Ask a Question forum: Cucumber problems

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Los Angeles, CA
sheepishsheep
Aug 4, 2017 8:34 PM CST
Hello!

I'm growing beit alpha cucumbers in a planter in Los Angeles. I've planted them in EB Stone flower and vegetable planting mix and fertilized with EB Stone fertilizer. I've noticed a few gnat-like insects on them and what I think was powdery mildew (see first 2 images attached) 2 weeks ago. I spayed neem oil and removed the diseased leaves and the powdery mildew continued to spread to the new leaves. I applied a copper fungicide a few days ago and the powdery mildew seems to have resolved. However, now the new leaves coming in are stunted and yellow (see images). The insects are still there too (see last image). What could this be and what should I do next?

Thanks!
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[Last edited by sheepishsheep - Aug 4, 2017 8:35 PM (+)]
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Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
Aug 4, 2017 9:41 PM CST
Welcome!

I hate to say this but it looks like you are dealing with Cucumber Mosaic Virus.

The first leaf still looks like mildew.

I don't know what kind of insect that is. It looks like a fruit fly.
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Southeast OK (Zone 7b)
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KarenHolt
Aug 4, 2017 10:41 PM CST
These cukes are so young you could chunk them and start again. Cukes grow fast. Dump the dirt and plant some new seeds.
[Last edited by KarenHolt - Aug 4, 2017 10:42 PM (+)]
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Los Angeles, CA
sheepishsheep
Aug 5, 2017 12:46 AM CST
I'm also growing tomatoes, peppers, basil, cilantro, and strawberries nearby. It sounds like tomatoes and peppers can also be affected by this virus. What signs should I look for in them? Do you think they probably also have it?
Name: Philip
Anaheim, CA (Disneyland) (Zone 9b)
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pphanfx
Aug 5, 2017 1:21 AM CST
I'm getting exact same issue, plus leafminers, plus retarded looking bottle-shaped cucumbers, plus shutdown on 75-80% most likely due to the heatwave.. it's still going to get hotter over the weekend.. I'm just 30-45 minutes south of you my friend. I'm just gonna throw those in a salad and take the seeds. I have no idea how to fix it, it's driving me nuts.
Water your plants!
Southeast OK (Zone 7b)
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KarenHolt
Aug 5, 2017 7:42 AM CST
With mosaic virus you will have to get rid of infected plants. Chances are they have it too. You can wait and see or you can begin again. I don't think that should be a problem in your location but you would know better than me. If it were me, since time is not a factor, I'd start again.

For leaf miners, neem oil should work. If you are organic, someone else can help with that better than me.
Los Angeles, CA
sheepishsheep
Aug 5, 2017 3:51 PM CST
Thank you all for your advice. Here are a few pictures of my tomato and pepper plants. Do you think they are also affected by the same virus? Are strawberry, basil, and cilantro resistant to this virus?
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Name: Rita
North Shore, Long Island, NY
Zone 6B
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Newyorkrita
Aug 5, 2017 5:05 PM CST
sheepishsheep said:Thank you all for your advice. Here are a few pictures of my tomato and pepper plants. Do you think they are also affected by the same virus? Are strawberry, basil, and cilantro resistant to this virus?
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On these tomato and pepper plants I don't see much fungus or virus. I see what looks more like insect damage to me. Those plants need to be mulched and protected from the splashback from the soil.
Los Angeles, CA
sheepishsheep
Aug 18, 2017 10:14 AM CST
Does mulching help prevent insects? There are several flies in the area that I can't seem to get rid of using an insect spray for vegetable plants. I was reading that cedar mulch is a good choice for controlling insects. Do you agree? Any other recommendations on how to get rid of insects? Thank You!

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