Gypsy Moth Suppression

Keeping Gypsy Moths Under Control

How to spot gypsy moths:
  • Color: Females are generally light tan with brown or dark tan bars on their wings. Female Gypsy Moths do not fly.
  • Caterpillars: Adult larvae develop five pairs of raised blue spots and six pairs of raised reddish spots on their bodies.
  • Egg masses: Found on the bark of trees, egg masses are most visible in the late fall after leaves have fallen. Egg masses are generally 1 1/2 inches long and shaped like teardrops. They appear to be wrapped in a tan-colored felt cloth. Viable egg masses are spongy, without noticeable exit holes. They also can be found under decks and on woodpiles, outdoor furniture and playground equipment. They should be removed or destroyed by April to prevent them from becoming caterpillars.
Report Gypsy Moth egg masses on your property for field verification by Kenosha County Land and Water Conservation Department staff in the fall at 262-857-1895. If gypsy moth egg masses are verified on your property, your property may be included as part of a treatment block for aerial spray application through the WDNR Gypsy Moth Suppression Program in spring.

Further Identification Tips

It is NOT a Gypsy Moth if it is:
  • Building a cottony nest or web in trees
  • A white moth that flies
  • Larger than a 50 cent piece and colorful
  • A caterpillar with long stripes on its back or sides
  • Flying in the springtime
To get more information about gypsy moths and their management call 1-800-642-MOTH (6684) or visit the UW-Extension Gypsy Moth website or the Wisconsin Gypsy Moth portal website.