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Whats up with my cucumber leaves?

ChriscoreChriscore Posts: 155
in Fruit & veg
A few weeks ago the leaves of my F1 passandra cucumbers started turning a blotchy yellow then brown, over time it has progressed to the rest of the leaves, sometimes the cucumbers are yellow also. At first i thought it was a mildew problem but i haven't found any signs of fungus on the leaves. Someone suggested it could be a magnesium deficiency so i have tried spraying the leaves with an epsom salt solution but it still seems to be progressing. I know its late in the season so at this point can't complain, its produced well but still i would like to know what's going on. I currently feed them once a week with tomorite.

Posts

  • tui34tui34 Posts: 3,493
    Hello!  
    It looks like odium - you could try some sulphur powder.  But I think it's a bit late in the season (if they are outdoors).  It comes from watering the leaves.  Most plants prefer to be watered at the base.  

    I would imagine there will be someone more expert that will be able to advise you for next year's crop.
    A good hoeing is worth two waterings.

  • Pete.8Pete.8 Posts: 11,340
    By this time of year the leaves on my cucumber start to look like yours too.

    A couple of possibilities-
    The leaves are working flat out to produce energy for the plant and they get worn out eventually and start to break down.
    I'd guess that new leaves are not affected?
    When you say some of the cucumbers are yellow too - are these good size fruits, or small fruits that turn yellow and drop off?

    Another possibility is rot somewhere on the main stem that disrupts the flow of nutrients to the leaves, so they start to turn yellow and any fruits above the rot don't form properly and drop off.

    I've had 118 fruits from my mini-munch plant so far this year and it's still producing - so I can't complain

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • floraliesfloralies Posts: 2,718
    The lower older leaves on my cucumber plants are looking like this but new ones are ok. They tend to do this as the season goes on. Still growing new shoots despite pruning them back. I have lost count of the number of cucumbers this year, will limit myself to one plant next year!
  • ChriscoreChriscore Posts: 155
    Pete.8 said:
    By this time of year the leaves on my cucumber start to look like yours too.

    A couple of possibilities-
    The leaves are working flat out to produce energy for the plant and they get worn out eventually and start to break down.
    I'd guess that new leaves are not affected?
    When you say some of the cucumbers are yellow too - are these good size fruits, or small fruits that turn yellow and drop off?

    Another possibility is rot somewhere on the main stem that disrupts the flow of nutrients to the leaves, so they start to turn yellow and any fruits above the rot don't form properly and drop off.

    I've had 118 fruits from my mini-munch plant so far this year and it's still producing - so I can't complain
    Its full size cucumbers that turn yellow. Still getting some green ones though. At this point most the leaves look like this including the newer ones.
  • ChriscoreChriscore Posts: 155
    tui34 said:
    Hello!  
    It looks like odium - you could try some sulphur powder.  But I think it's a bit late in the season (if they are outdoors).  It comes from watering the leaves.  Most plants prefer to be watered at the base.  

    I would imagine there will be someone more expert that will be able to advise you for next year's crop.
    Hmm seems unlikey, i only water at the base and they are in a greenhouse, but thanks for the response.
  • Pete.8Pete.8 Posts: 11,340
    Other than checking if there's some rot or a split somewhere on the main stem I can't think what else it may be..

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • DovefromaboveDovefromabove Posts: 88,147
    Chriscore said:
    Pete.8 said:
    By this time of year the leaves on my cucumber start to look like yours too.

    A couple of possibilities-
    The leaves are working flat out to produce energy for the plant and they get worn out eventually and start to break down.
    I'd guess that new leaves are not affected?
    When you say some of the cucumbers are yellow too - are these good size fruits, or small fruits that turn yellow and drop off?

    Another possibility is rot somewhere on the main stem that disrupts the flow of nutrients to the leaves, so they start to turn yellow and any fruits above the rot don't form properly and drop off.

    I've had 118 fruits from my mini-munch plant so far this year and it's still producing - so I can't complain
    Its full size cucumbers that turn yellow. Still getting some green ones though. At this point most the leaves look like this including the newer ones.
    They do turn yellow as they ripen ... it's usual to pick them before they reach that stage. 

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • ChriscoreChriscore Posts: 155
    Pete.8 said:
    Other than checking if there's some rot or a split somewhere on the main stem I can't think what else it may be..
    Thanks, i will have a good look to see what i can find.
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