Roly Poly, aka Sow Bugs, aka Pill Bugs, aka Wood Lice

Basically
good guys as they feed on decaying products so there is no need to bring out and big guns. Use slug and snail pellets if you think you have to use something.

They collect in long
undisturbed areas that are moist and dark. They leave when the area is
disturbed and/or dries out. Can do some minor damage to young seedlings
but that's not their preferred food and only a long term major infestation causes serious problems. Lots of discussions here about
them the search will pull up.

Dave