Broad beans - blackened leaves and stems?

Hi there.

Looking for some expert advice.
In November I have sown some acquadulce claudia in pots, and left them in unheated miny greenhouses.
They did quite well until last week or so, when the slugs found a way in.

Aside of that, several have blackened leaves and stems. With some it seems to have affected only the stem in the soil, essentially killing the plant, while for others it is only the tips.
For the moment, I isolated the affected plants and planted out the rest (hoping the slugs give them a rest).

Reading though previous thread, @JWK suggested it might be due to cold. It has been snowing briefly a few weeks ago, and I did clear some from the top of the greenhouses at the time. So it might be that?

 

@Aldo Not sure where you are in the country, but mine have been planted out since December and are growing well, so yours should be fine outside. Aquadulce don't suffer from many problems' did they get too wet?

 

They might have Nigel, that greenhouses can get a bit damp unless opened regularly, which I missed to..
I took a few pictures, but something happened to the files. I will take more tomorrow and post them.

 

@NigelJ here are a few pictures..
The plants which turned black at the stem are for the skip I guess, but perhaps those which only suffered leaf damage might survive?

 

Mine went like that last year, but much later on. This years are ok at the moment, I've just weeded around them.

 

Thanks.
Did yours recover?
Also, whatever it is, did it seem to affect other plants nearby at all?
I am planning to keep them three months and the swap them with tomatoes and other species later on, so if it can spread I should probably just ditch them.

 

They definitely just got worse, very black and shrivelled so got put in green waste bin. The runner beans were quite nearby and I don't remember them going black, but they didn't do very well at all last year - but nor did other crops...butternut squash, which usually take over their bed and surrounding paths. If I'm honest....I probably didn't water them enough. This years are in a different bed from last years.

 

I would say its a fungal problem at the roots .... may have been kept too wet

 

Thanks everyone, much appreciated!

I am keeping them outside now, I hope they improve.

@JJ28 thanks, if it did appear to spread I think I will take my chance planting the affected ones out, separated from the others.