Does anyone know if rhubarb in the compost pile is a bad thing? I put leaves in my rainbarrels so the mosquitoes don't lay the larvae, so have usually burned the leaves in the fall. Good question as to whether they can be used as a slug repellant. Of my 10 hostas, the slugs go for 1, so I think of it as the sacrificial plant. Go figure, it usually starts out as the strongest.
They are fine in compost for me.
I use them as a weed repellent in the potato patch too. The leaves make a nice insect repellent by boiling them, straining then adding water & left over bar soap slivers. Works for cabbage loopers etc.