16 DirEcTOR’sS REPORT OF THD 
directly through the milk of the patrons. Work upon this sub- 
ject will be continued. 
DEPARTMENT OF BOTANY. 
A parasite of carnation rust.—It has been discovered that the 
carnation rust fungus is frequently attacked by a parasite fungus, 
Darluca fium. Darluca is a well-known parasite of rust fungi, 
but, heretofore, it has not been known that it attacks carnation 
rust. The parasite is not likely to be a very important factor in 
the control of the rust. 
Anthracnose and stem rot of the snapdragon.—The cultivated 
snapdragon, Antirrhinum majus, is subject to a destructive fun- 
gous disease which spots the stems and leaves. It is called 
anthracnose and is caused-by an undescribed fungus to which 
we have given the name Colletotrichum antirrhini. In an experi- 
ment on the treatment of this anthracnose, plants sprayed once 
a week with Bordeaux mixture contint - in perfect health, while 
unsprayed plants in an adjoining row:were completely ruined 
by the disease. Upon the results of this experiment we base the 
following recommendations: Spray thoroughly with Bordeaux 
mixture once a week, commencing as soon as the plants are 
rooted and continuing until they are put into the greenhouse in 
the fall. if later sprayings seem necessary use ammoniacal solu- 
tion of copper carbonate instead of Bordeaux. Take cuttings 
only from healthy plants. 
Stem rot is another disease of the snapdragon in which succu- 
lent shoots suddenly wilt and die. It has been shown by inocu- © 
lation experiments that the cause of this trouble is a fungus be- 
longing to the genus Phoma. 
The sulphur-lime treatment for onion smut.—Smut is the most | 
destructive disease of the onion. It kills large numbers of the 
seedling plants. During the past five years we have been con- 
ducting extensive field experiments in Orange County on the pre- 
vention of smut by the use of sulphur and air-slaked lime. 
Where these substances were scattered in the open rows before 
the seed was sown the yield was increased at the rate of from 40 
