Potato leaf roll virus

PLRV, leaf roll

Symptoms: Primary infection

• Symptoms visible at the top of the plant
• Leaves turn inward, becoming light yellow, sometimes with a red border

Symptoms: Secondary infection

• Symptoms visible throughout the whole plant
• Leaves turn inward, becoming light yellow, sometimes with a red border (particularly the older leaves)
• Young leaves are usually light yellow at the top of the plant
• Thicker, harder and cracking leaves

Infection and spread

• Mainly from the peach-potato aphid (Myzus persicae)
• A persistent virus

Possible confusion with

• Top roll (generally more widespread throughout a field)
• M-virus (PVM)