PLATE 3 
A. —A 6-year-old peach tree which developed a natural infection of rosette in the 
spring of 1920. Note the rosetted growth on the left in comparison with the apparently 
normal growth of two limbs on the right. During the summer of 1920 this tree 
developed symptoms of rosette in all parts. 
B. —^To the left, with a background, the Moorpark apricot shown in Plate 5, B, 
which was inoculated with peach rosette, Jime 19, 1920. Note the stimted growth 
6f this tree in the fall of 1921, in comparison with the healthy apricot tree, to the right,, 
without a background. 
