Invasive to Watch: Gypsy moth
What is gypsy moth? Gypsy moth caterpillars feed on the leaves of over 500 species of trees. This invasive has infested the eastern half of Wisconsin and efforts are underway to slow the westward spread.
Why is it a problem? Populations of gypsy moth caterpillars reach outbreak levels every 10 years, during which entire forests can be defoliated. This defoliation threatens tree health by causing stress, making them more susceptible to damage by other pests, diseases and extreme weather conditions.
What can I do? Use the 25-mile rule! Wood coming or leaving your property should stay within a 25 mile radius. Also, learn how to identify gypsy moth from other caterpillars.
Want more information?
- Learn about the gypsy moth life cycle and when to look for caterpillars, moths and egg masses
- Check out this comprehensive gypsy moth management guide from the WDNR
- Request a “Best Management Practices for Invasive Species” (including pests!) book or CD for practical guidance on treating invasives