PVX persists in infected seed potatoes or volunteer potato plants. This virus is transmitted mechanically and by plant-to-plant contact.
Symptoms. PVX is usually symptomless, but may cause a mild mosaic symptom. Mixed infection with PVY may or may not cause more severe mosaic
symptoms (rugose mosaic). Plants expressing rugose mosaic symptoms are stunted and lack vigour. Yields are reduced drastically.
mottling (rugose mosaic).
infection of PVX and PVY
