I learned about Wooly Alder Aphids a long time ago and wrote about them here. I learned this week that Alder is not the only tree that has its very own aphid. Beech trees can play host, too, to another species of wooly aphid.
Like all aphids, this variety has a piercing mouth part which it uses to get beneath the surface of the plant in order to suck juices.
Like other woolies, this variety carries waxy threads on its body.
According to one source, it is rare that an infestation is severe enough to do any real damage to the tree. I question that as it concerns our beech, already under attack by Beech Bark Disease (caused by a fungus introduced by a scale insect).
I’ve walked this woods frequently for a lot of years and never noticed this aphid before. I will be curious to see what happens.