Phoma eupyrena

Phoma eupyrena

Symptoms

• Only visible on tubers during storage
• Initially a superficial dark coloured dry rot
• Later develops as a deep penetrating dry rot in the tuber
• A white discolouration is visible on the outline of the diseased tissue

Infection and spread

• Usually found on senescing leaves
• Rain or irrigation washes the spores to the tubers
• Disease enters via harvesting damage

Possible confusion with

• Gangrene (Phoma exigua)