or rotting of the lower portion of the stem (C.
in seedbeds, seedlings show yellowing, especially, of the lower leaves.
Later on, seedlings wilt and die.
in the field, plants show a blackening of the vine around soil level,
extending upwards and downwards. Lower portion of the vine rots.
Disintegration of the root system occurs. Affected stems may be girdled and
the plant dies.
in storage, roots start rotting from the end that has been attached to
the mother root. Affected roots develop a firm, dry, dark brown decay that
can cover a large portion of the root.
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