General light green colour and sparse canopy,
compared with N-fertilized crop behind (J.
Yellowing, wilting and drying up of oldest leaves, and purple veins
on young leaves are common symptoms (J. Low).
overall pale, dull appearance and small leaf size.
establishment and ground cover.
older leaves may turn yellow and slightly wilted, then drop off.
increased purple pigmentation of young leaves, especially
veins, and sometimes apparent only on the undersurface.
with other symptoms
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