Knowledgebase
Roly-polies in compost #908773
Asked July 07, 2025, 3:52 PM EDT
Anne Arundel County Maryland
Expert Response
Hi Leann,
Thank you for your question.
Rolly Pollies, Pillbugs (Armadillididae vulagare) and sowbugs are not insects or true bugs. They are soil-dwelling crustaceans in the order Isopoda (called isopods). They feed primarily on decaying plant material and occur mostly hidden under organic litter or other debris on the ground and beneath low-growing plant parts. They play.a beneficial role in your compost by breaking down and recycling nutrient matter. Sowbugs can occasionally chew on seedlings and the lower leaves of sweet potato plants, but they generally do not pose a significant threat to mature plants. They primarily feed on decaying organic matter especially in moist conditions, so their impact on healthy plants is usually minimal. If your seedlings are very young and in a damp area and your compost is overrun by Pillbugs you may sift the compost through an appropriately gauged screen or commercially available compost sifter that will remove large debris as well as the bugs. Return the bugs and large leaf debris back to the compost pile as the Pillbugs are hard at work decomposing leaf matter.
I hope you find this information helpful. Please let us know if you have any further question.
Christine