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New YorK AGRICULTURAL EXPERIMENT STATION. IQ! 
named Peridermium strobi.® Subsequently, through inoculation ex- 
periments made by Klebahn and others,’ it was conclusively proven 
that Cronartium ribicola on the currant and Peridermium strobi on 
the pine are not separate species but only different stages of one 
and the same fungus. 
GEOGRAPHICAL DISTRIBUTION AND ECONOMIC 
IMPORTANCE. 
Cronartium ribicola occurs in several European countries, and 
probably in India;§ but has never been found in Australia or in 
South America and in North America but once as mentioned on 
page 189, footnote 2. 
It was originally described in 1856 from specimens collected in 
western Russia. Since that time it has been reported from other 
places in Russia even to the Ural Mts.® on the east and to the 
Caucasus Mts.!° on the south. In Germany it is common and the 
injury which it does to the white pine is of considerable economic 
importance. Klebahn™ has reported a destructive outbreak of the 
disease among white pines in the vicinity of Bremen in 1887. 
Tubeuf,” in 1808, stated that specimens of it were to be found 
all over Germany and that it was destructive in the northeastern 
part. Among other instances of severe damage he mentions a 
large nursery near the Holland border in which the culture of white 
pines had been entirely given up on account of the fungus. In 
another publication the same author stated that the disease was 
spreading and becoming a serious menace in Germany.'? Eriksson" 
describes its epidemic occurrence in Sweden. Bos” states that in 
*Klebahn (23). 
"Wlebahn (24, p. XLIX), (26), (27, p. 31), (20, p. 333), (30, Dp. 74); 
(32, p. 16), (35, p. 86); Rostrup (53, p. 187), (54); v. Wettstein (67) ; 
Sorauer (58); Eriksson (13, p. 380); v. Tubeuf (64); Hennings (20); 
Schéyen (56). 
*Tulasne (66, p. 189), mentions a Cronartium on Ribes in India. 
*Sorokin (59). 
* Speschneff (60). 
™ Klebahn (24, p. XLV). 
@yv. Tubeuf (63). 
* Tubeuf (61). 
“Eriksson (12). 
mrss (s). 
