Asian Jumping Worms Found in California and Several Other States

Agriculture authorities reported the presence of the Asian jumping worm, a highly invasive species, in multiple states including California. The worm degrades soil structure, harms plant roots and accelerates soil drying, according to the Colorado Department of Agriculture. It creates a nutrient-poor paradox where nutrients are present but unavailable to plants, the department stated.

This can exacerbate drought conditions in California, the department added. The Asian jumping worm is smooth, dark gray or brown, with a distinctive flat, milky-white band circling its body near the head. It can flip its body a foot into the air and exhibits violent thrashing behavior.

If grabbed by the tail, the worm can snap it off to escape. The species reproduces without mating, with every worm capable of producing offspring on its own. Just one worm or a tiny cocoon hidden in soil or mulch can trigger a full-blown infestation in a new location.

Researchers have found the worm is toxic to certain native birds and salamanders. There are currently no registered pesticide products for the Asian jumping worm, according to the University of California Agriculture and Natural Resources. Using pesticide products not intended or labeled for the worm is illegal, the organization stated.

Officials recommend that bulk mulch or compost be heat-treated to at least 130°F for three days to destroy hidden cocoons. New York Post reported that the worms' hyper-activity degrades the soil structure, can harm plant roots and accelerate soil drying.

Beyond soil damage, the worms pose threats to wildlife by being toxic to native birds and salamanders, disrupting ecosystems. Officials urge residents to inspect materials brought into gardens and choose bare-root plants when possible.