1a ae New YORE AGRICULTURAL EXPERIMENT STATION. 321 
the whole surface, in which case the destruction of the leaf is 
quickly accomplished. 
_ Under the final action of the fungus, the leaf becomes thoroughly 
dried and shriveled as if burned, and the tissues are particularly 
brittle. It very rarely occurs that the mildew itself occurs onjthe 
upper surface of the leaf. In severe cases, the growth of the 
fungus extends to the young shoots, although the conidia-bearing 
filaments do not appear, excepting upon the youngest and most 
_ tender of these, the action of the mycelium checks theirzfurther 
developments, and finally the tissues are killed. 
The effect upon the shoots is often to produce dark colored, 
_ slightly depressed markings as a consequence of the sinking away 
of the'tissues beneath. These markings are quite distinct from 
_ the deep and lacerated lesions of anthracnose. 
- Ithas been stated that the mildew only attacks the berries 
_ when they are quite young, and so far as observed by the writer 
this is true. The affected berries rarely attain more than one- 
fourth their full sizes often remaining no larger than small peas; 
_ they soon turn brown or, when the fungus fruits upon them, 
_ gray in color. There is thus produced a kind of “rot” which 
is popularly named “brown rot” or “gray rot.”—F. Lamson 
Scribner’s report, United States Department of Agricultural, Fun- 
gus Diseases of the Grape-vine. (Page 7.) 
ANTHRACNOSE. 
: Sphaceloma ampelinum (De Bary). 
_ On the shoots there first appear minute brown spots, a little 
_ depressed in the middle with a slightly raised darker colored rim 
or border. These spots soon increase in size, elongating in the 
direction of the striz of the bark, the central portion becomes 
more evidently depressed and usually takes on a grayish hue. 
_ The bark is finally destroyed, and, in severe cases, the woody tissues 
_ beneath appear as if burned or corroded so deeply sometimes as 
_ to reach the pith. 
: The appearance and action of the fungus on the leaves is similar 
4 to that upon the stems, and it is certainly very evident that where 
_ the diseased spots are numerous, and the action of the fungus pro- 
- ceeds without interruption, both shoots and leaves must succumb 
to the parasite. The intensity of the disease upon the shoots 
may cause the destruction of the young leaves, even when the 
4 41 
