Leaves of plants are cup-shaped and have yellow areas between veins. Is it Cucumber mosaic virus or something else?
Dear Alex,
from the photos I can say definitely that there is no CMV infection. However, these symptoms may be sourced from cucumber yellow virus disease,
causal agent Beet pseudo-yellows virus, particularly damaging in greenhouse and transmitted by whiteflies. Older leaves show chlorosis symptoms that resemble nutritional deficiency. Later, yellow areas turn into necrotic lesions. Symptoms can easily be confused with symptoms resulting from nutritional deficiencies (e.g., magnesium), insect feeding, poor growing conditions and premature aging. If there are whiteflies in your growing media, there is possibility of this virus. If there are no white flies, they can be caused by abiotic disorders such as mentioned above (nutritional deficiencies, poor growing conditions, water stress and premature aging).
From the photograph it seems that there is deficiency of any micronutrients may be iron.
From the photo I'm seeing most of the popular symptoms of Cucumber Mosaic Virus like mottling pattern on the leaves, ringsport on leaves, yelloeing of leaves leaf distortion and wrinkling and many more. Therefore, I am convince that it's Cucumber Mosaic Virus.
Iron deficiency should appear on young leaves which is not the case in some photos.
The symptoms seen could be related to CMV.
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