192 REPORT OF THE BOTANIST OF THE 
CANKER.’ 
(Sphaeropsis malorum Pk.) 
This disease has killed a good many Spitzenberg trees in the 
vicinity of Voorheesville and New Scotland in Albany Co. It 
occurs destructively at Pomona and Blauvelt in Rockland Co. 
At Blauvelt it is especially troublesome on the variety Sour Bough. 
It has also been observed at Yorktown and Poughkeepsie. 
SOOTY BLOTCH. 
(Phyllachora pomigena (Schw.) Sace. ) 
Rare. A little found on apples received from Newburgh and 
Yorktown. 
RUSSETING OF FRUIT. 
Russeted apples are reported to have been common in the 
vicinity of Hudson. We have seen the disease on Baldwins and 
Ben Davis at Poughkeepsie. The affected fruits were frequently 
misshapen and showed irregular areas on which the skin was rough 
and light brown in color. ‘This appearance is sometimes due to 
spraying and sometimes to weather conditions alone.* It is often 
incorrectly called rust. 
RUST. 
(Gymnosporangium spp. Syn. Loestelia spp.) 
This is a fungous disease in which circular yellow spots appear 
on the leaves in June. It may attack the fruit also. The red 
cedar, the host of the teleuto stage of the fungus, grows spontane- 
ously throughout the entire district and “cedar apples” were 
found quite commonly upon it during early May in Ulster and 
Rockland counties; but the eecidial stage upon the apple has been 
entirely absent. 
7 For an account of Apple Canker, see Bulletin 163 of this station. 
8See Bulletin 84 of this station, pp. 29-33. 
