Problem with cucumber?

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Iecabus

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Problem with cucumber?
« on: June 13, 2019, 08:00 »
Hi, I'm not sure if I have a problem with my young cucumber plants. They are starting to develop yellow spotting on the leaves. Does anybody have an idea what the issue is? Thanks.
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mumofstig

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Re: Problem with cucumber?
« Reply #1 on: June 13, 2019, 09:07 »
Have you had a look for aphids on the undersides of the leaves? sometimes the leaves look crispy if the aphids have now moved elsewhere, so may have caused the damage even if no longer there. Squish or spray with soapy water and keep an eye on them ;)
If the spots start to get bigger and turn greyish, or white, underneath then it could be downy mildew - in which case there isn't anything to do other than remove the plant before it spreads.
If they just stay spotted then it could be mosaic virus - still nothing you can do for these apart from remove them as you risk spreading the virus, and any fruit would be bitter.
I hope it's just aphids causing your damage, before the rain, there were a lot of them this Spring :(

Lesley x
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JayG

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Re: Problem with cucumber?
« Reply #2 on: June 13, 2019, 14:33 »
Red spider mite is another possibility (they will be on the underside of the leaves but you need very good eyesight or a magnifying glass to see them.)
Sow your seeds, plant your plants. What's the difference? A couple of weeks or more when answering possible queries!

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Iecabus

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Re: Problem with cucumber?
« Reply #3 on: June 13, 2019, 14:54 »
Have you had a look for aphids on the undersides of the leaves? sometimes the leaves look crispy if the aphids have now moved elsewhere, so may have caused the damage even if no longer there. Squish or spray with soapy water and keep an eye on them ;)
If the spots start to get bigger and turn greyish, or white, underneath then it could be downy mildew - in which case there isn't anything to do other than remove the plant before it spreads.
If they just stay spotted then it could be mosaic virus - still nothing you can do for these apart from remove them as you risk spreading the virus, and any fruit would be bitter.
I hope it's just aphids causing your damage, before the rain, there were a lot of them this Spring :(
Interesting, I will look in detail later. I have not noticed any aphids but that does not mean they are not there. Thanks for the info.

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Iecabus

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Re: Problem with cucumber?
« Reply #4 on: June 13, 2019, 14:55 »
Red spider mite is another possibility (they will be on the underside of the leaves but you need very good eyesight or a magnifying glass to see them.)
I will look for the little spiders later, thanks for the info.
« Last Edit: June 13, 2019, 14:57 by Iecabus »



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