136 



MINNESOTA STATE HORTICULTURAL SOCIETY. 



long or short— were it shorter than it is the clusters would neces- 

 sarily crowd each other. 



"During- the winter of '85-86 a vine was left tied to the upper wire, 

 and in the spring appeared alive to the terminal buds and set fruit 

 throughout. 



"Your committee would say that this vine now has 68 clusters on 

 it, probably weighing 25 pounds. One of the young vines (second 

 year's fruiting) shows 48 clusters, probably weighing 16 pounds, and 

 a larger average than those shown at the fair. It appears to ripen 

 with Concord, hold its fruit firmly, seems rich in saccharine, and 

 has every appearance of being a long keeper and excellent ship- 

 per," 



ANTHRACNOSE OF THE RASPBERRY. 



( Gloeosporium venetum, Speg.) 



R. S. MACKINTOSH, ST. ANTHONY PARK. 



In considering the subject of anthracnose, we have to note the 

 fact that it is a disease that has come upon us within recent years; 

 not more than fourteen years ago it was first described briefly by 

 Professor T. J. Burrell in the Agricultural Review, November, 1882. 

 Probably the first detailed description was in the report of the De- 

 partment of Agriculture in 1887, in which it states the territory over 



which it prevails. The following is part 

 of the report that appeared in 1887 from 

 the Department of Agriculture : 



"That the disease is directly due to the 

 action of a fungus which is a true para- 

 site there can be no question. 



"On the Canes.— The fungus attacks 

 both fruiting and non-fruiting canes or 

 suckers. On the latter it usuallj' appears 

 first near the base, producing- small pur- 

 ple spots, that are variously scattered 

 around the cane. The spots, first formed, 

 rapidly increase in size, and as the 

 fungus develops the center of each be- 

 comes graj'ish white in color. Surround- 

 ing each spot is a slightly raised, dark 

 purple border, separating the health)^ 

 Raspberry cane affectud with from the diseased tissues. The course 

 anthracnose (cane rust). of development is from the lower por- 

 (From Minnesota Experiment tion of the canes upwards, SO that at any 

 Station Bulletin 89.) time during the growing Season the tip of 



the cane shows only the minute purple spots, or early manifesta- 

 tions of the disease, while towards its base are found the older and 

 larger spots. In an advanced stage of the disease, the spots coalesce, 

 or run together, and appear as irregular blotches, which are fre- 

 quently an inch and a half long and sometimes completely encircle 

 the cane. The direct damage in the tissue rarely extends to the 

 pith; the greatest injurj' is cotilined to the cambium laj^er, or the 



