PEACH DISEASES 319 
REFERENCES ON PEacH-MILDEW 
Jackson, H. S. Peach diseases. Powdery mildew. Oregon Crop 
Pest and Hort. Bienn. Rept. 1911-1912 : 257-259. 1913. 
Whipple, O. B. Peach mildew. Colorado Agr. Exp. Sta. Bul. 107: 
3-7. 1906. 
Stewart, V. B. Some important leaf diseases of nursery stock. Mil- 
dew of rose and peach. Cornell Univ. Agr. Exp. Sta. Bul. 358: 
221-226. 1915. 
Stewart, F. C. Notes on New York plant diseases, I. Peach. Pow- 
dery mildew, Spherotheca pannosa (Wallr.) Lév. New York 
(Geneva) Agr. Exp. Sta. Bul. 328: 370-371. 1910. 
Selby, A. D. Preliminary report upon diseases of the peach. Peach 
mildew. Ohio Agr. Exp. Sta. Bul. 92 : 225-226. 1898. 
Smith, E. F. Field notes, 1891. Peach mildew. Journ. Myce. 7: 
90-91. 1892. 
Cesar, L. Peach diseases. Powdery mildew. Ontario Agr. Dept. 
Bul. 201: 40-41. 1912. 
ARMILLARIA Root-Rot 
Caused by Armillaria mellea (Fries) Quel. 
In some sections of the country the peach among many 
other fruit-trees is injured by the Armillaria root-rot. For a 
fuller discussion of the disease, see Apple, page 96. 
CurtocyBE Root-Rot 
Caused by Clitocybe parasitica Wilcox 
The disease in question has been called rhizomorphic root- 
rot. It occurs also on the apple and cherry. Facts concern- 
ing its range, symptoms, cause and control are discussed under 
Apple, page 102. 
Rust 
Caused by Puccinia Pruni-spinose Pers. 
This rust disease, due to Puccinia Pruni-spinose, occurs on 
practically all the stone-fruits, but in the United States it 
affects chiefly the plum. Certain stages in the development of 
