Spongy Moth Management is Proposed in the City of Rochester

The Minnesota Department of Agriculture (MDA), in collaboration with federal partners, has identified three areas in the City of Rochester that need to be managed to slow the spread of spongy moth in Minnesota.

What is spongy moth?

Spongy moth (Lymantria dispar) is an invasive insect that is a significant threat to the economy, environment, and human health. Spongy moth has caused billions of dollars in property damage and defoliated millions of acres of forest. Spongy moth caterpillars can feed on over 300 tree species, including some of Minnesota's most common trees.

How is spongy moth proposed to be managed?

The proposal is to use a mating disruption product, SPLAT GM-O (Specialized Pheromone and Lure Application Technology Gypsy Moth-Organic). This is a pheromone that stops male moths from finding females, preventing mating. It is applied via low flying aircraft to the tree canopies. Applications could happen early in the mornings, with planes often flying in the area for several hours.

SPLAT GM-O is harmless to humans and animals. All the ingredients in SPLAT GM-O are listed by the EPA as safe.

When would the proposed management happen?

If approved, aerial management activities in southern Minnesota would likely occur mid-June to early July, while activities in northern Minnesota would likely take place mid-late July. More specific management dates will be provided closer to the implementation period. However, timing is dependent on weather and insect development.

What areas of the city are being proposed for management activity?

An interactive map of proposed spongy moth management activity is available on the MDA website.

How do I stay informed or get more information:

An informational public open house is being held on March 31 from 4:30 p.m. - 6:00 p.m. at the Development Services & Infrastructure Center (DSIC). More information is available at https://www.mda.state.mn.us/smmanagement. You can also sign up for text or email alerts to stay up to date on the management proposal by visiting the MDA website.

For questions, comments, or concerns, email [email protected] or call 1-888-545-6684.