The research says
- After a 60-year hiatus from U.S. golf courses, the green stinkworm (Amynthas hupeiensis), a native of East Asia whose prolific casts disrupt play and maintenance, has been found on several courses in Kentucky.
- No castings or signs of the earthworms appeared in greens in winter, but adults and juveniles were found in the greens’ surrounds, where they likely overwinter until early spring, when they migrate to the greens.
- Asian earthworms are aggressive invaders and have become established around the banks of lakes and rivers as the result of anglers discarding bait. They may also be transported as cocoons in compost, mulch or soil. A single cocoon could potentially establish a population.
- No products are currently registered for green stinkworm control. As a side effect of treating for nuisance ants with either of two neonicotinoid-pyrethroid combination insecticides, nearly 100% control of worms was achieved for at least eight weeks after application.