I don't know what that is, but it looks very much like what I had with my first three plantings of beans this year. Because the weather was terrible, cold and wet and then way too hot, I just figured I had bad luck due to that. I tilled under all three plantings and now have some coming up and looking OK. I planted pole beans about the same time as the last of those three bush bean disasters and they are looking pretty good, but are just now getting flowers and hopefully setting beans. If, and I say again if, you think it may be a fungal disease, you might try Daconil or one of the other anti-fungal treatments. If it is a bacterial or viral disease I don't know what you can do about it except hope they grow out of it.
I had terrible luck last year with beans, and they also looked similar to yours. Late in the summer I planted another batch and they did very well. If it was a disease, possible whatever insect vector spread it may have been gone later in the summer. I plan to have enough seed that I can put in more beans for a late crop this year, too, but I am presently hopeful about the ones coming in now. Last year the Japanese beetles feasted on my pole beans. It is always something.
Another thought....you didn't fertilize them, did you? Beans don't need or want extra nitrogen.
Chuck