Hemlock Woolly Adelgid Survey - Cassadaga Lakes Nature Park

Every winter, we conduct Hemlock Woolly Adelgid (HWA) surveys across the region. Register now to help survey hemlock trees at the Cassadaga Lakes Nature Park preserve for the invasive hemlock woolly adelgid.

HWA is most visible in winter. In the coldest months, the aphids go dormant and form cotton-like protective balls at the bases of hemlock needles, making it easy to observe and diagnose. This dormant period also makes it much less likely for surveyors to accidentally spread HWA from tree to tree by physically touching multiple hemlocks in an area during a survey.

By surveying local hemlock trees and reporting any HWA we observe on them, we can help with the implementation of targeted treatment plans to manage the infestations and prevent further spread.