Stem end rot

Symptoms

• Superficial or deep necrotic tissue at the stem end
• Vascular bundle ring can discolour brown
• Damage can eventually develop into stem end rot

Possible causes

• Black dot (Colletotrichum coccodes): typical symptom is part of the stolon still attached to the stem end with the characteristic microsclerotia
• Certain Fusarium species


• Haulm destruction at very high temperatures
• Rapid haulm destruction ‘plant shock’