Left, normal leaf of Nicotiana debneyi. Right, vein clearing caused in N. debneyi by <i>Potato virus S</i> (PVS), genus <i>Carlavirus</i>
D. J. MacLeod. Original by R. H. Bagnall
File:Mosaic and streak viruses of the potato (IA mosaicstreakviru00macl).pdf (extracted using Greenshot SW, grayscale and enhanced using MS Office Picture Manager)