New York AGricuLTuRAL ExprriIMENT STaTIoN. 429 
The spots may be of different colors and usually have a dark 
border; as the spots enlarge and eat in, a seed is often exposed 
in the center. The berries do not rot, but the tissue becomes hard 
and wrinkled. Sometimes the disease girdles the stem of a fruite 
cluster, cutting off the supply of sap from the grapes beyond the: 
diseased line and causing them to shrivel and die. 
Treatment.— Anthracnose does not spread as rapidly as some: 
other vineyard diseases, neither does it yield as readily to treat~ 
ment. When a vineyard is badly infested with anthracnose, i 
requires prompt attention and careful treatment to control the 
disease. It is not satisfactorily controlled by the Bordeaux mix- 
ture treatment alone, which is recommended below for black rot 
and mildew. It is suggested that in addition to such treatment 
the plan be followed which is advocated by certain European au- 
thorities, of applying a warm saturated solution of copperas (iron 
sulphate) in spring when the buds are swelling, but before they 
begin to open. One per ct. or more of sulphuric acid may be 
added to the solution before it is applied. This solution must 
be handled with care as it is very caustic. It is applied with swabs 
or if the acid is not used it may be sprayed.” It is essential that 
the work be done thoroughly, covering all the surface of the canes. 
Mr. IT. H. King, Trumansburg, N. Y., reports that he has. 
been successful in controlling this disease upon the Vergennes, 
which is very susceptible to the disease, by pulling the loose bark 
from the vines and spraying thoroughly with Bordeaux mixture 
in the spring before the buds start and again three or four weeks 
later. | 
BLACK ROT. 
(Laestadia bidwellw (Ell.) V. & R.) 
Descriplion.— This disease may usually be found first on the 
leaves, where it forms circular, bright reddish brown, or pale 
brown spots on which there appear later little black dots or pim- 
25 Beach, N. Y. Agr. Exp. Sta. Bul. 86: 79. 1896. Lodeman, Spraying of 
Plants, pp. 45, 152, 294. 
