The Minnesota Department of Agriculture (MDA) is preparing to conduct aerial management operations across five northern counties later this month. This initiative aims to slow the spread of the spongy moth, one of the nation’s most destructive invasive forest pests.
Between July 16 and July 22, weather permitting, MDA will target 24 designated sites in Aitkin, Carlton, Itasca, Pine, and St. Louis counties. Approximately 83,760 acres will be treated, with low-flying yellow planes beginning operations as early as 6:30 a.m. and continuing throughout the day. The MDA will employ a method known as mating disruption.
This involves spraying a waxy, food-grade substance infused with synthetic spongy moth pheromones from aircraft. The substance confuses male moths, making it challenging for them to locate females. Consequently, reproduction rates are reduced, and the number of caterpillars that feed on Minnesota’s trees the following year is ultimately decreased.
Public health and environmental safety
The MDA has stated that the treatment product poses no risk to humans, animals, birds, or beneficial insects.
The project, conducted in partnership with the U.S. Department of Agriculture’s Forest Service, aims to preserve forest health, property values, and the state’s tourism industry, all of which could be threatened by a large-scale spongy moth outbreak.
Unlike previous treatments that were canceled or postponed due to federal funding issues, this year’s plan is proceeding on schedule. The MDA has emphasized its ongoing monitoring of the impact of future federal budget decisions on its ability to manage spongy moth populations statewide.
Tools for residents
To assist Minnesotans in tracking their treatment schedules and locations, the Minnesota Department of Agriculture (MDA) has created an interactive online map. This map allows residents to enter their addresses and determine if they are within the designated treatment areas.
Additionally, the MDA’s website provides a static map and further information on spongy moth control. Residents can stay informed by signing up for email or text notifications through the interactive map.
For direct inquiries, the MDA has established a dedicated Report a Pest Info Line at 1-888-545-6684. During treatment days, pressing “0” will connect callers with a live representative.
Spongy moth threat continues to spread
Spongy moths, formerly known as gypsy moths, have wreaked havoc across the eastern United States, causing substantial tree damage and resulting in millions of dollars in losses.
In Minnesota, these moths pose a growing threat to native forests, particularly oak, birch, poplar, and willow trees. While the moths spread gradually on their own, human activities can expedite their movement.
To mitigate this issue, the Minnesota Department of Agriculture (MDA) strongly advises residents and visitors to refrain from transporting firewood or other outdoor items that may harbor moth eggs.
For ongoing updates and resources, visit www.mda.state.mn.us.
