The Village of East Dundee has documented infestations of the invasive moth species Lymantria disbar, or Spongy Moth (previously referred to as Gypsy Moth). In the spring, the caterpillars of this invasive moth species feed on the leaves of hardwood trees, preferably oak trees. Spongy moth caterpillar infestations can defoliate entire tree canopies, which can weaken the trees and may ultimately kill them. In an effort to eradicate spongy moth from East Dundee, the Village is implementing a pest management program that involves the aerial application of Bacillus thuringiensis subspecies ‘kurstaki’ (Btk), which is a bacterium found naturally on leaves and in the soil. It is known only to affect caterpillars of moths and butterflies that are actively feeding at the time of treatment.
This treatment program involves two applications of Btk, both by helicopter. The first application of Btk occurred last week, and the second application is planned for Friday, May 26. The current weather forecast is favorable for this spray event.
Timing of the aerial application on Friday, May 26:
Start: approximately 6:00 am
End: approximately 9:00 am
Should you go indoors during/after the aerial treatment?
The Illinois Department of Agriculture indicates that although Btk is one of the safest pest control methods available, residents may choose to minimize their exposure to the Btk spray. Remaining indoors at least 10 minutes after the aircraft (helicopter) has finished spraying is recommended. If for some reason you come in contact with Btk spray, wash the affected area with soap and water. Click Here for more information about Btk and its use for controlling the spread of spongy moth.
Click HERE and select the "Spongy Gypsy Moth" link for a map of the treatment area (also shown above), and for more general information regarding the spongy moth.