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. 



Kept. 10 : 233-234. 1890. 

 Halsted, B. D. The gall fungus. New Jersey Agr. Exp. Sta. Kept. 



11 : 332-334. 1891. 

 Halsted, B. D. Some fungous diseases of the cranberry. I. The 



cranberry gall fungus. New Jersey Agr. Exp. Sta. Bui. 64 : 4-16. 



1889. 

 Shear, C. L. Cranberry diseases. Synchytrium Vaccinii Thomas. 



U. S. Agr. Dept. Plant Indus. Bur. Bui. 110 : 37-38. 1907. 

 Goff, E. S. Insects and diseases injurious to cranberries. The 



cranberry gall fungus. Wisconsin Agr. Exp. Sta. Bui. 35 : 16. 



1893. 



HYPERTROPHY 

 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- 



