Mottled or patchy yellowing, necrotic spots and droopiness of mature
Deformities, puckering and holes in young leaves.
Blackening of root cortical tissue just under the skin.
one of the following is indicative; rarely all are present)
chlorosis and drooping of mature
necrotic spots on mid and older leaves,
followed by yellowing of the area around the spots, then spreading necrosis.
leaves may show various deformities including puckering,
missing sections of blade and irregular holes.
upper surface of young unexpanded leaves may have a silvery appearance.
storage roots with patches of brown or black in the subsurface layer, at
harvest or after a short period of storage.
- Occurs in calcareous (alkaline) soils, acidic sandy soils, organic
with other symptoms
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