Looks like some sort of bacterial infection from here. Contact your Co Extension to see what they are getting this season and if there are any varieties that are resisting the bacterium this year.

Dan

I would suggest a fungal root rot. If bacterial, often a soft rot and quite smelly.

I'mma go with jean on this one and say fungal. My first guess would be Sclerotinia.

There is no smell what so ever. I should also mention it is very hard & it is not affecting any other plant that I can see. I have beans, tomatoes, melons, roses, peppers, squash, asparagus, eggplant, etc, etc, etc.
I may spray some bayer disease control tomorrow to see if I can stop it.
thanks

I can go with a Sclerotinia now that I think about it.

Dan