New York AGRicuLTURAL EXPERIMENT STATION. EUS 
ulation experiment at Highland gave negative results. (See 
page 118.) 
During the past four seasons the writers have had under obser- 
vation a diseased dewberry plantation! at Highland, N. Y. Each 
Season this plantation has been seriously injured by a disease, 
the exact nature of which we have been unable to determine. 
In 1900 the crop was a complete failure. The fruiting canes, 
wholly or in part, wilt and die as in raspberry cane blight; and 
the seat, of the trouble seems to be located in a dead and dis- 
colored section of the cane. Such discolored sections showed no 
fungus on June 21, 1899, but on July 27, 1900, they were thickly 
covered with Coniothyrium and the wood at this point was 
brittle. Coniothyrium was also found on affected canes on June 
27, 1901, and on June 4, 1902. Observations made in 1901 indi- 
cate that part of the trouble was due to winter injury and a part 
to some other cause. Suspicion points to Coniothyrium as this 
other cause. 
One fruit grower claims to have seen a blackberry disease sim- 
ilar to the raspberry cane blight, but the writers have never seen 
anything to indicate that the disease attacks blackberries. In 
one instance a species of Coniothyrium was found on dead black- 
berry canes, but from the size of its spores and habit of growth 
on culture media it is evident that it was a different species than 
the raspberry Coniothyrium. (Compare Figs. 7 and 8, Plate X.) 
An attempt to inoculate blackberry canes with raspberry 
Coniothyrium failed. (See page 117.) 
CAUSED BY A FUNGUS. 
From the time of the first discovery of the disease at Coxsackie, 
N. Y., June 1, 1899, a Spheropsideous fungus with small, round- 
ish or elliptical brownish spores borne in pycnidia was suspected 
of being the cause. Every additional observation strengthened 
this suspicion until finally the evidence seemed so conclusive as 
scarcely to need the support of inoculation experiments. The 
fungus, a species of Coniothyrium, was constantly associated with 
the disease and nearly always in such a manner as to point plainly 
This is the plantation mentioned in’ Bul. 167_of this Station, page 294. 
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