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Broad bean problem

• Message 1. 

  Posted by 7magpies (U8108459) on Wednesday, 15th June 2011

  Today's problem (I seem to find a new one every day at the moment!): some of my broad beans have a coppery discolouration that begins on the leaf veins and spreads to the whole leaf, especailly the underside, after which they begin to wilt, and the affected plants are slow to set beans.
  
  I really don't think it's chocolate spot, because I've seen that before, and none of the leaves have that freckly appearance at any stage.
  
  It does occur most where the beans have been bundled together since I started supporting them with sticks and string, so it could well be some sort of fungus that is thriving in the damp, crowded places, but I can't find any information about it.
  
  Any ideas? would a spray with Bordeaux mix help?

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• Message 2

  , in reply to message 1.

  Posted by lottiebeans (U12886223) on Thursday, 16th June 2011

  Mine have a similar discolouration, a sort of rust colour on the leaves and stems of some of them. They are also being attacked badly by blackfly, but there are loads of ladybirds about so i'm hoping they will deal with this. I was late getting them planted and now they don't look too good at all. Have to say I'm not expecting a great crop this year. Anyone know of a remedy so that at least I get some sort of crop?

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• Message 3

  , in reply to message 2.

  Posted by 7magpies (U8108459) on Thursday, 16th June 2011

  I'm feeling quite smug about the blackfly, because as soon as I saw the first signs (a couple of weeks ago) I nipped out all the leading shoots. It really does work - I've only seen one or two more shoots with a few blackfly on since then, and I nipped them out too.
  So I don't think the backfly are implicated in my case.

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• Message 4

  , in reply to message 3.

  Posted by youngandallotmenting (U14434252) on Thursday, 16th June 2011

  Sounds like Broad bean rust. Fungal diease and can be as you said caused by not enough air flow between the plants. I am a bit vague from here...Don't think there is a treatment for rust but saying that I don't think it badly affects the crop...?
  
  Bit vague but its a start at least!

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• Message 5

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  Posted by Papa Nopsis (U14479902) on Thursday, 16th June 2011

  Why worry about that.; It's the beans you want!
  
  You're not going to eat the leaves at this late stage,
  although the tips are good in early May.
  
  You can make progressive pickings of broad beans
  by weeding progressively too.
  By the time the beans are over so is the weeding!
  
  Don't worry about the pods or the leaves; they will be ok!

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• Message 6

  , in reply to message 5.

  Posted by Papa Nopsis (U14479902) on Sunday, 19th June 2011

  Wait until they have got a sun tan and then pick. The aphids like them best when they have got a sun tan so that is another way of telling when to pick; when a slug has a go, and finds he does not like the bean, that is yet another time to pick. slugs know what is good for us but not good for them!
  
  Talking about eating the toppings, earlier on in the life cycle of the plant, i don't think I would bother with the leaves NOW since the known toxins from the plant AFTER pulling the beans off, rise to the tips of the plant leaves to discourage
  vegetable predators, rabbits, humans, deer and so on from eating them.
  
  Whereas taking the toppings for spinach type food early on merely forces a little but more goodness in to the beans. I don't know whether there is much tannin in the bean itself, once it is ready for picking. Tannin is what does the discouraging. It may be that humans are not put off the beans, even though they are not attractive to other animals.

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