384 MANUAL OF FRUIT DISEASES 



REFERENCES ON PLUM SCAB 



Craig, J. A destructive disease affecting native plums. Canada Exp. 



Farms Repts. 1892 : 101. 1893. 

 Pammel, L. H. New fungous diseases of Iowa. Plum scab or black 



spot. Journ. Myc. 7 : 99-101. 1892^ 

 Jarvis, T. D. Fungus diseases affecting fruit trees. Plum scab. 



Ontario Agr. Dept. Bui. 158 : 27. 1907. 



ROSETTE 

 Cause not known 



This disease is better known on the peach. Many varieties 

 of plums are said to exhibit the rosette disease, including budded 

 trees and seedlings, cultivated and wild varieties. It has been 

 noted particularly on the Kelsey and Botan varieties in Georgia. 

 With reference to the latter variety, the name has been used 

 synonymously with the Abundance, Berckmans, Red June and 

 Willard, so that it is uncertain which variety is in question. See 

 fuller discussion of rosette under Peach, page 292. 



YELLOWS 



Cause unknown 



This trouble is characterized by the production of wiry 

 yellow shoots as in peach-yellows. The disease is supposedly 

 identical on both the plum and peach, but is by far the more 

 common on the latter. It has been found on Japanese plums 

 and particularly on the variety Abundance. See more detailed 

 discussion under Peach, page 283. 



LITTLE-PLUM 



Cause unknown 



This disease is better known as a peach trouble, but it is said 

 to be quite as common to plums as to peaches in some parts of 



