SPRAY DAY:  At this time, it has been determined that spraying will occur after sunrise on Monday, May 23, 2022.  The timing of the treatment depends upon weather conditions and could be subject to change.  Backup date will be Tuesday, May 24, 2022. 

On May 12 or May 13, 2022 you were sent an email regarding the aerial application of Bt by a low flying airplane in selected areas of Macomb County for Gypsy Moth suppression. This second email is being sent to provide the spray date. 

SPRAY BLOCK MAPS: Spray Block maps are available at this link for the MSU Extension page of the Macomb County website:

EMERGENCY SERVICE AGENCIES NOTIFIED:  This email displays the addresses for those agencies that are being notified of the spray day.  If you know of another agency that should be notified, please forward this email to them.  Schools are being notified by a separate email.  Please do not forward this email to homeowners.  Homeowners in spray blocks have been previously notified by mail.

PRODUCT INFORMATION: The biological insecticide being used is Bacillus thuringiensis, subsp. kurstaki – Foray 48B, commonly known as Bt. It is a naturally occurring soil bacteria.

QUESTIONS: If you have any questions, or to obtain information, you may contact Terry Gibb at or call the Macomb County Michigan State University Extension office at 586-469-6432. 

Thank you.

Meghan Cassidy
Senior Office Assistant
Macomb County MSU Extension
21885 Dunham Rd., Suite 12
Clinton Twp., MI  48036
phone: 586-469-6440
fax: 586-469-6948
Work Cell Phone Number:  586-839-3379