What is this mold/fungus? Is it treatable?

Hi all,

I noticed on one of my outdoor plants I got some brown mold or fungus looking stuff as well as some yellow/white clumpy stuff? What is this and is it treatable and preventable in the future.As you can tell the plant is in flower so I’mnot sure what to treat this with.

some of the white flaky stuff on the leaves is from a mild/water mixture I used to treat some powdery mildew I was getting earlier on the plant.
 

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