Purple hull pea pods stunted

Question

What might be causing some of my purple hull pea pods to be stunted? Some pods are not growing to full length but are maturing.

Answer 1

Mosaic virus can affect the plants and cause the pods to not form normally or stunted as you describe.
Here are a couple of links, the article about cucumber mosaic would apply the same to your peas.

https://www.gardeningknowhow.com/edible/vegetables/black-eyed-peas/growing-black-eyed-peas.htm
https://www.gardeningknowhow.com/edible/vegetables/cucumber/cucumber-mosaic-virus.htm