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Indiana Department of Natural Resources

Entomology & Plant Pathology > Regulatory & Scientific Information > Gypsy Moth Gypsy Moth

Gypsy Moth larvaeThe gypsy moth, Lymantria dispar, is one of North America's most devastating invasive forest pests. The species originally evolved in Europe and Asia and has existed there for thousands of years. In the late 1860s, the European gypsy moth was accidentally introduced near Boston, MA by an amateur entomologist. Since then, gypsy moths have spread throughout the Northeast and into parts of the upper Midwest and Great Lakes states including Indiana.

The gypsy moth is known to feed on the foliage of hundreds of species of trees and shrubs in North America but prefers oak trees. When gypsy moth populations reach high levels, trees may be completely defoliated by feeding caterpillars. Several successive years of defoliation, along with contributions by other stress factors, often results in tree death. Gypsy moth can be an expensive, messy problem for homeowners and, when out of control, can cause extensive damage to U.S. forests.

Indiana citizens can help combat this pest by understanding the gypsy moth problem and learning about its management. Please use this website as a source of reliable, current information.

News & Events

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Maps of Treatment Areas for 2014

May 2014 Bt Treatment Maps

June 2014 Mating Disruption Maps

2014 Gypsy Moth Treatment Product Labels & MSDS Sheets

Mating Disruption Information

  • Disrupt II Product Label
  • Disrupt II MSDS Sheet
  • SPLAT Product Label
  • SPLAT MSDS Sheet
  • MICRO-TAC Product Label 
  • Q & A's about Mating Disruption
  • Btk Information

  • Foray 76B Product Label
  • Foray 76B MSDS Sheet
  • Q & A's about Bacillus thuringiensis var. kurstaki (Btk)
  • Commonly Asked Questions About Btk (Bacillus thuringiensis var. kurstaki)
  • Public Comment

    If you are unable to attend one of the public meetings, you may still view the information PowerPoint | PDF.

    We enjoy talking about gypsy moth and would like to answer your questions and hear your comments. The comment period on these proposed treatments ends ends 30 days after the public meeting.

    Mail to:
    Gypsy Moth 2014
    Indiana DNR, Division of Entomology & Plant Pathology
    402 W Washington St, W-290
    Indianapolis, IN 46204-2739

    Phone: (317) 232-4120
    Toll Free Number: (866) NO-EXOTIC (866-663-9684)

    For more information on the gypsy moth contact the Purdue Entomology Gypsy Moth Education Program at (765) 494-0822.

    2014 Indiana Environmental Assessment Documents

    Cooperative Eradication Gypsy Moth Project

    Cooperative Slow The Spread Gypsy Moth Project

    Cooperative Gypsy Moth Project Work and Safety Plan

    Public Meetings

    County Block Date Location Address Time Public Comment Deadline
    Allen/Whitley Arcola (MD) Wed, Jan. 29 Allen County Public Library - Aboite Branch 5630 Coventry Lane, Fort Wayne 3:30 pm EST
    6:30 pm EST
    Fri. Feb. 28
    4:30 pm EST
    Porter Valpo 1 (Btk), Valpo 2 (Btk), Westville (MD) Thu. Feb. 13 Valparaiso Public Library 103 Jefferson St. Valparaiso 6:00 pm CST Fri. Mar. 7
    4:30 pm EST
    Tippecanoe West Lafayette 1 (MD), West Lafayette 2 (Btk) Wed. Jan 22 Faith West Community Center 1920 Northwestern Ave
    West Lafayette
    3:00 pm and 6:00 pm EST Fri. Feb. 21
    4:30 pm EST
    Whitley Lorane (Btk) Thu. Jan 30 Peabody Library 1160 E State Road 205
    Columbia City
    6:00 pm EST Sat. Mar. 1
    4:30 pm EST



    • Slow The Spread
      This nonprofit organization was established for the purpose of aiding in the implementation of the U.S.D.A. National Slow the Spread of the Gypsy Moth Project. The National Slow the Spread of the Gypsy Moth Project is part of the U.S.D.A.'s national strategy for the gypsy moth management.
    • Purdue Entomology Gypsy Moth Site
      This web site provides information on the biology of the gypsy moth, what homeowners can do to lessen the effects of the insect, and access to brochures on treatments.
    • Pest Tracker from NAPIS
      This web site publishes survey maps for pests of agricultural and forest commodities and provides links to pest news and information.
    • Indiana's Strategic Plan for Gypsy Moth