SMALL FRUITS 149 



The disease usually appears before blossoming, and by 

 sapping the vigor of the vine prevents fruiting. No treat- 

 ment is known. 



Sclerotiniose (Sclerotinia Oxycocci Wor.). — Just as the 

 plants begin to blossom the tips of green shoots first 

 show this disease by withering. Then a thin, soft, white 

 moldlike outgrowth appears upon the stem and leaves. 

 From here the spores spread to the open blossoms and 

 infect the young fruit. No further evidence of the disease 

 is seen until the berry is nearly mature, when the affected 

 berries are found to be full of a cottonlike growth, the 

 fungous mycelium. At harvest time such berries show a 

 grayish, wrinkled spot, and later the whole berry becomes 

 gray, shriveled, and often spotted with dark brown masses 

 which break through the skin. Such berries carry the 

 disease over winter. 



The destruction by fire of all diseased fruit will lessen 

 the evil in succeeding seasons. 



Gall {Synchytrium Vaccinii Thomas). — The cranberry 

 gall though not widely known has been serious in some 

 bogs, and on account of its rapid spread may become of 

 much import in any bog to which it gains entrance. The 

 first collection of the disease in America was by Halsted ' 

 in New Jersey in 1886. 



It is found upon the leaves, stems, flowers, and fruit as 

 small, 0.8-1 mm., red galls which occur in such abundance 

 upon the affected part as to cause marked distortion. 



The disease is known to recur year after year, resulting 

 in almost complete loss of the crop in infected portions of 

 the bogs. 



' Halsted, B. D., N.J. Agr. Exp. Sta. Bui. 64, December, 1889. 



