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Gypsy moth treatments are scheduled to begin again on May 12
Start Date: 5/11/2017
Event Description:
Aerial treatments to slow the spread of gypsy moths will continue this week.

Treatments at sites in Fulton, Kosciusko, Marshall, Porter and Whitley counties were delayed due to wind and rain. Treatments have been rescheduled for Friday, May 12.

These treatments could be delayed again if weather changes.

Three sites in Kosciusko County and one site in Porter County will receive two treatments, spaced four to 10 days apart. All other sites will receive one treatment.

Detailed maps of the treatment sites can be found at

During treatments, people will see a yellow airplane flying 75-125 feet above the treetops, starting at sunrise and continuing through the day as long as weather and flight schedules permit. With favorable weather, treatments should be completed by late morning or early afternoon.

The airplanes distribute a spray containing the bacteria Bacillus thuringiensis var. kurstaki, often referred to as Btk, into the treetops of infested areas where gypsy moth caterpillars feed. Btk occurs naturally in soil. Btk kills gypsy moth caterpillars as they feed on tree leaves by disrupting their digestive systems.

Btk has been used for decades by organic gardeners and has an excellent safety record with people and animals. People who live or work near the treatment areas might choose to take common-sense precautions, including staying inside when the planes are flying, and for about 30 minutes after treatments are complete. This gives the material time to settle out of the air and adhere to treetops.

Additional treatments to slow the spread of gypsy moth are planned for mid- to late June in Fulton, Kosciusko, Miami, Porter and Wabash counties.

For more information, call 1-866-NO-EXOTIC (663-9684) or call the local county extension office at 1-888-EXT-INFO (1-888-398-4636).

To determine if your property is in the treatment areas and for more information about gypsy moth, see

To view all DNR news releases, please see
Contact Information:
Name: Megan Abraham
Phone: (317) 232-4189
State calendar entry type:
Press Release
State calendar entry category:
State calendar classification:
  • Residents
  • Visiting and Playing
  • Agency Name:
  • Natural Resources, Department of

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