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The reaction of two spring wheat varieties exposed to epidemics of Septoria nodorum and S. tritici of varying intensity and duration

Published online by Cambridge University Press:  27 March 2009

D. G. Jones  and
R. D. W. Rowling
D. G. Jones
Affiliation:
Department of Agricultural Botany, University College of Wales, Aberystwyth, Dyfed.
R. D. W. Rowling
Affiliation:
Department of Agricultural Botany, University College of Wales, Aberystwyth, Dyfed.
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Summary

Two spring wheat varieties, Cardinal and Kolibri, were inoculated with Septoria nodorum Berk and S. tritici Rob. & Desm. at Growth Stages 3, 7, 10.1 and 10.5 of the Feekes' scale. The treatments included single inoculations at each growth stage and multiple inoculations at 2, 3 and 4 of the above growth stages.

Thousand-grain weights of both varieties were reduced by inoculation with either pathogen, S. nodorum causing the largest reduction. Numbers of grain per head in Cardinal were severely reduced by S. nodorum, particularly after the multiple inoculations. In Kolibri, there was evidence of increases in numbers of grain with S. tritici inoculation which nullified the grain size reductions. The results are discussed in relation to compensatory mechanisms and disease tolerance.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 87 , Issue 2 , October 1976 , pp. 401 - 406
Copyright
Copyright © Cambridge University Press 1976

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