These are pink fir apple taters in tubs.
Some of the new leaves have got dark grey patches near the stem - only near the stem like in the photo, and are a bit curled. Hoping it's not blackleg.
The grey is mostly on one plant, on recent leaves.
Would appreciate some info, thanks.
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Jimmy Widdle
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Looks fungal. I'd spray for Black Spot immediately. – Yosef Baskin Jul 07 '23 at 17:48
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The funny thing is it's all at the base of the stem on recent growth. I haven't seen a picture that looks like that. Maybe leaf roll virus? Zebra chip, purple top? – Jimmy Widdle Jul 08 '23 at 10:51
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@JimmyWiddle - have you tried Googling "potato blight"? – Peter4075 Jul 08 '23 at 18:38
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What would be a good fungicide? – Jimmy Widdle Jul 09 '23 at 14:20