(85) 
Nalepa, A. Die Phytoptocecidien von Tilia und ihre ErBEGBER,; (Verhandl. Zool.-Bot. 
Ges. Wien LXX [1920], p. 49—64.) 
— Die Phyotptocecidien von Tilia und ihre Erzeuger. (Verhandl. Zoolog.-Bot. Ges. 
Wien LXX [1920], p. 65—68 [Schluß].) 
— Neue und wenig bekannte Eriophyiden. (Ibidem p. 81-98.) 
Neal, D.C. Phony peaches; a disease occurring in middle Georgia. (Phytopathology X 
[1920], p. 106—109, Pl. IX, Fig. 1.) ; ; 
Newell, W. Citrus canker. (Monthly Bull. State Comm. Hort. Calif. VI [1917], 
p. 263—268, 3 Pls., Fig. 74-75.) 
Nicholson, C. G. Some vegetable parasites. (Sci. Am. II [1920], p. 87-97.) 
Nilsson-Ehle, H. Über Resistenz gegen Heterodera Schachti bei gewissen Gersten- 
sorten, ihre Vererbungsweise und ihre Bedeutung für die Praxis. (Hereditas, 
Genetisk Arkiv Bd. I [1920], p. 1 ff.) 
Nishimura, M. A carrier of the mosaic disease. (Bull. Torrey Club XLV [1918], 
p- 219233, Pl. VII.) 
Norton, J. B.S. Internal action of chemicals on resistance of tomatoes to leaf diseases. 
(Maryland Agric. Exp. Stat. Bull. 192 [1916], p. 17—30, 1 Fig.) 
— Peach yellows and peach rosette. (Monthly Bull. State Comm. Hort. Calif. VI 
1917), p. 282—286, Fig. 87—89.) 
Nowell, Wm. Internal Disease of Cotton Bolls in the West Indies II. (West-Indian 
Bulletin. XVII [Barbados 1918], p. 1—23.) 
—- Report of an investigation of froghopper pest and diseases of surgar-cane in 
Trinidad. (Dept. Agric. Bull. Trinidad and Tobago XVIII [1919], p. 57—69.) 
— A root disease of cacao in Trinidad. Rosellinia pepo. (Ibidem p. 178—199, 
Fig. 1—5.) } 
O’Gara, P. J. A Podosporiella disease of BREIRNRE wheat. (Phytopathology V 
[1915], p. 3233—326, Pl. XV—XVI.) 
— A new disease of germinating wheat. (Science 2. Ser. XLII [1915], p. 313—314.) 
— Oeccurrence of the bacterial of Sudan grass in the Salt Lake Valley, Utah. (Ibidem 
p- 314—315.) 
— Occeurrence of Thielavia basicola as a root parasite of watermelons in the Salt 
Lake Valley, Utah. (Science 2, Ser. XVII [1915], p- 314.) 
— A bacterial disease of western wheat-grass. First account of the occurrence of 
a new type of bacterial disease in America. (Ibidem p. 616—617.) 
— A bacterial disease of western wheat grass, Agropyron Smithii. Occurrence of a new 
type of bacterial disease in America. (Phytopathology VI [1916], p. 341—350, 
Pl. 9—13.) 
— The white-spot disease of alfalfa. (Science 2. Ser. XLVIII [1918], p. 299—301.) 
— A fungus of uncertain systematic posıtion occurring on wheat and rye. in 
2. Ser. XLIN [1916], p. 111—112.) 
— A Phoma disease of western wheat-grass. (Ibidem p. 110—111.) 
— A new leaf-spot disease of he ee persicaria. (Mycologia IX ANER p- 248, 
PL. X.) 
Olive, E, W. A trip to Texas to Ynvestigntt cotton rust. (Brooklyn Bot. Gard. Rec. VI 
[1917], p. 154—158.) j 
— Potato diseases. (Brooklyn Bot. Gard. Leaflets VI [1918], 4 pp.) z 
Opitz, Schutz der Erbsen- und Bohnenfelder vor pilzlichen Krankheiten. (Zeitschr. 
d. Landwirtschaftsk. f. d. Prov. Schlesien XXIII [1919], p. 232.) j 
Orton, C, R. The diseases of the potato. eg Agric. ae Stat. Bull. 140 
. [1916], p. Si 23 Sn : s 
