A: The bumps in the lawn are made of worm castings (poop). Most of the time, the castings are small piles that are not a problem, but they can be large enough to make walking in a lawn uncomfortable.

Question: I have a problem in my lawn. Worms make it so bumpy that I can hardly walk in my yard without twisting my ankle. Any suggestions?

Worm castings owe their pest control capacity to chitinase, an enzyme that breaks down chitin, an integral constituent of insect exoskeletons, fungus cell walls, and nematode eggshells.

Earthworms living in the soil come to the surface to deposit their castings (excrement). They are especially likely to come to the surface when the weather is rainy. (Photo courtesy of John and ...

RACINE COUNTY — Unco Industries, the producer of Wiggle Worm Soil Builder, is currently growing like a tomato plant started with a healthy handful of worm castings. Unco, based at 7802 Old ...