Residents of Cass, Isanti, and Kanabec Counties are urged to be vigilant as the Minnesota Department of Agriculture held an informational meeting on January 25, 2024, focusing on the Emerald Ash Borer (EAB) and its impact on local ash trees. The meeting highlighted critical signs of infestation and the importance of early detection to protect the region's ash tree population.

One of the key takeaways from the meeting was the identification of the distinctive D-shaped exit holes left by EAB when they emerge from trees. Experts emphasized that these holes are often found high in the tree canopy, making them difficult to spot. Participants were advised that if they see these holes at eye level, it likely indicates significant damage higher up in the tree. The meeting also addressed common misconceptions, noting that many reports of EAB sightings are often confused with native insects, such as the six-spotted tiger beetle.

Woodpecker feeding damage was identified as a crucial indicator of EAB presence. Woodpeckers tend to target infested trees, leaving behind distinct signs such as bark blonding and small, shallow holes. Observers were encouraged to look for these signs in the upper canopy of trees, as EAB typically begins infesting branches that receive the most sunlight.

Additionally, the meeting covered other symptoms of EAB infestation, including bark splits and canopy thinning. As trees attempt to heal from the damage caused by EAB larvae, they may develop vertical splits in the bark, which can reveal the S-shaped feeding galleries beneath. Canopy thinning is another sign that can indicate a tree is under stress from EAB.

The Minnesota Department of Agriculture is committed to providing resources and information to help residents identify and manage EAB infestations. As the threat of EAB continues to grow, community awareness and proactive measures will be essential in preserving the health of local ash trees. Residents are encouraged to report any suspected infestations and seek guidance on best practices for tree care and management.