New YorK AGRICULTURAL EXPERIMENT STATION. 131 
culture cooperated with the Station in some experiments on the 
treatment of the diseases of nursery stock. wus of this work con- 
sisted of spraying experiments. 
On cherry stocks tests were made with bordeaux mixture and 
the ammoniacal solution.*4 The latter injured the foliage some, 
but the bordeaux did no harm and the trees sprayed with it held 
their leaves better and made a better growth than untreated trees, 
which were prematurely defoliated by leaf spot? and powdery 
mildew.*® In 1893 the experiments were continued by the Station, 
but no additional information was gained owing to the scarcity of 
leaf diseases that year.* 
In 1895 and 1896 experiments were made on the prevention of 
leaf spot and fruit rot®® in bearing cherry orchards by spraying the 
trees with bordeaux and eau celeste.°? Unfortunately, very little 
leaf spot appeared in the orchards under experiment, and there 
was only a moderate attack of fruit rot. The conclusion reached 
was that the spraying of bearing trees is of doubtful utility. In 
1895 spraying with bordeaux injured the foliage; besides, during 
a considerable portion of the time when the treatment should be 
given, the use of bordeaux is objectionable, since it remains upon 
the fruit and injures its market value. 
In the spring of 1885 it was discovered that the fruit rot fungus 
is sometimes responsible for the destruction of large numbers of 
cherry flowers. A brief study of the fungus was made at .this 
time and the report of this work constitutes one of the early pub- 
lications on the subject. 
In rgo1 the interesting observation was made®! that the leaf spot 
fungus may attack cherry fruit-stems as well as the leaves. It ap- 
pears that this had not been previously known. 
Other cherry diseases studied more or less are black knot,™ 
witches’ brooms and leaf scorch. 
Rpt. 11:654-659 (1892). 
° Cylindrosporium padi Karst. 
** Podosphera oxyacanihe (D.C.) De By. 
* Bul. 72 (1894); same in Rpt. 12:688-6093. 
"Sclerotinia fructigena (Pers.) Schrt. 
* Bul. 98:15-17 (1896); Bul. 117:140 (1897) ; see also Rpt. 15:402-407. 
° Rpt. 4:280-285 (1885). j 
* Bul. 200:85-87 (1901); same in Rpt. 20:146-148. 
” Plowrightia morbosa (Schw.) Sacc. Bul. 40 (1892). 
* Exoascus cerasi (Fckl.) Sad. Rpt. 14:532 (1895) ; Rpt. 15:459 (1806) ; 
Bul. 191:309 (1900). 
* Bul. 162:171-176 (1899) ; same in Rpt. 18:159-164. 
