280 F. Petrak: Pilze 1919 (ohne die Schizomyceten und Flechten). [66 



613. Cook, M. T. and Helgar, J. P. Diseases of grains and forage 

 crops. (New Jersey Agric. Exper. Stat. Giro. Nr. 102, 1918, 16 pp., 4 tab.) 



614. Cook, M. T. and Martin, \V. H. Leaf blight of the tomato. 

 (New Jersey Agric. Stat. Circ. Nr. 96, 1918, p. 1—4.) 



615. Coons, G. H. The Soft Root of Hyacinth. (Ann. Rep. 

 Michig. Acad. Sei. XX [1918], 1919, p. 353—354, PI. XXXIX— XL.) 



616. Dana, B. F. A preliminary note on foot-rot of cereals 

 in the northwest. (Science See. Ser. L, 1919, p. 484—485.) 



617. Detwiler, S. B. White pine blister rust control in 1919. 

 (Report on White pine blister rust control 1919. Publ. by the Amer. Plant 

 Pest Com. Boston, Mass. Bull. Nr. 4, 1919, p. 1—10.) 



618. Dudley.P.H. Fungi the cause of decomposition of timber. 

 (Wood-Praserding V, 1918, p. 26—35, Fig. 1—10.) 



619. Dufrenoy, J. False Witches' brooms of the Ericaceae. (Proc. 

 Journ. Washington Acad. Sei. VIII, 1918, p. 527—532.) 



620. Elliott, J. A. Storage rots of sweet potatoes. (Arkansas 

 Agric. Exper. Stat. Bull. Nr. 144, 1918, p. 1—15, PI. 1—4.) 



621. Farrel, J. Apple culture in Victoria-Fungus diseases 

 and their treatment. (Journ. Dept. Victoria XVII, 1919, p. 148 — 157, 

 287—295, 449—463.) 



622. Ferdinandsen, C. und Rostrup, S. versigt over Sygdomme 

 hos Landbrugets og Havebrugets kulturplanter 1918. (Tidskr. 

 for Planteavel. 26, 1919, p. 683—733.) 



623. Fischer, Ed. Eine Mehltaukrankheit des Kirschlorbeers. 

 (Schweiz. Obst- u. Gartenbauztg. XXI, 1919, p. 314—315, 1 Textfig.) — 

 Siehe „Pflanzenkrankheiten", Ref. Nr. 226. 



624. Fischer, W. Die Brennfleckenkrankheit der Bohnen. 

 (Fühlings Landw. Ztg. 1919, 68. Jahrg., p. 241—259.) — Siehe „Pflanzen- 

 krankheiten", Ref. Nr. 156. 



625. Frag'oso, R. G. La ,, Anthracnosis" o ,,Rabia del guisante" 

 (Ascochyta Pisi Lib.). (Bol. Real. Soc. espan. Hist. Nat. XIX, 1919, p. 189 

 bis 196, 1 Tab., 3 Fig.) — Siehe „Pflanzenkrankheiten", Ref. Nr. 157. 



626. Freemaii, E. M. The story of the black stem rust of 

 grains and the barberry. (Minnesota Agr. Ext. Dis. Bull. Nr. 27, 1918, 

 8 pp., 5 Fig.) 



627. Foex, E. Sur le pietin du ble. (Compt. Rend. Acad. Agr. 

 France V, 1919, p. 543—548.) 



628. Fromme, F. D. and Thomas, H. E. Black root-rot of the 

 apple. (Journ. Agr. Research 1919, p. 163 — 174.) 



629. Giddin^js, N. J. Infection and Immunity in Apple Rust. 

 (West Virginia Univ. Agric. Exper. Stat. Morgantown Techn. Bull. Nr. 170, 

 December 1918, 72 pp., 11 PI.) — Siehe „Pflanzenkrankheiten", Ref. Nr. 379. 



630. Giddinjjs, N. J. and Bersr, A. A coraparison of the late 

 blights of tomato and potato: a preliminary report. (Phytopatho- 

 logy IX, 1919, p. 209—210, 1 PI.) 



631. (iraves, A. H. Some diseases of trees in greater New 

 York. (Mycologia XI, 1919, p. 111—124, tab. 10.) — Siehe „Pflanzenkrank- 

 heiten", Ref. Nr. 279. 



632. Gregora, C. T. Heterosporium leaf-spot of timothy. (Phyto- 

 pathology IX, 1919, p. 576—580, 2 Fig.) 



