Greetings Mirai Forum, I need assistance identifying what I believe is a fungus that has infected most of my trees. The fungus is noticeable from the small fruiting bodies that emerge from individual leaves and the eventual premature yellowing of leaves starting from the base of the leaf out. Symptoms seem to start right around this time of year and continue into the fall. Attached photos show both the fruiting bodies and leaf damage symptoms.
I first noticed it in the fall of 2019 on some larch and a fir which have, unfortunately, all since died. I started alternate spraying with cooper fungicide and bonide fruit tree fungicide/insecticide (active fungicide is captan) on a regular basis but noticed the issue again last year and ramped up the frequency of spraying. It doesn’t seem to have helped since I’m noticing the fruiting bodies emerging from leaves again this year. It seems to have infected a bunch of different species including Chinese/American elm, mulberry, juniper, hinoki cypress, Japanese maple, cotoneaster, hemlock, azalea, mugo pine, and bald cypress. Essentially it doesn’t seem to be effecting certain species versus others and has spread to more trees this year. The fungicide I’m using is either not effective against whatever this is or I’m still not spraying frequently enough and/or at the right time of year.
Does anyone know what this infestation is and how I can combat it? I know Ryan recommends Clearys 3336 and Mancozeb but without knowing what I’m dealing with I don’t want to start spraying random fungicides again to no improvement. I really don’t want to lose any more trees to this as they’re already stressed from previous infections. Any and all help is super appreciated!
I hope everyone’s trees and doing better than mine