384 MANUAL OF FRUIT DISEASES 
REFERENCES ON PiuM 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. Mye. 7:99-101. 1892. 
Jarvis, T. D. Fungus diseases affecting fruit trees. Plum scab. 
Ontario Agr. Dept. Bul. 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-PLumM 
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 
