CHERRY DISEASES 181 
of Germany because of the severe injury inflicted on cherry 
trees. In the United States both the wild and cultivated 
cherries are affected. The reader is referred to Peach for 
a description of the symptoms, cause and control, page 300. 
REFERENCE 
Wormald, H. The Cytospora disease of the cherry. Southeast Agr. 
Col. Wye Journ. 1912: 367-380. 1914. 
BacTERIAL-GUMMOSIS 
Caused by Bacterium Cerasi (Griffin) = Pseudomonas Cerasus Griffin 
The phenomenon of gum-flow is common to stone and citrus 
fruit-trees. It results from stimulation produced by foreign 
factors of one kind or another. The flow of gum, gumming, 
or gummosis, is not a disease, although in many cases it is a 
sign of disease. In other cases it is an indication of injury. 
The term gummosis, then, is used broadly to designate any 
disease or injury which is accompanied by a gumming, or a 
flow of gum. The remarks presented here refer in most cases 
to a particular bacterial disease of the cherry, plum, peach and 
apricot which is commonly accompanied by gum-flow. So far 
as is known at present this disease, called bacterial-gummosis 
of cherry, occurs only in western Oregon and Washington. 
Time may show, however, that this bacterial-gummosis prevails 
in other sections of the United States. It is to be noted in 
this connection that the flow of gum in the cherry in the states 
already referred to is frequently caused by factors other than 
the bacteria under consideration. In the Pacific Northwest 
the disease is usually called cherry-gummosis, but the common 
designation bacterial-gummosis is preferable in that it is more 
specific. 
Among the plants affected by this disease the cherry is most 
