92 rUl^GI AND FUXGICIDES 



to ripen it ; and, in any case, it has no opportunity to 

 store up yitality for the coming season's fruitage. 



The life-histories of the two S2:)ecies of fungi con- 

 cerned in the attack do not seem to have yet been defi- 

 nitely worked out. Sometimes the Cercospora is the 

 cause of the disease, and sometimes the Septoria. The 

 spores apparently pass the winter in connection with the 

 fallen leaves. 



Treatment. — Spraying with some fungicide, like 

 the ammoniacal copper carbonate solution, promises to 

 be a preventive of this disease. The first application 

 should be made^arly — soon after the leaves fully expand. 

 Gathering and burning, or composting the fallen leaves, 

 will prove helpful in destroying the spores. In case the 

 leaves are com2')osted, the resulting fertilizer should, of 

 course, be applied to some crop away from any currant 

 or gooseberry bushes. 



Literature. — This spot disease has been discussed 

 by Professor A. B. Seymour, in the report of the Min- 

 nesota State Horticultural Society for 1886 (v. XIV, p. 

 239); by Professor L. 11. Pammel, in Bulletin Xo. 13 

 of the Iowa Experiment Station (pp. G7-70) ; and by 

 Dr. B. D. Halsted, in the report of the Xew Jersey 

 State Horticultural Society for 1889 (p. 156). 



The Currant Anthracnose 



Glceosporium ribis 



This disease has only attracted attention in this 

 country during recent years, and has been especially 

 studied in Xew York by Professor Dudley (Cornell Ex- 

 periment Station, Bulletin XV). It first aj^pears in 

 June or the early part of July, in the shape of small, 

 dark brown or blackish spots, about one-twenty-fifth of 

 an inch in diameter, chiefly on the upper leaf surface. 

 The spots enlarge, and the cuticle of the leaf is pushed 



