PLATE 2 
A. —(i) Healthy leaf from vine from same tuber as inoculated plant also grown in 
cage. (2) Mild mosaic leaf from Green Mountain plant inoculated with inoculum 
from mild mosaic Green Mountain in cage. 
B. —(1) Plant with leaf-rolling mosaic and spindling tuber, forming a curly-dwarf 
combination. (2) Leaf-rolling mosaic plant. Green Mountain variety. 
C. —(1) Leaf-rolling mosaic Green Mountain plant diseased as result of aphid inoc¬ 
ulation in preceding season from parent of plant in C, 2. (2) Curly-dwarf plant of 
Uncle Sam variety (Rural group). 
