206 MANUAL OF FRUIT DISEASES 



Stewart, F. C., and Blodgett, F. H. A fruit-disease survey of the 

 Hudson Valley in 1899. Currant diseases. Leaf spot. New 

 York (Geneva) Agr. Exp. Sta. Bui. 167 : 291-292. 1899. 



Stone, R. E. The perfect stage of Septoria Ribis. Phytopath. 6: 

 109. 1916. 



ANTHRACNOSE 

 Caused by Pseudopeziza Ribis Klebahn 



This is a disease which appears to some extent every year, 

 and only occasionally does it become epiphytotic. In New 

 York it was serious in 1889 and 1901, and is one of the most 

 common fungous diseases of the currant in Oregon. The trouble 

 is known throughout the United States and Europe. It is 

 also reported from Asia and Australia. Its origin is unknown, 

 but the first mention of it in America comes from Connecticut, 

 having been found there on black currants in 1873. Subse- 

 quently it was discovered in the Adirondack Mountains on the 

 fetid currant, in Iowa on the red currant, and is now known to 

 affect several other kinds of currants both red and white. 

 Gooseberries are also subject to the disease. 



The injury from anthracnose, also known as leaf-spot and 

 leaf-blight, comes from its effect upon the leaves and fruit. 

 Plants are known to have been completely defoliated by July 

 10, and a loss of one-half to two-thirds of the crop of fruit is 

 on record. This early defoliation interferes with the proper 

 ripening of the wood and the formation of fruit-buds for the 

 next year. The disease also affects unfavorably the quality 

 of currants for wine. Old plantations are said to suffer more 

 than young ones, yet the disease is of considerable importance 

 in the nursery. In the nursery older bushes usually suffer 

 more than the first-year cuttings, due perhaps to the fact that 

 the young cuttings are planted on ground which is not ordinarily 

 used for currants and gooseberries. Cuttings in close proximity, 

 however, to the older diseased bushes are very likely to become 



