I would suggest slug damage.

Go out at night with a flashlight to search for the beasts.

Ok I will try that. How about the yellow coloring? What is causing that?

Likely short of nitrogen fertilizer. But beans do well with minimal additions.

Perhaps low prevailing temperatures?

I have found the problem. I went out at night with a flashlight and found them everywhere.
http://i.imgur.com/BSxRtuT.jpg

I also found some fly like things
http://i.imgur.com/bKdpqbv.jpg

and some pill bugs.

What do you recommend for protection? I have read Diatomaceous earth, beer, and sluggo plus can solve my problems. What do you recommend? I like sluggo because it will also get rid of the pill bugs, but it is expensive.

Sluggo with spinosad has extra stuff to kill a lot of harmless soil critters. Stick to plain Sluggo which kills only the slugs and really works. I sprinkle it under leaves and around the perimeter of my garden. I've never had a problem with pillbugs. They digest the mulch I put down and never harm my plants. They are not insects, they are crustaceans. Slugs are the bad guys!

I just went out and purchased some Bayer Natria slug repellent (Iron Phosphate).

I will reply back with how it worked.