PVY

Symptoms: Y^C

• Necrosis in the tuber, around the eyes

Symptoms: Y^NTN

• Superficial necrotic circles or arches
• Necrosis is cinnamon pink and raised above the skin

Symptoms: Y^N, Y^O

• In most cases tubers appear normal

Infection and spread

• Particularly peach-potato aphid (Myzus persicae), but also Aphis nasturtii, Macrosiphum euphoribae, Brachycaudus helichrysi, Sitobion avenae
• Seed tubers
• Non-persistent virus