GRAPE DISEASES 253 
REFERENCES ON GRAPE-ANTHRACNOSE 
Shear, C. L. Grape anthracnose in America. Int. Cong. Vit. Rept. 
1915: 111-117. 1915. 
Hawkins, L. A. Experiments in the control of grape anthracnose. 
U.S. Agr. Dept. Plant Indus. Bur. Cire. 105: 1-8. 1913. 
Scribner, F. L. Report on the fungus diseases of the grape vine. 
Anthracnose. U. S. Agr. Dept. Bot. Div. Bul. 11:34-38. 
1886. 
Scribner, F. L. Some fungous diseases of the grape. III. Anthrac- 
nose of the vine and bird’s-eye-rot. Tennessee Agr. Exp. Sta. 
Bul. 4 (no. 4): 111-112. 1891. - 
Scribner, F. Lamson. Anthracnose Sphaceloma ampelinum, DeBy. 
U.S. Agr. Comm. Rept. 1886: 112-115. 1887. 
Quaintance, A. L., and Shear, C. L. Insect and fungous enemies of 
the grape east of the Rocky Mountains. Anthracnose. U. S. 
Agr. Dept. Farmers’ Bul. 284: 34-35. 1901. 
Lodeman, E. G. Some grape troubles of western New York. An- 
thracnose. Cornell Univ. Agr. Exp. Sta. Bul. 76: 442-443. 1894. 
Rainford, E. H. Treatment of anthracnose, with a comparison of the 
effects of various sprays and dressings. Queensland Agr. Jour. 7: 
529-532. 1900. 
Crown-GALL 
Caused by Bacterium tumefaciens E. F. Smith and Townsend 
This is the same disease which occurs on the peach, apple and 
other plants, a list of which appears on page 108. It is called 
crown-gall, crown-knot, root-tumor and black-knot (Fig. 66). 
Certain varieties are found to be more susceptible to the disease 
than others. In many localities the growing of varieties of 
grapes susceptible to crown-gall has become unprofitable. Sus- 
ceptibility is believed by certain authorities to vary with the 
susceptibility to frost-injury; others hold that sap-acidity is 
a factor in determining susceptibility. Among the kinds 
resistant to crown-gall may be noted: Concord, Catawba, 
Delaware and other American varieties. European grapes 
are more susceptible, and some of these, arranged in 
