PIRATE i 
A. —Two potted plants of the Green Mountain variety and sprouted seed pieces 
from the same corresponding tubers. On the left the sprouts of the seed piece are 
retarded in growth and show several brownish lesions, and the potted plant exhibits 
symptoms of extreme mosaic; on the right the seed piece has a sprout approximately 
normal, and the plant exhibits mild mosaic. 
B. —A potted plant with symptoms of extreme mosaic and sprouted seed piece 
from the same tuber. The sprout exhibits retarded growth though not as marked 
as in A. The seed tuber was from a parentage described as “healthy but adjacent to 
mosaic plants.” 
C. —A potted plant of the Green Mountain variety exhibiting symptoms of both 
leafroll and mosaic. Irregular brownish areas appeared in the leaves and on the 
stems, and premature defoliation occurred. 
