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Effects of straw inoculum and fungicides on leaf blotch (Rhynchosporium secalis), growth and yield of winter barley

Published online by Cambridge University Press:  27 March 2009

J. F. Jenkyn ,
O. J. Stedman ,
G. V. Dyke  and
A. D. Todd
J. F. Jenkyn
Affiliation:
AFRC Institute of Arable Crops Research, Rothamsted Experimental Station, Harpenden, Herts AL5 2JQ
O. J. Stedman
Affiliation:
AFRC Institute of Arable Crops Research, Rothamsted Experimental Station, Harpenden, Herts AL5 2JQ
G. V. Dyke
Affiliation:
AFRC Institute of Arable Crops Research, Rothamsted Experimental Station, Harpenden, Herts AL5 2JQ
A. D. Todd
Affiliation:
AFRC Institute of Arable Crops Research, Rothamsted Experimental Station, Harpenden, Herts AL5 2JQ
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Summary

Five experiments in harvest years 1980–2 tested the effects of straw inoculum and fungicides on leaf blotch (Rhynchosporium secalis), growth and yield of winter barley. Inoculating plots with rhynchosporium-infected straw increased the rate of disease development and greatly decreased seedling growth but inoculating plots with wheat straw or sterilized barley straw had no effect. In 1982, plots inoculated with infected straw gave less grain than uninoculated plots, but in all years fungicide sprays applied in winter or early spring had mostly small effects on grain yield that were only poorly related to their effects on leaf blotch and seedling growth.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 112 , Issue 1 , February 1989 , pp. 85 - 95
Copyright
Copyright © Cambridge University Press 1989

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