Rusty red, worm-like discharge from apple tree trunks?
Hello everyone 🙂 Can anyone tell me what's wrong with my little apple tree? See picture. The rust-red discharge is crumbly and can be removed in one go. But the resin would be honey-like, right? I haven't noticed any pests, apart from a few ants. The discharge is "growing back," though, and the tree has…