I'm trying to beat back a fungus problem in a shrub--I think it's
photinia. The top of the leaves have a washed-out, grayish
appearance. underneath is a sprinkling of brown spots. I'm thinking
this is a rust, but welcome other possibilities.

Anyway, assuming this is a fungal problem, what is the best way to
treat organically? I've heard cornmeal on soil, cornmeal soaked to
create a foliar spray, vinegar, baking soda, copper. Any of these
more likely to be successful? Any more gentle in case of contact with
client's baby?

TIA,
Keith
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