198 MANUAL OF FRUIT DISEASES 
Control. 
It'is advised that bogs be burned over in the early winter. 
In such an operation the other hosts already listed should 
be taken into account. It has been suggested that withholding 
the water and keeping the bogs dry in the winter and spring 
might keep the fungus in check. 
REFERENCES ON CRANBERRY-GALL 
Halsted, B. D. Cranberry gall fungus. New Jersey Agr. Exp. Sta. 
Rept. 10: 233-234. 1890. 
Halsted, B. D. The gall fungus. New Jersey Agr. Exp. Sta. Rept. 
11 : 332-334. 1891. 
Halsted, B. D. Some fungous diseases of the cranberry. I. The 
cranberry gall fungus. New Jersey Agr. Exp. Sta. Bul. 64: 4-16. 
1889. 
Shear, C. L. Cranberry diseases. Synchytrium Vaccinii Thomas. 
U.S. Agr. Dept. Plant Indus. Bur. Bul. 110: 37-88. 1907. 
Goff, E. S. Insects and diseases injurious to cranberries. The 
cranberry gall fungus. Wisconsin Agr. Exp. Sta. Bul. 35: 16. 
1893. 
HyYprerTROPHY 
Caused by Exobasidium Oxycocci Rostrup 
Hypertrophy, or false-blossoms, is erratic in its behavior. 
Some bogs are free from it, while in others every plant may be 
diseased. The variety Matthews seems especially susceptible. 
The disease is rather limited in its range, being known only 
in Massachusetts. In 1906 it was unusually severe in that 
state, destroying a large part of the crop in several bogs. Not 
only the production of fruit is prevented, but the vitality of 
the plant is exhausted. 
Symptoms. 
The fruit-bearing and vegetative shoots, runners, are af- 
fected. The disease appears usually in the middle of May or 
soon after the water is removed from the flooded bogs in the 
spring. The axillary leaf-buds, which ordinarily remain dor- 
