From there you may be able to learn more about the insects that you are having problems with and how to control them. My name is Alex Phipps. I would like to know what it eats as I have put it in a container for the day. Pillbugs are actually not insects. They belong to a group called isopods and are crustaceans like crabs and shrimp.
Most isopods live in the water but pillbugs are one of the few isopods to live on land.
They seem to be pretty flexible in what they eat and can occasionally be pests on seedling plants, etc. While we have not kept them as pets we would guess that things like alfalfa sprouts, small bits of vegetables, and maybe a little bit of dry dog or cat food would really be fine. So we suggest that you keep the pillbug in a container with some moisture, like a wet cotton ball available so the creature doesn't dry out. But then put small amounts of food in the container and change it when the food gets moldy. Try little bits of different food and find out what you pillbug prefers to eat, we expect it should be fairly flexible.