Final diagnosis


Potato virus X (PVX)

Non-deforming mosaic symptom on potato leaves caused by a secondary infection of <i><b>Potato Virus X</i></b> (PVX)
Flat mosaic on potato foliage caused by <i><b>Potato Virus X</i></b> (PVX)
Interveinal mosaic symptom on potato leaflet caused by <i><b>Potato Virus X</i></b> (PVX), well marked here but usually less apparent, especially in sunny weather
Mosaic pattern with leaf deformation observed on some cultivars of potato in the case of a secondary infection of <i><b>Potato Virus X</i></b> (PVX)