12 N. J. Agricultural Experiment Stations Bulletin 356 



The early appearance of the disease on some trees in these young 

 orchards led us to suspect that they were affected with yellows in the 

 nursery. A complaint also from a Burlington County peach grower 

 as to the behavior of his young peach trees was followed by an in- 

 vestigation by the horticulturist and advanced symptoms of yellows 

 were found developing in an orchard within 4 months after planting. 

 Further investigations indicated that these trees must have been dis- 

 eased before leaving the nursery. Since that time many other cases 

 of yellows and little peach have been observed in trees soon after 



Fig. 5 — Healthy Fruit at Left. Premature Red-spotter Fruit at Right 



planting, and in nursery stock, some of which were less than one 

 year old from time of budding. The disease was also found to be 

 much more prevalent in certain blocks of trees in orchards than in 

 other blocks of the same varieties and ages. Further investigations 

 usually brought out the fact that these blocks of good and poor trees 

 were from different sources. It was also learned that both nursery- 

 men and orchardists occasionally selected bud wood from trees which 

 were apparently vigorous and healthy, but which in reality were 

 slightly diseased. This was to be expected since very little was 

 known about early or preliminary symptoms. One grower budded 

 three hundred seedlings from a supposedly early variety of Elberta 

 which later died with yellows. All of these trees developed yellows 

 the first year of bearing. 



