(140) 
Nannizzi, A. La lotta contro le Cuscute. (La Difesa agric. [Siena 1914], Nr. 8.) 
— Le principali malattie crittogamiche delle piante coltivate, osservate nel Senese 
nel 1914. (La Difesa agric. [Siena 1915], Nr. 2.) 
— Il nemici del pane. (Ibidem Nr. 25 [1915].) 
Narasimhan, M. J. A preliminary study of the root-nodules of Casuarina. (Indian 
Forester XLIV [1918], p. 265—268.) 
Neweomer, E. J. Some Stoneflies injourious to vegetation. (Journ. Agric. Research 
Washington XIII [1918], p. 37—41, Pl. II—-IV.) 
Norton, J. B. Washington asparagus: information and suggestions for growers of 
new pedigreed rust-resistant strains. (U. S. Dept. Agric. Office Cotton, Truck 
and Forage Crop Diseases, Circ. Washington Nr. VII [1919], 8 pp.) = 
Nowotny, Robert. Gesetzmäßigkeiten bei der Fäulnis von Holzstangen. (Die Um- 
schau XXII [1918], p. 541—544.) , 
Onodera, J. Untersuchungen über die Beschädigung der Pflanzen durch Säuren 
und über die Reizwirkungen der Säuren auf Pflanzen. (Berichte d. Ohara Instituts 
f. landw. Forsch. Kuraschiki (Japan). Bd. I [1916], p. 53—110, 2 Photo.) 
Opitz. Fusariumbefall und Auswinterung verschiedener Winterweizensorten. (Mitteil. - 
d. deutsch. Landwsch. Ges. XXXVI [1920], p. 488—489.) 
Orton, W. A. Breeding for disease resistance in plants. (Amer. Journ. Bot. V [1918], 
p- 279—283.) : 
Osborn, T. G. B. Report of the Consulting Botanist and Plant Pathologist. (Rept. 
Min. Agric. South Australia [1917—1918] 1918.) Se 
' Osner, George A. Stemphylium Leafspot of Cucumbers. (Journ. Agric. Research _ 
' Washington XIII [1918], p. 295—306, Pl. XXI—XXIV, 3 Textfigs.) 
Paillot, A. Perezia legeri n. sp. Microsporide nouvelle, parasite des chenilles de Pieris 
brassicae. (Compt. Rend. Soc. Biol. Paris Tome LXXXI[1918], p. 187—189, 1 Fig.) 
PantanelliÄ, E. Le malattie crittogamiche del frumento. A cura della Unione Pro- 
duttori Grano da seme Rieti. (Roma 1915, 32 pp. 8°. Figg.) 
Pape, H. Brennesselschädlinge. (Deutsche Landw. Presse XLVI Ba p- is 026 
7 Abb.) 
Paravieini, E. Favolus europaeus Fr. Ein Schädling des Noßlennens (Schweiz. 
Zeitschr. Forstwes. LXX [1919], p. 15—17.) 
Parrot, P. J., Hodgkiss, H. E. and Hartzell, F. Z. The rosy aphis in relation to ab- 
‚normal apple structures. (New York Agric. Experim. Stat. ke Bull. LXVI 
[Geneva 1919], 29 pp. 8 Pl. [2 color.] 6 Fig.) 
Patouillard, M. Sur le parasiieme de Y’Ustulina vulgaris. (Bull. Soc. Path. ve 
France IV [1918], p. 100) ; ; 
Paulsen, F. Roncet. (La Viticolt. moderna XXI [Palermo 1915], p. 387-391, 
416—422.) : 
Peglion, V. La Peronospora del Pomodoro: Er infestans. (L’Italia agric. L1 
[Piacenza 1914], p. 120—121.) 
Peltier, George L. Süsceptibility and resistance to Citrus-Canker of the Wild relatives, 
Citrus Fruits, and Hybrids of the genus Citrus. (Journ. Agric. Researgh Weshingeen 
XIV [1918], p. 337—357, Pl. L-LIII) 
Peltier, George L. and Neal, David C. Overwintering of the Citrus-Canker Organism 
in the Back Tissue of Hardy Citrus Hybrids. (Ibidem p. 523—524, Pl: LV 
Peltier, George L. and Frederich, William J. Relative Susceptibility to Citrus-Canker 
of Different Species and Hybrids of the Genus Citrus, including the wild 
latives. (Journ. Agric. Research Water XIX De p- u 
Pls, men 
