Replikant
Sapling
Can anyone nail this one? Not sure what disease I am dealing with here on my crab apple bonsai. Powdery mildew, cedar apple rust, fire blight??? Any help appreciated. Have used some foliar based systemic fungicides but none copper based. 2 applications and still the same you see below. Was thinking of partial defoliation as a last resort. I had already cut some leaves in half to allow more light in. Most of what you see is only on one side of the tree's foliage btw.