I think charcoal (bio char) on foot paths may be a good way to slow the spread of jumping worms. These worms love to live in and eat wood chips, so they lay their cocoons there (each worm lays 60-100 cocoons per year each with 1-2 eggs inside and cocoons is the size of a mustard seed). Then the cocoons attach to our boot soles and we spread them around our land, where they grow into more worms. Biochar can, depending on the size of the granules (I have read) be disruptive for the digestive systems of these worms. I may try this charcoal idea on one of our paths. I understand the problem people here have here with making a mess, but I’m more deeply concerned about the damage to the soil from these worms.