Recent Studies on Peach Yellows and Little Peach 35 



fruit had been allowed to fall to the ground for two years in succes- 

 sion. The tree was in a corner of the orchard close to a woodland, 

 so that the soil under the tree became covered with leaves in the fall 

 and this probably favored the production of seedlings from both lots 

 of pits. 



Both new and one-year-old seedlings were transferred to nursery 

 rows at New Brunswick. These seedlings made a good growth, as 

 illustrated in figure 21, and remained in an apparently healthy condi- 

 tion until 1918, when they were removed to make room for other 

 stock. No disease, therefore, developed during the five years in the 

 nursery. 



Fig. 21 — Healthy Seedling Trees Secured From Under Ray Tree 

 Affected With Yellows at High Bridge, New Jersey 



While the pits from most seriously diseased trees fail to grow, in- 

 dividual trees are found with only slightly affected branches from 

 which a considerable number of pits will grow. This station has no 

 record, however, of a single diseased tree being produced in this 

 manner. All of our pits that have germinated have produced healthy 

 trees. 



Propagation with Buds from Diseased Trees 



In an effort to determine something further in regard to the period 

 of incubation and the appearance of distinctive symptoms of yellows, 



