Just a few quick observations from this part of Vermont.
Episodic leaf curling is slowly, but steadily increasing in severity, frequency and duration.
It is now apparent nearly every morning and in the past two weeks has persisted throughout the day although the curling lessens as the day passes then will often worsen slightly in the evening. More and more of the upper tree crowns are affected and the amount of curling on individual leaves is slightly increasing on average. Still the episodic leaf curling remains inconsistent with no visible symptoms on some days. I still can not make any correlation with weather or any other influence other than time of day. Rapid yellowing and browning of hemlock and red spruce branchlets along with needle drop appears to be quite serious and widespread.