Gypsy Moth

The gypsy moth, Lymantria dispar, is an exotic pest from Europe and northern Africa. This insect was brought into the United States as an experiment to improve the silkworm industry in 1869. A wind storm turned over the cages and released the insect into the forests of Massachusetts and this species has been causing serious harm to forests since that time. The caterpillars have a ravenous appetite for tree foliage of several hundred species, but oak leaves are their favorite food. Without corrective action, repeated defoliation of trees by gypsy moth caterpillars can cause tree death or weaken trees to attack by diseases and other insects. Iowa has monitored the westward expansion of this pest since 1970 using pheromone traps. A cooperative state and federal effort is addressing outreach and management plans. Check out the materials below for more information.

Upcoming Gypsy Moth Talks

Topic InformationDateTime
Topic: TBA
Host: TBA

Gypsy Moth News Releases

  1. Gypsy Moth Treatments – Dubuque
  2. Gypsy Moth Treatments – Allamakee
  3. Public Information Meetings for Gypsy Moth Management Scheduled in Northeast Iowa(April 1, 2013)
  4. Gypsy Moth Treatment News Release(June 20, 2011)
  5. Gypsy Moth Environmental Assessment
  6. Gypsy Moth Treatment Letter(June 15, 2011)
  7. Gypsy Moth Treatment Map
  8. Gypsy Moth Treatment Map-Jackson County-Andrew Site
  9. Gypsy Moth Treatment Map-Allamakee and Winneshiek Counties-Freeport Site
  10. Gypsy Moth Treatment Map-Allamakee County-Harper's Ferry Site
  11. Gypsy Moth Treatment Map-Jackson County-LaMotte Site
  12. Public Information Meetings for Gypsy Moth Management Scheduled in Northeast Iowa(February 11, 2011)

Frequently Asked Questions

  1. Gypsy Moth Mating Disruption (PDF)
  2. Your Next Move Gypsy Moth Free (PDF)

Gypsy Moth Controls

  1. Disrupt II Label
  2. Disrupt II MSDS
  3. SPLAT GM Label

Slow the Spread of Gypsy Moth

  1. Slow the Spread – Overview

Short Gypsy Moth Videos

  1. Gypsy Moths Decimate Forests (CBS News)
  2. Gypsy Moth VNR
  3. Gypsy Moth-A Balanced Perspective

Slide Presentations

  1. Iowa Proposed Gypsy Moth Treatments 2011 (PDF)

Visual Aids for Gypsy Moth Identification

  1. Gypsy Moth Image Gallery

Other Websites

  1. Iowa Gypsy Moth Website
  2. Iowa Tree Pests Website
  3. Don’t move Gypsy Moths (USDA)
  4. USDA Animal & Plant Health Inspection Service
  5. Illinois
  6. Wisconsin
  7. Minnesota

Contact information:
Mark Shour
Extension Program Specialist
10 Insectary Building
Iowa State University
Ames, IA 50011
(515) 294-5963

Page last updated: June 21, 2013