228 P- Sydow: Pflanzenkrankheiten 1918. [32 



401. Rhoads, A. S., Hodgooek. G. G., Bethel, E. and Hartley, C. Host 

 relationships of tlie Xortli American rusts, other than Gymno- 

 sporangiums, which attack Conifers. (Phytopathology VIII, 1918, 

 p. 309 — 352.) — Neue Art ist Cronartium fusiformc Hedgc. et Hunt. (syu. 

 Peridermium jiisi forme Peck). 



402. Spaulding, P. Results of scientific investigations. (White 

 Pine Blister Rust, Com. Suppression Pino Blister Rust X. Amer. 1918, p. 37 

 bis 38.) 



403. Spauldiiitf, F. Seme biological aspects of the spread of 

 the white -pine blister rust. (Abstract.) (Journ. Wash. Acad. Sei. 

 VIII. 1918. Nr. 2. p. 40—41.) 



404. Stakinan, E. C, Parker, J. H. and Picmcisel, F. J. Can biologic 

 forms of stcmrußt of Avheat change rapidly enough to interfere 

 with breeding for rust resistance? (Journ. Agric. Research XIV, 

 1918, p. 111—123, tab. 13—17.) 



405. Stakman, E. C, Picmeisel, F. J. and Levino, M. N. Plasticity 

 of biologic forms of Puccinia graminis. (Journ. Agric. Research XV, 

 1918, p. 221—249. 2 PI.) — Siehe „Pilze" 1918, Ref. Nr. 620. 



406. Stone, R. E. Orange rust «i Rubus in Canada. (Phytopatho- 

 logy VIII, 1918, p. 27—29. 1 Fig.) 



407. Stone, R. E. Incubation period of Cronartium ribicola on 

 the white pine. (Phytopathology VIII, 1918, p. 438—440, 1 Fig.) 



408. Sylven, N. 1917 ärs knäckesjuka in norra Väster- 

 götland. [Der Kieferndreher im nördlichen Västergötland im 

 Jahre 1917.] (Medd. Stat. Skogsförsöksanst. XV, 1917. p. 192—204.— 

 Schwedisch und p. XIX — XXII deutsch.) 



409. Sylven, N. Über den Kieferndreher Melampsora pini- 

 torqua (Braun) Rostr. (Naturwiss. Zeitschr. f. Forst- u. Laudwirtstli. 

 1918, Heft 3/8, p. 118—127.) 



410. AVeir, .1. R. and Hubert, E. E. Cultures with Melampsorae 

 on Populus. (Mycologia VIII, 1918, p. 194—198.) — Siehe „Pilze" 1918, 

 Ref. Nr. 705. 



411. Weir, J. R. and Hubert. E. E. Notes on the overwiutering 

 of forest tree rusts. (Phytopathology VIII, 1918, p. 55—59.) 



412. Weir, J. R. and Hubert, E. E. Notes on forest tree rusts. 

 (Phytopathology VIII, 1918, p. 114—118.) — Siehe ,,Pilze'^ 1918, Ref. 

 Nr. 707. 



413. York, H. H. and Spauldintj. V. The ovcrwintering of Cro- 

 nariium ribicola on Ribcs. (Phyh.pathology VIII, 1918, p. 617—619.) — 

 Die Verff. berichten über erfolgreiche Infektion mit Uredosporen, welche im 

 Laboratorium auf trockenen Blättern überwintert waren. 



XIII. Hymenomyceten. 



(Hauptsächlich holzzerstörende Arten.) 



414. Boyce, J. S. Jmbedding and staining of diseased. 

 wood. (Phytopathology VIII, 1918, p. 432— 436.) 



415. Dalllnioro. "\V. Wood preservation. (Kew Bull. 1918, p. 181 

 bis 189.) 



