Why Do My Fresno Chili Plants Have Black Streaks On Stems

Question

What can I do about treating the problem?

Answer 1

It sounds like your plants may have contracted a fungus. Here are two articles that
should help:
https://www.gardeningknowhow.com/edible/vegetables/pepper/pepper-problems.htm
https://www.gardeningknowhow.com/edible/vegetables/pepper/black-stems-on-pepper-plants.htm
If they have begun to wilt, this article will help: https://www.gardeningknowhow.com/edible/vegetables/pepper/pepper-wilt-on-plants.htm