Gray leaf spot?

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Hi, first time poster. I have learned so much from the collective knowledge here--thank you all!

I was hoping someone might be able to assist me in diagnosing these leaf spots that have plagued my plants the last couple years. They cropped up two years ago after several weeks of heavy rain, something not too common in the usually dry area of Southern California where I live (Inland Empire--zone 10, I believe). They start out as these brownish-gray blistery areas on the lower leaves, which eventually turn yellow (the leaves) then drop off. Fruit production slows or halts, though the spots don't seem to appear on any other parts of the plant. Any remaining fruit becomes sun-scalded from the increasing defoliation that spreads upward. The leaves don't appear to be deformed in any way as far as wilt or curling.



Weekly spraying with Ortho Garden Disease Control seems to keep it at bay, though this year the spots appeared earlier on this one plant (Nyagous), and impending rain has me a bit nervous

Thanks for any advice.

Suzanne











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