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Gypsy moth treatments scheduled for May 7 at West Lafayette site
Start Date: 5/5/2017
Event Description:
Aerial treatments to slow the spread of invasive gypsy moths are scheduled to begin Sunday, May 7, at the West Lafayette site.

Detailed maps of treatment sites can be found at

The plane should arrive in West Lafayette at 6:30 a.m., and the treatment should take around 45 minutes.

Other sites scheduled for treatment are currently scheduled to begin on Tuesday, May 9, in Fulton, Kosciusko, Marshall, Porter, Tippecanoe, and Whitley counties.

Treatments could be delayed if weather conditions change or leaf development slows. 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.

During treatments, people will see a yellow airplane flying 75-125 feet above the treetops.
The airplanes distribute a spray containing the bacteria Bacillus thuringiensis var. kurstaki, often referred to as Btk, into the treetops of infested areas where non-native gypsy moth caterpillars feed. Btk occurs naturally in soil. It 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.

The gypsy moth is one of North America's most devastating invasive forest pests.

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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