06/11/2026
On Tuesday, June 9, forester Caitlin Cusack of the Vermont Land Trust and the Preserve Forest and Trails Steward treated 11 ash trees on the Preserve with an insecticide called emamectin. This is the second round of treatment which began in 2023 on a small stand of trees growing between Flatlanders and across Snicket.
Research has shown that creating numerous small stands of protected ash trees is one important tool to increase the chances that ash trees will remain on the Vermont landscape for future generations.
Emamectin is injected into the trunk of the tree close to the base. The tree's vascular system then transports the insecticide up the tree and into the canopy.
Unfortunately this strategy is both expensive and requires a long-term commitment.
However, the photos will show the reasoning behind our core goal. The tree with the lush canopy is one of the eleven that was first treated in 2023. The other photo shows three canopies of ash trees without protection which are growing mere yards away.
In the coming weeks the Steward will be leading a short hike along the trails, explaining EPT's response to the emerald ash borer (EAB) infestation as will as pointing out signs of beech leaf disease (BLD), first found on the Preserve in September 2025. If you have questions or would like more information on these two non-native introduced forest pests look for more information coming soon.
Thanks to Caitlin and VLT for all the help!