112 Diseases of Economic Plants 



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, Mississippi, Wisconsin, 

 and Nova Scotia. In importance it is the second cranberry 

 disease. 



The treatment suggested for scald is also effective against 

 this rot. 



Anthracnose {Glomerella cingulata var. vaccinii Sh.). — 

 This rot is less injurious in New Jersey than scald, but is 

 more common in Massachusetts and New England. 



The three diseases just considered cannot well be dis- 

 tinguished except by microscopic examination. In some 

 cases the berry becomes soft and light-colored, but if the 

 fungus develops slowly, the diseased 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. 



End-rot ^-"' ^^"^ (Fusicoccum putrefadens Sh.). — This occurs 

 in all cranberry sections of the United States, starting at 

 either end of the fruit and causing softening. Bordeaux 

 mixture, 4-3-50, with adhesive, applied four tunes, (1) before 

 blossoming, (2) as soon as most of the fruit is set, (3) ten 

 days later, (4) when fruit is three-fourths grown, is effective. 



Hypertrophy {Exohasidiuni oxycocci 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." 



Wilt (Sclerotinia oxycocci Wor.). — As the plants begin to 

 blossom the tips of green shoots wither. Then a thin, soft, 

 white moldlike outgrowth appears upon the stem and leaves. 



