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An Unknown Disease Among the Elms II entire text
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A-stage affected Amersfoort Amersfoort 3-yr graft annual rings appeared Baarn bacteria branches brown Brussoff Bud Negative Controls campestris cause Cephalosporium Ceratostomella ulmi Schwarz cherry agar Christine Buisman Controls all negative coremia cultures discolored rings discolored wood disease symptoms diseased elms diseased trees diseased wood Dutch elm disease elm bark beetles ELM SPECIES elm trees F. W. Holmes foliage fungal fungi fungus Graphium ulmi Schwarz Haarlem Hague healthy hyphae inoculation inoculation experiments investigation isolated Johanna Westerdijk Kerling leaf leaves Micrococcus ulmi microns mold Munch mycelium Nectria Netherlands nurseries nutrient observed older graft Opheusden Oudenbosch parasite perithecia phytopathologists Plant Disease Plate Prof Renkum roots Rotterdam seedlings showed slightly diseased Spierenburg spores spread streaks summer susceptible Translated by F. W. trunk twigs Ulmus glabra University of Utrecht Utrecht 2-yr graft vascular Verticillium vessels Wageningen Willie Commelin Scholten withering Wollenweber yeastlike yr graft