Risk factors

The development of PLRV infection results from the combination of different sources of infection:

• internal to the field (volunteers, seed tubers and weeds);
• external (nearby potato crops, home-gardens and weeds);
• flights of aphids during the growing season (related to climatic conditions and nearby crops);
• the level of control measures taken in seed potato production (roguing, crop management such as weed control, crop protection; haulm destruction or field and lot inspection);
• the susceptibility of the potato cultivar.