Our neighbor has a large lilac bush, and my wife noticed inside on the bottom of the bush was a nest. We are unsure if the nest is from a tent caterpillar or a gypsy moth. Do either, or both, of these pests attack lilac bushes? If so, what should our neighbor do to salvage the bush?
Certified GKH Gardening Expert
Yes, these pests can occasionally affect lilacs. Here is more information that may help: