Nutrient deficiency or pest/disease?

[Marctee]

I have 150 Regent vines planted in mid-May. Most very healthy save for this odd one showing browning along the leaf edges as it emerges from the grow tube. Any suggestions on what it might be?


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[Marctee]

one more pic


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[GreginND]

It's hard to say. Browning in the edge only would indicate stress maybe not enough water? One of the pictures looks a little more splotchy. Brown splotches could be black rot or other fungal or bacterial diseases.


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[Pat57]

That would be my guess, I've seen it before on lots of plants when they start to drought and then recover, the edges will get crisp and brown, but the remaining leaf will be fine.