186 REPORT OF THE BOTANIST OF THE 
under control by cutting out and burning the knots. It is much 
less destructive to the cherry than to the plum. Probably the 
disease has spread less than usual during the past season. We 
have sought for it on the wild black cherry, Prunus serotina, 
but have failed to find it on that host in Western New York. 
Luar Buieut (Cylindrosporium padi Karst.).—Leaf blight has 
given very little trouble either to bearing trees or to nursery 
stock. In the nurseries of Western New York cherry. seedlings, 
especially those of the Mazzard type, often suffer severely from 
leaf blight, but in 1900 cherry foliage was generally quite per- 
‘fect. : 
WitcuEs’ Brooms (Lavoascus cerasi (Fckl.) Sadeb.)—This fun- 
gus is now known to occur on the cultivated cherry in three 
localities in Western New York; viz., at Sodus Center in Wayne 
County, Appleton in Niagara County, and Elba in Genesee 
| County. In each case it was found only on a single tree. Other 
places in New York where it is known to exist are Athens, West 
Athens and Catskill (all in Greene County) and various places on 
Long Island. It is not likely to become troublesome. | 
Hain Injury.—Hailstones too small to break the bark may 
bruise it in such a way as to cause the formation of brown, corky 
spots within the bark. Many such spots are indicated exter- 
nally by the lighter color of the outer bark which may also be 
slightly elevated; but many others are revealed only when the 
outer layer of bark is removed. We have observed such hail 
injury to cherries at Geneva. (See Hail injury to plum, page 
202.) 
Lear Scorcu.—Although the season of 1900 was drier than 
that of 1899 there was none of the cherry leaf scorch such as 
occurred in 1899. We have watched the Maxwell cherry orch- 
ard which was so severely affected by leaf scorch in 18997 to 
determine the effect upon the crop of 1900. This orchard con- 
tained 715 11-year-old Montmorency trees. About the middle of 
August, 1899, 75 to 85 per ct. of the foliage on 637 of these 
trees was killed by leaf scorch; and on 57 more 50 per ct. of 

* See Bul. 162 of this Station, pp. 172-175, 
