By Andi Anderson
New research from Michigan State University underscores the dire threat posed by the emerald ash borer (EAB) to black ash trees in the U.S. and Canada, trees of immense cultural significance to Indigenous communities. The findings reveal that these invasive pests are jeopardizing the entire native range of black ash trees, used for generations in traditional basket making and other cultural practices.
EAB, originally from Asia, was first identified in 2002 and has become the most destructive forest insect in North America. While adult EAB beetles cause minimal damage by nibbling on ash leaves, it's their larval stage that inflicts real harm. Larvae burrow beneath the bark, forming tunnels that hinder the tree's nutrient and water transport, leading to limb and tree death.
Black ash trees are particularly vulnerable, with studies showing that EAB beetles strongly prefer them over other ash species. As of 2020, EAB had invaded nearly 60% of the black ash's native range, spreading at an alarming rate. Projections suggest that over 75% of the black ash basal area will be lost by 2035, impacting Indigenous populations who depend on these trees.
Efforts to combat EAB have seen limited success, but there is hope in the form of insecticides, girdling, and other strategies. Collaboration between scientists, Indigenous experts, and resource managers is crucial to preserving this invaluable cultural and ecological resource.
In the face of this threat, Indigenous communities are exploring ways to safeguard harvested black ash logs from EAB, such as submerging them in water. The urgency is clear: preserving black ash resources is essential for the continuity of cultural practices and the health of these unique trees.
Photo Credit: istock-georgeclerk
Categories: Michigan, Rural Lifestyle