u/Joyous_Fiasco

What are these cocoon like things on these trees? I had this same thing take a tree out, a couple years ago. I had to replace that one. Now it seems to be spreading again throughout the trees. My landscaper won’t tell me what it is. He just says he’ll come spray. But I’d really like to know what it is so I can take care of it myself, because it takes him so long to get here sometimes it’s too late.