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— Susceptibility of Zanthoxylum clavahercules to Bacterium citri. (Ibidem VIII 

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Johnston, J. R. and Bruner, S. C. A Phyllachora of the royal palm. (Mycologia X 



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



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 Jones, L. R. Disease resistance in cabbage. (Proceed. Nation. Acad. Sci. IV [1918], 



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Soil temperature as a factor in phytopathology. (Plant World XX [1917], p. 



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and Gilbert, W. W. Lightning injury to herbaceous plants. (Phytopathology VIII 



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 KeiBler, K. von. Uber Pilze auf Orchideen im Reichenbach'schen Herbar. (Beihefte 



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— Inoculation experiments with species of Coccomyces from stone fruits. (Journ. 

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Kinzel, Wilhelm. t)ber das Verderben, insbesondere uber den durch Milbenbefall 



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 Klar, Joseph. Der Kartoffelschorf sowie das Blaugrauwerden des Fleisches innerhalb 



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 Knuchel, H. Der Stand der Hausschwammforschung. (Schweiz. Zeitschr. Forstwes. 



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 Kock, G. Ein fur Osterreich neuer Schadling auf Picea pungens. (Osterr. Garten- 



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 Koessler, J. H. Studies on pollen and pollen disease. I. The chemical composition 



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 Krakover, L. J. The leaf -spot disease of red clover caused by Macrosporium sarcinae- 



forme Cav. (Annual Rep. Michigan Acad. Sci. XIX [1917], p. 275—328, 5 PL, 

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Laidlaw, W. and Brittlebank, C. C. „ Black spot" and ,,leaf curl". (Journ. Dep. Agric. 



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 Lee, H. Atherton. Further data on the Citrus canker affection of the Citrus species 



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Lek, H. A. A. van der. Verwelkingsziekten bij cultuurgewassen. (Tijdschr. Planten- 

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Over de zogenamde ,,kwade harten" of „zwart pitten" der erwten. (Ibidem XXIV 

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— Over de z. g. „ verwelkingsziekten", in het bijzonder die welke door Verticillium 



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verv. 



Levin, E. Control of lettuce rot. (Phytopathology VII [1917], p. 392 393.) 



Lind, J. Kortfattede praktiske Anvisnmger til Bekampelse af Haveplanternes Syg- 

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