I just started killing them in October. I was walking in downtown Leesburg, VA and they were everywhere. Then visited Carlisle, PA a few weeks back and it was insane. They kept landing on me while I was sitting outside. I feel bad for squashing but they are insanely invasive and Loudoun County's grape and hops growers are getting hammered by them. (Yes, they are pretty.)

After a couple of seasons they became part of the local diet for birds and other insects.

I think our warm fall weather is extending their season.

I remember couple of years ago, I first saw them in late spring. I mistook them for ladybugs, but then I realized they were SLFs that weren't fully grown. I started stamping on them everywhere. But of course, nothing stops them. Only a hard, cold winter might do them in.

Two spruce trees in the front yard are about 60 or 70 years old, and they have to be cut down. There's a green mold that looks like lichen growing and spreading upwards on the branches.

Separate issue though - it's got nothing to do with the spotted lanternflies.

They may have information to save the trees.