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Results from two barley experiments at Saxmundham, Suffolk, measuring effects of the fungicide benodanil on three varieties, given three amounts of nitrogen at two times 1973–4

Published online by Cambridge University Press:  27 March 2009

F. V. Widdowson ,
J. F. Jenkyn  and
A. Penny
F. V. Widdowson
Affiliation:
Bothamsted Experimental Station, Harpenden, Hertfordshire, AL5 2JQ
J. F. Jenkyn
Affiliation:
Bothamsted Experimental Station, Harpenden, Hertfordshire, AL5 2JQ
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Summary

Midas, a barley variety very susceptible to brown rust (Puccinia hordei), and two less susceptible varieties (Julia and Mazurka) were given three amounts of nitrogen (50, 100 or 150 kgN/ha) either at sowing (in March), in May, or half at each time. Benodanil sprays were applied to one half of each plot in June and again in July to control brown rust. Brown rust became more severe in 1973 than in 1974 and was most severe on Midas with 150kgN/ha. In 1973, there was most brown rust where all or part of the nitrogen was applied in May, but in 1974 there was least brown rust where all the nitrogen was applied in May, probably because dry weather limited its uptake.

In 1973, when ample rain fell in spring and summer, grain yield was increased more by nitrogen given in May than in March, especially when benodanil was given. In 1974, little rain fell until July and then March nitrogen increased grain yield most whether or not benodanil was given. Top dressing of N (in May) produced a smaller straw yield than seed-bed dressing did in each year.

Benodanil spray much decreased brown rust and increased yield of grain, but not of straw; the increase was greater in 1973 than in 1974, when brown rust was less abundant. Benodanil increased yields of all varieties, but that of the rust susceptible variety, Midas, most. Benodanil increased grain yield more, as more N was given to the barley, and more with N given in May than in March. It increased the amount of N removed by the barley grain, but not by the straw.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 86 , Issue 2 , April 1976 , pp. 271 - 280
Copyright
Copyright © Cambridge University Press 1976

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References

Anon. (1972). Guide for the assessment of cereal diseases. Ministry of Agriculture, Fisheries & Food, Agricultural Development & Advisory Service. Plant Pathology Laboratory, Harpenden.Google Scholar
Cooke, G. W. & Williams, R. J. B. (1972). Problems with cultivations and soil structure at Saxmundham. Rothamsted Experimental Station Report for 1971, Part II, 122–42.Google Scholar
Frost, A. J. P., Jung, K. U. & Bedford, J. L. (1973). The timing of application of benodanil (BAS 3170F) for the control of cereal rust diseases. Proceedings 7th British Insecticide Fungicide Conference 1, 111–18.Google Scholar
Herbert, T. T., Rankin, W. H. & Middleton, G. K. (1948). Interaction of nitrogen fertilization and powdery mildew on yield of wheat. Phytopathology 38, 569–70.Google Scholar
Lancashire, J. A. & Latch, G. C. M. (1970). The influence of nitrogenous fertiliser on the incidence and effects of crown rust (Puccinia coronata Corda) in two ryegrass cultivars. New Zealand Journal of Agricultural Research 13, 287–93.CrossRefGoogle Scholar
Large, E. C. (1954). Growth stages in cereals. Illustration of the Feekes scale. Plant Pathology 3, 128–9.CrossRefGoogle Scholar
Last, F. T. (1953). Some effects of temperature and nitrogen supply on wheat powdery mildew. Annals of Applied Biology 40, 312–22.CrossRefGoogle Scholar
Simkin, M. B. & Wheeler, B. E. J. (1974). The development of Puccinia hordei on barley cv Zephyr. Annals of Applied Biology 78, 225–35.CrossRefGoogle Scholar
Widdowson, F. V., Penny, A. & Flint, R. C. (1972). Times and amounts of N for barley at Saxmundham. Rothamsted Experimental Station Report for 1971, Part I, 56–7.Google Scholar
Williams, R. J. B. & Cooke, G. W. (1971). Results of the Rotation I experiment at Saxmundham, 1964–69. Rothamsted Experimental Station Report for 1970, Part II, 68–96.Google Scholar
Williams, R. J. B. (1971). The chemical composition of water from land drains at Saxmundham and Woburn, and the influence of rainfall upon nutrient losses. Rothamsted Experimental Station Report for 1970, Part II, 36–67.Google Scholar