By Scout Nelson
The Minnesota Department of Agriculture (MDA) has announced a temporary quarantine in parts of Coon Rapids, Grand Rapids, and Winona to manage spongy moth infestations. The quarantine will be active from May 1, 2025, to June 15, 2026.
This action limits the movement of woody materials like trees, branches, and firewood out of the affected areas. Even if tree limbs are chipped, spongy moth eggs may still survive, so all woody debris must stay on the property.
The quarantine also requires residents to self-inspect outdoor items such as wood pallets, patio furniture, grills, campers, and boats before moving them out of the area. Items should be checked for tan, fuzzy spongy moth egg masses about the size of a quarter. If found, residents must scrape them off or leave the item behind.
High levels of spongy moths were found in Coon Rapids and Grand Rapids during the MDA’s 2024 survey. In Winona, the infestation was reported by city campground employees. Aerial management using Btk, a natural insecticide, was planned but had to be canceled due to federal funding delays.
Spongy moths pose a serious threat, feeding on over 300 species of trees and shrubs, including oak, aspen, basswood, and birch. Large infestations can strip forests bare, causing significant environmental and economic damage.
To assist residents, the MDA is holding two informational meetings: an in-person session on April 30 in Coon Rapids and a virtual meeting on April 29 via Microsoft Teams.
Survey efforts will increase in the quarantined areas, and traps will be placed on trees. Residents are encouraged to report any signs of spongy moths using the MDA’s online Report a Pest service, email, or hotline.
Photo Credit:minnesota-department-of-agriculture
Categories: Minnesota, General