stem destroyed and leaf yellowish

Cucumber    india

Please see the attached images of my cucumber plants suffering from disease. What is the disease and how to control it.

Posted by: ramprasad (2 points) ramprasad
Posted: February 21, 2016


The disease on your cucumber plant is downy mildew caused by Pseudoperonospora cubensis, a fungal disease.

1. Reduce moisture on plant canopy.
2. Keep the field free from weeds.
3. In future grow available resistant variety.
4. Spray liquid copper fungicide to control disease.

Posted by: Dr. Ravishankar Narayana (11 points) Dr. Ravishankar Narayana
Posted: February 22, 2016

I also was inclined to think it was downy mildew. But I would like to see a closer up image to confirm this. It should have a whitish color. It should also come off in your fingers if you wipe it.

To me there is a possibility that this is a physiological stress. Upload additional images please.

Also, have conditions been wet there a lot?

Posted by: David Hughes (54 points) David Hughes
Posted: February 23, 2016

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