New York AGRICULTURAL EXPERIMENT STATION. 129 
July 23, when it appeared in abundance and destroyed the few 
leaves left by anthracnose. 
Another form of so-called leaf spot which occurs on currant 
leaves in the Hudson Valley, sometimes in considerable abun- 
dance is that caused by the four-lined leaf-bug, Pacilocapsus 
lineatus.? The spots caused by this insect are angular and trans- 
lucent or else black with a water-logged appearance. (See Plate 
I, Fig. 4). They are wholly different in appearance from 
anthracnose spots and, moreover, they occur on leaves at the 
tips of the canes; whereas, anthracnose appears first on the 
lower leaves and may attack leaves on any part of the plant. 
A third leaf disease of currants is one which may be called 
leaf blight. It is caused by the fungus Cercospora angulata 
Wint. According to Pammel! this fungus is common on cur- 
rants in Iowa. 
In New York State it seems to be rare. In 1897 we received 
specimens of it from Highland, and in 1900 specimens were sent 
us from Long Island. During the past season we have sought 
for it in the Hudson Valley, but have not found even a trace of 
it. The spots formed by it are considerably larger than anthrac- 
nose spots. 
Occasionally we have met with a form of leaf spot caused by 
a species of Phyllosticta. The spots are larger even than those 
of Septoria ribis so there need be no danger of confusing them 
with anthracnose spots. 
THE FUNGUS. 
Gleosporium ribis (Lib.) Mont. & Desm. 
The fungus which is the cause of currant anthracnose was 
named Glaosporium ribis by Montagne and Desmazieres® in 1867. 
For some time previous it had been known as Leptothyrium ribis, 
which name is, therefore, a synonym. Cryptosporium ribis Fekl. 
is also a Synonym. 
As already stated, it attacks the leaves, petioles, fruit stems, 
3 See Bul. 167 of this Station, p. 291; also Cornell Agr. Exp. Sta. Bul. 58. 
*Pammel, L. H. Iowa Exp. Sta. Bul. 13.67. 
*Montagne & Desmazieres. Kickx’ Flore crypt. Flandres 2:95, 
9 
