Noticed this a few weeks ago but didn't really know what it was until I googled it. Spreads from plant to plant and affects the leaves only. Anyone have any success battling this? It mentioned increasing air flow and treating with an anti fungal. Any advice would be appreciated!

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It happens every year with mine. I just let it go knowing that the leaves will all fall off in a couple of months.

Yup what he said. every year. The cycle of life!

I wish it would hold off until closer to leaf drop, though.

There are some systemic fungicides, but, they need to be done earlier to prevent it. I hate to put things like that in the soil, though.