Hi Stuart

My thoughts are always to take the honey supers off before treating.

Here is what Vita Bee Health say in their Frequently asked Questions pdf about supers.

“Should I use Apiguard when supers are on the hive?

It is preferable to remove supers before treating with Apiguard. Apiguard may taint honey in supers,
but it is unlikely, especially if the honey stores are sealed. Apiguard may taint the brood wax, and low
traces may reach the wax of the supers. If you do use Apiguard when supers are in place, make sure
that the Apiguard is positioned immediately above the brood nest and that the bees have enough room
to get into the tray and to walk through the gel. Honey collected during Apiguard treatment can be fed
back to the bees. “

Another great blog.

However, I thought that you were not allowed to treat using Apiguard with supers on ?

Can you give your thoughts on this please ?