Is this a fugus, disease or insect problem?

Question

I am getting this on all my black eyed pea plants. see photo. i have used copper spray which didn’t do any good. just started using Neem Oil.

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Answer 1

Hard to tell from the photo, so here are links to a couple articles that go into detail about the
diseases that can affect this plant:
https://www.gardeningknowhow.com/edible/vegetables/black-eyed-peas/cowpea-seedling-diseases.htm
https://www.gardeningknowhow.com/edible/vegetables/black-eyed-peas/southern-peas-with-blight.htm