Lymantria Dispar (formerly gypsy moth)

Outbreaks of Lymantria dispar are not frequent but are unpleasant to live with when they do occur. Learn more about why populations grow and collapse and how you can deal with their impact.

Lymantria dispar, formerly gypsy moth, caterpillars feed on the leaves of oaks, aspen, crabapple and many other types of trees. Outbreaks of Lymantria dispar are not frequent but when they occur, it can be unpleasant to live, work or recreate in an affected area. Lymantria dispar caterpillars can be so abundant that many trees will be completely defoliated by early July. Several areas in Michigan experienced Lymantria dispar outbreaks during 2019, and populations may be high in some areas again during summer 2020. The links below provide information about Lymantria dispar, how it affects your trees and options for dealing with this invasive pest.

News

Lymantria Dispar (formerly gypsy moth)

About

Resources

Events

  • Spartans Will.
  • © Michigan State University
Michigan State University wordmark

MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential.

Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Quentin Tyler, Director, MSU Extension, East Lansing, MI 48824. This information is for educational purposes only. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.

The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707.

We comply with the Federal Trade Commission 1998 Children’s Online Privacy Protection Act (COPPA).