4(5 
The tender-skinned grapes are more susceptible to this disease 
than the tougher-skinned varieties. Diamond, Salem, Elvira, 
Brighton and others suffer most. 
Remedy. — Anthracnose is the most troublesome disease in the 
vineyard because it is not so easily controlled as the others. Bor- 
deaux mixture, which is so effectual in the treatment of the other 
fungous diseases, fails to give good results when used against the 
anthracnose. The treatment used by European vineyardists is the 
best remedy known. It consists in washing the vines and posts 
with a solution made of 
Sulphate of iron, 110 pounds. 
Sulphuric acid, 1 quart. 
Water (hot), 26 gallons. 
The sulphuric acid is first poured upon the sulphate of iron crys- 
tals and then the water is added. This solution is applied by means 
of a swab made by tying a few rags to a stick. All portions of the 
vine are washed, the parts being blackened as the liquid touches 
them. This treatment is given in the spring, while the vines are 
dormant. 
DOWNY MILDEW. 
(Pemnospora vitlcola. ) 
This fungus occurs on the wild and cultivated grapes in nearly 
all parts of the United States, and is a native of this country. It 
is more severe on some varieties than others, though none of them 
are entirely proof against its attack. The downy mildew is a seri- 
ous enemy of the grape, because it destroys the vitality of the 
vine. In this respect it is in reality a greater enemy than black 
rot. It is also more prevalent in Pennsylvania than the black 
rot and, therefore, the vineyardist should concern himself about this 
disease, learn to know its symptoms and the proper treatment. 
Symptoms.— Evidences of this disease, when present, may be found 
on the leaves, stems or berries of the vine. On the leaves will be 
found patches of a lighter green than the normal healthy leaf. 
These patches are of various shapes and sizes, from one-fourth of an 
inch to two inches in diameter. As the disease advances these 
patches turn yellow, and later the leaves become brown and dead 
long before their proper time. When these patches are turning yel- 
low, if the under side is examined, a patch with a frosty covering will 
be found to. correspond in size and shape with the yollowpateh on the 
upper side. This is the best symptom of the disease. The frost-like 
material is the fruiting portion of the fungus. The mycelium, or 
vegetative portion, is growing wholly within the tissue of the leaf 
