I have never had any problem with this 15 yo Pawpaw. This year there are dry, crusty spots on the underside of 20% of the leaves. The health is robust and there is fruit but I would like to know the cause of the small spots. I have watered more heavily than usual this year to help my first time ever gypsum application to soak into the clay soil here in western PA. The tree gets morning shade and four hours of PM sun.