Impact of Forest Pests
Non‐native invasive species cause irreversible impacts on tree health and biodiversity. Three non‐native insects which currently threaten Vermont are the emerald ash borer (EAB), Asian longhorned beetle (ALB) and hemlock wooly adelgid (HWA). Only hemlock wooly adelgid is currently present in the state; emerald ash borer and Asian longhorned beetle are within fifty miles of Vermont’s border. Over half of the trees in Vermont are host species of one of these three insects.
Areas of potential risk have been mapped based on locations of host species and likelihood of insect introductions. Below you can view the susceptibility maps for EAB, ALB and HWA for Vermont that were developed as part of the state's Forest Action Plan.