Neue Litteratur. 89 



Hoff er, G. N. and J. R. Holbert. 1918. Results of com disease investi- 



gations. (Science. N. S. XLVII. p. 246—247.) 

 Hudig, J. en C. Meyer. 1918. De Hooghalensche ziekte een nieuwe 



bodemziekte op zand- en veengronden. (Den Haag, J. en H. van 



Langenhuysen. 1918. 8°. 25 pp. ill.) 

 Jagger, I. C. 1918. Host of white pickle mosaic disease of cucumber. 



(Phytop«ithology. VIII. p. 32—33.) 

 Jagger, I. C. and V. B. Stewart. 1918. Some Verticillium diseases. 



(Phytopathology. VIII. p. 15—19.) 

 Jehle, R. A. 1918. Susceptibility of Zanthoxylum clava-hercules to 



Bacterium citri. (Phytopathology. VIII. p. 34 — 35.) 

 Johnston, J. R. and S. C. Bruner. 1918. A Phyllachora of the royal 



palm. (Mycologia. X. p. 43—44. 1 pl.) 

 Jones, F. R. 1918. Yellow-leaf-blotch of alfalfa caused by the fungus 



P3Tenopeziza medicaginis. (Journ. agr. Res. XIII. p. 307 — 329. 



5 f. 3 pl.) 

 Keitt, G. W. 1918. Control of cherry leaf spot in Wisconsin. (Bull. 



Wisconsin agr. Exp. Stat. 1918. 286.) 

 Keitt, G. W. 1918. Inoculation experiments with species of Coccomy- 



ces from stone fruits. (Journ. agr. Res. XIII. p. 539 — 569. ill.) 

 Klebahn, H. 1918. Peridermium pini (Willd.) Kleb, und seine Ueber- 



tragung von Kiefer zu Kiefer. (Flora [Festschrift Stahl]. N. F. 



XI— XII. p. 194—207.) 

 Köck, G. 1918. Ein für Oesterreich neuer Schädling auf Picea pun- 



gens. (Oesterr. Gart.-Ztg. XIII. p. 147-148. 2 A.) 

 Pujiula, J. 1917. Effectos del frio en las hojas de Ficus elastica. 



(Treballs Inst. Catalana Hist. nat. 1917. p. 275-282. ill.) 



XIV. Bacteriologie. 



Bachmann, F. M. 1918. A bacteriological method useful for the study 

 of other micro-organisms. (Amer. Journ. Bot. V. p. 32—35. 2 f.) 



Beijerinek, M. W. 1918. De beteekenis van de bakterien der Papilio- 

 naceenknolletjes voor de voedsterplant. (Versl. kon. Ak. Wet. Am- 

 sterdam. XXVI. p. 1456-1465.) 



Browning, C. H. 1918. Applied Bacteriology. Studies and reviews of 

 some present-day problems. (London 1918. 8°. ill.) 



Brussoff, A. 1918. Ueber eine stäbchenförmige, kalkspeichernde 

 Eisenbakterie aus dem Klärschlamm einer biologischen Abwasser- 

 kläranklange. (Cbl. Bakt. 2. XL VIII. p. 193-210. 9 F.) 



Buchanan, R. E. 1918. Studies in the nomenclature and Classification 

 of the bacteria. V. Subgroups and genera of the Bacteriaceae. 

 (Journ. of Bact. III. p. 27—61.) 



Conn, H. J. 1918. The microscopic study of bacteria and fungi in 

 soil. (Techn. Bull. New York agr. Exp. Stat. Geneva, N. Y. 1918. 

 64. p. 1-20.) 



Gehring, A. 1918. Heterotrophe und autotrophe Bakterien. (Prome- 

 theus. XXIX. p. 322—323, 329—330.) 



Gutzeit, E. 1918. Die Bakterien im Haushalt der Natur und des Men- 

 schen. 2. Aufl. (Leipzig, 1918. 8°. VI, 138 pp. 12 F.) 



Kolkwitz, R. 1918. Ueber die Schwefelbakterien-Flora des Solgra- 

 bens von Artern. (Ber. deutsch, bo.t. Ges. XXXVI. p. 218—224.) 



XV. Lichenes. 



Bachmann, E. 1918. Der Thallus von Didymella Lettaniana Keissl. 

 (Cbl. Bakt. 2. XL VIII. p. 290—294. 6 F.) 



