Effect of cultivar mixtures on the wave velocity of expanding yellow stripe rust foci in winter wheat.

Authors

  • A.A.M. Buiel
  • M.A. Verhaar
  • F. van den Bosch
  • W. Hoogkamer
  • J.C. Zadoks

DOI:

https://doi.org/10.18174/njas.v37i1.16656

Abstract

The wave velocity of an expanding focus of Puccinia striiformis was studied in 4 mixtures of the susceptible cv. Okapi and the resistant cv. Sarno grown in ratios of 1 : 0, 1 : 1, 1 : 2 and 1 : 4. Two methods of calculating velocity were employed: (a) the gradient method, based on the disease gradient moving away from the focus with time, and (b) the area method, calculated from the enlargement of the diseased area with time. Results revealed a logarithmic relationship between the wave velocity and the proportion of susceptible plants in the mixture. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Downloads

Published

1989-03-01

Issue

Vol. 37 No. 1 (1989)

Section

Papers

License

© Copyright KLV All rights reserved. The copyright covers the exclusive right to reproduce and distribute the contribution, including reprints, translations, photographic reproductions, microform, electronic form (offline, online), or any other reproductions of similar nature. The Author may publish his/her contribution on his/her personal Web page provided that he/she creates a link to http://library.wur.nl/ojs/index.php/njas and that together with this electronic version it is clearly pointed out, by prominently adding "© KLV", that the copyright for this contribution is held by KLV. The full-text version may be available from the Author's Web page only after a delay of 12 months following the publication of the paper, whereas such a delay is not required for the abstract.