I use Bayer 3 in one when in doubt as a first defense. Also Daconil is oriented for fungus. I will use both at different times.

Thank you! Does this look like any fungus you have dealt with?

NO , I have not dealt with this one. I really don't know a fungus from other stuff. I see spots and then I Spray & Pray, and I hope it goes away. I know certain deceases like athracnose but I not that scientific. I ask questions , but without a plant doctor in the house, often the malady will go unidentified. We can just throw some treatments at it and hope something will work.