Brown rust spots on green beans after picking

Question

I picked some green beans yesterday morning. I laid them on the grass in the shade while I finished working in the garden. I put them in a box, brought inside and after showering I put a towel on the shower floor and layer of newspaper. I spread them out so they’d stay cooler. When I got home from work and went to work them up,some had brown rusty color spots. (Mind you they were all green when I picked them)
What would cause this?
Also are all varieties of green beans round..because I have some flatter beans..may be bird egg!
I have them beside my green beans..must of some got mixed at the seed/feed store!! Lol

Answer 1

Beans do not keep very long after picking. You must wash and prepare them for cooking immediately, or store them very cool, such as a refrigerator and in a bag to preserve moisture. They were likely infected with rust fungus before they were picked, and the conditions in the bathroom were perfect for the mold to set in and propagate. If you need to store them for longer, then you will need to vacuum seal them and freeze them. Better yet, cook them and freeze them.

As far as bean shapes... There are round and flat varieties.