So yeah, I have no clue. It's a crystalline like build up all over the branches. When scraped it almost seems like it's part of the trees tissue because it is green and wet under like I've dug into the meat of the branch. I had an issue with aphids (nothing crazy) and fought them for the past couple months while they were outside this summer. Brought them in 2 weeks ago and found this today.... Please help, any advice is appreciated! Thank you!