Netherlands Journal of Plant Pathology

, Volume 79, Issue 5, pp 218–220 | Cite as

Tylose formation in elms after inoculation with Ceratocystis ulmi, a possible resistance mechanism

  • D. M. Elgersma


After inoculation of elms withCeratocystis ulmi tylose formation in vessels of the susceptible clone ‘Belgica’ appeared to be delayed in comparison with tylose formation in the resistant clone ‘390’. It is suggested that tylose formation may be a resistance mechanism in elms to Dutch elm disease.


Na inoculatie van iepen metCeratocystis ulmi bleek de thyllenvorming te zijn vertraagd in de vaten van de vatbare kloon ‘Belgica’ in vergelijking met de thyllenvorming in de resistente kloon ‘390’ (Fig. 1). Thyllenvorming zou een resistentie mechanisme kunnen zijn tegen de iepziekte.


Plant Pathology Resistance Mechanism Resistant Clone Susceptible Clone Tylose Formation 
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Copyright information

© Koninklijke Nederlandse Planteziektenkundige Vereniging 1973

Authors and Affiliations

  • D. M. Elgersma
    • 1
  1. 1.Phytopathological Laboratory ‘Willie Commelin Scholten’Baarnthe Netherlands

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