148 DISEASES OF ECONOMIC PLANTS 



feet upon the berry very similar to that of the scald 

 fungus appears first as small, light-colored, soft spots, which 

 soon destroy the whole berry. Later small, dark-colored 

 blotches show under the skin, but no pycnidia appear. 

 The disease is found in New Jersey, West Virginia, Mis- 

 sissippi, Wisconsin, and Nova Scotia. In importance it is 

 the second cranberry disease. 



The treatment suggested for the scald is also effective 

 against this rot. 



Anthracnose (Glomerella rufmnaculans (Berk.) Spaul. 

 & von Schrenk; Vaccinii Shear). — This is less injurious 

 than the rot or scald in New Jersey, but is more common 

 in Massachusetts and New England. The treatments 

 already suggested apply. 



The three diseases just considered cannot well be dis- 

 tinguished except by microscopic examination. In some 

 cases the berry is soft and light colored, but if the fungus 

 develops slowly, the sick portion is not so soft. To 

 control them the water supply should be regulated so as 

 to avoid great fluctuations during the growing season. 

 Too little water is more to be avoided than too much. 

 Vines dead from disease should be pulled and burned. 

 Bordeaux mixture, at fourteen-day intervals, as suggested 

 above, is recommended. 



Hypertrophy (Exobasidium Oxy cocci Rostr.). — Hyper- 

 trophy is known only in Massachusetts, where in 1906 it 

 did considerable damage in some bogs. 



In this disease the buds in the leaf axils, which normally 

 remain dormant, grow out into short shoots bearing swollen 

 enlarged leaves of pink or light rose color. This character 

 has given rise to the name " false blossoms." 



