Greenhouse cucumber plants in greenhouse (hydroponics) with normal growth and development have yellow veins on well-developed leaves. What can be the reason: virus or physiological disorder?
Dear Alex Ignatov
Plants displaying Chlorosis in new growth leaves can be recovered with the use of iron sulfate solution which gives off enough free iron to give the plant what it needs. In the case of cucumbers, not a whole lot as having too much iron can bind other nutrients. Chlorosis can, in plants like blueberries be an indicator of both magnesium and iron lack, the acid soil they love harbors bacteria that release these elements from the soil particles.
In older leaves, chlorosis is an indication that the leaf is spent and occurs as sugars and starches build-up that the aging leaf cannot move to the plant. These being older leaves, probably are a good indicator that a transplant into a pot with healthy soil is more likely to be the ultimate cure.
It's more like other than any nutritional disorder and not a physiological disorder either . ..
Ladan Ajdanian Anoop Kumar Srivastava Thank you! I had experience with iron/magnesium deficiency of different type (like on picture) - veins stay green, leaf mesophyll turns yellow.
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