Nakatumisel nooremad lehed vajuvad äkki longu, leherootsude ülaosa mustendab, seejärel kahjustatud lehed närtsivad ja surevad, kogu taim või võrse hävib järgmisel päeval.
the fungal disease
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Infection can occur through the leaves, causing leaf spots. Affected leaves may then shrivel and the leaf stalks turn black. Leaf infection is followed by wilting of the stems, infection can also occur directly through stems. Freshly affected stems show black discolouration of tissue when split open.
