371 
Notes on Three New or Noteworthy Diseases of Plants. 
By F. D. CHESTER, 
During the work of the past summer my attention has been 
called to three diseases of cultivated plants, caused by fungi, 
which are apparently new. 
A brief description of them will be given here, while a fuller 
account, with figures, will be reserved for one of the regular pub- 
lications of the Experiment Station. 
ANTHRACNOSE OF THE TOMATO. 
This disease appeared during the past summer upon the 
grounds of the Experiment Station, where it has caused a con- 
siderable destruction of fruit. 
So far as observed it does not affect the green tomato, but 
rather at the point when it just begins to color, and from that on 
to complete ripening. When, however, an attack is onte made, 
the malady spreads so rapidly as to occasion serious loss before 
the fruit can be gathered. 
The disease shows itself upon the tomato as sunken, discol- 
ored spots, each with a dark center, becoming black. These 
spots increase in size, or by confluence cover a large portion of 
the decaying fruit. Over this area the fruit is black and. 
shrunken, flattened or depressed, surrounded by a shrunken, cor- 
rugated, discolored skin; the dark centers due to the gregarious 
acervuli with their dark sete. 
The disease is easily and quickly produced by introducing the 
spores within a puncture made by a sterilized needle, but no re- 
sults have yet come from repeated attempts to produce the 
disease by sowing the spores upon the uninjured surface of either 
ripe or green tomatoes. The fungus causing the trouble is a 
species of Col/etotrichum. It is clearly distinct from C. nigrum 
E. & Hal., found by Dr. B. D. Halsted on cultivated peppers, 
which, however, it somewhat resembles. Attempts to grow the 
tomato fungus on peppers, even by introducing the spores of the 
latter beneath the skin, were unsuccessful. : 
The following botanical description of the fungus is ap- 
pended: 
