
Although not absolutely certain (see update), don't think this is disease. Concentric scorch marks indicate sun scorch caused by hot sunshine shining though rain drops (which act as a lens).
Never seen them so large before, so not ruling out disease. But normal leaf blotch does not have the scorch rings. Shall have to wait and see.

2 comments:
Actually, The sun shining through water drops and acting as a lens, is an old gardening myth that just won't die. The concentric rings you see is from Early Blight..a disease.
Thanks for the comment. I appreciate what you are saying and completely agree. Shortly after posting, I found a reference to fungal leaf spot which had an almost identical photo. I posted re this and placed a link ("see update") in this post. Sorry for any confusion.
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