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Abstract

Almost 50% of the variation in leaf wetness duration can be explained by maximum and minimum temperatures, rainfall and hours with relative humidity above 90% on a daily basis. All of these parameters can be estimated from a standard weather station. If variables related to wind are added the level of explanation increases to 69-76%. Leaf wetness duration explained up to 42% of the rate of disease increase (RDI) for S. nodorum. Leaf wetness duration was accumulated over a 5-day 'window' period and correlated with rate of disease increase after a 7-day 'lag' period. Standard weather variables could explain 20-34% of the disease increase. The relevance of these statistical models to disease prediction is discussed.

Keywords

epidemiology; Septoria nodorum

Published in

European Journal of Plant Pathology
1996, volume: 102, number: 1, pages: 9-20
Publisher: SPRINGER

SLU Authors

  • Djurle, Annika

    • Sveriges lantbruksuniversitet, Swedish University of Agricultural Sciences

  • Ekbom, Barbara

    • Department of Entomology, Swedish University of Agricultural Sciences

  • Yuen, Jonathan

    • Sveriges lantbruksuniversitet, Swedish University of Agricultural Sciences
    • Uppsala University

UKÄ Subject classification

Agricultural Science

Publication identifier

  • DOI: https://doi.org/10.1007/BF01877111

Permanent link to this page (URI)

https://res.slu.se/id/publ/52184