My beans started to have like a rusty spots on their leaves. What is it? Are they going to die?

I have a similar problem in my greenhouse and have just asked a question about minute black flies that obviously lay eggs and the maggots eat the roots.

Thank you, will have to do something about it. Or all my lovely french and runner beans will be gone.

I am sorry but I think rust on runners is terminal if it occurs early in the season. I don't know whether there is any chemical control but I don't think there is. I think it proliferates early in the season when conditions are suitable i.e. humid. Rust later in the season is more usual and not such a problem. However, you will not be able to grow runners in the same spot for at least a couple of years. Don't put diseased plants in the compost bin.

Thank you so much Louloubelle. At least I know what it is and how it affects the plants.

Oh Louloubelle could you just tell me, where does the rust come from then? From soil? Air born? Black fly? I am just trying to understand it.

Michaela I have had a reply about the flies I get in the greenhouse, they come from using compost with peat in so I shall try using peat free compost next year. If you have rust on your bean plants there is a spray but have forgotten what it is as we used to use it on our grapevine but not every one likes to use spray on their produce. I would pick the worst of the leaves off but you can't really do that if the plants are small.