help.
Peter
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