Abstract
Agronomic studies were conducted to examine the effect of fertilizer N on black point incidence in Fielder soft white spring wheat (Triticum aestivum L. em Thell.). Black point incidence rose with increases in the amount of N supplied either as fertilizer applied during the growing season in irrigation water or as soil N, specifically nitrate, from fertilizer N application in previous years. A comparison of four different irrigation regimes demonstrated that black point incidence was highest under frequent irrigation (irrigate to field capacity at 75% available moisture) and lowest under conventional irrigation (irrigate to field capacity at 50% available soil moisture). In each irrigation regime, disease incidence increased as N rates were raised from 0 to 120 kg ha-1. A residual fertilizer-N study demonstrated in 1985 and 1986 that black point incidence generally rose with increasing levels of nitrogen from either preplant applications in the spring or soil nitrate from the previous year. However, additions of fertilizer N were shown to slightly reduce black point incidence at soil nitrate levels above 150 kg ha-1. A two-year fertilizer N study demonstrated that in treatments receiving the same amount (90 kg ha-1) of fertilizer N, the amount broadcast as a preplant treatment versus the amount applied in irrigation water in a fertigation treatment had no effect on black point incidence, but all fertilized treatments had significantly higher levels of disease than the unfertilized check.
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References
Bole, J B and Dubetz, S 1986 Effect of irrigation and nitrogen fertilizer on the yield and protein content of soft white spring wheat. Can. J. Plant Sci. 66, 281–289.
Bremner, M 1965 Total nitrogen, and inorganic forms of nitrogen. In Methods of Soil Analysis. Part 2: Chemical and Microbiological properties. Ed. C A Black pp 1149–1237. Am. Soc. Agron., Madison, WI.
Canada Grains Council 1982 The soft white spring wheat industry in Canada. Canada Grains Council, Winnipeg, Man. pp 58–61.
Canadian Grain Commission 1983 Official Canadian grain grading guide. Canadian Grain Commission, Winnipeg, Man. 24 p.
Carefoot, J M, Bole, J B and Entz, T 1989 Relative efficiency of fertilizer N and soil nitrate at various depths for the production of soft white wheat. Can. J. Soil Sci. 69, 867–874.
Conner, R L 1987 Influence of irrigation timing on black point incidence in soft white spring wheat. Can. J. Plant Pathol. 9, 301–306.
Conner, R L 1989 Influence of irrigation and precipitation on incidence of black point in soft white spring wheat. Can. J. Plant Pathol. 11, 388–392.
Conner, R L and Kuzyk, A D 1988 Black point incidence in soft white spring wheat in southern Alberta and Saskatchewan between 1982 and 1987. Can. Plant Dis. Surv. 68, 27–31.
Conner, R L and Thomas, J B 1985 Genetic variation and screening techniques for resistance to black point in soft white spring wheat. Can. J. Plant Pathol. 7, 402–407.
Cromey, M G and Mulholland, R I 1988 Blackpoint of wheat: Fungal associations, cultivar susceptibility, and effect on grain weight and germination. N. Z. J. Agric. Res. 31, 51–56.
Draper, N R and Smith, H 1981. Applied regression analysis. 2nd ed. Wiley, New York. 709 p.
Dubetz, S 1961 Effect of soil type, soil moisture, and nitrogen fertilizer on growth of spring wheat. Can. J. Soil Sci. 41, 44–51.
Hagin, J and Tucker, B 1982 Fertilization of Dryland and Irrigated Soils. pp 147–153. Springer-Verlag, Berlin.
Huber, D M 1980 The role of mineral nutrition in defense. In Plant Disease: An Advanced Treatise. Vol. 5: How Plants Defend Themselves. Eds. J G Horsfall and E B Cowling., pp 381–406. Academic Press, New York.
Kilpatrick R A 1968 Factors affecting black point of wheat in Texas 1964–67. Texas Agric. Exp. Stn. Misc. Publ. 884. 11 p.
Large, E C 1954 Growth stages in cereals: Illustration of Feekes scale. Plant Pathol. 3, 128–129.
McKeague, J A 1976 Manual on Soil Sampling and Methods of Analysis. Soil Research Institute, Ottawa, Ont. 212 p.
Plotworkds Inc. 1989 PLOT88 Software Library Reference Manual. 3rd ed. Plotworks Inc., Ramona, CA. 956 p.
Rao, Y G and Bhardwaj, R B L 1981 Reduce yellow berry and black point incidence of wheat through nitrogen application. Indian Farming 31, 7.
Southwell, R J, Brown, J F and Wong, P T W 1980 Effect of inoculum density, stage of plant growth and dew period on the incidence of black point caused by Alternaria alternata in durum wheat. Ann. Appl. Biol. 96, 29–35.
Statistical Analysis System Institute Inc. 1985 SAS® User's Guide: Statistics. Version 5. SAS Institute Inc., Cary, NC. 956 p.
Steel, R G D and Torrie, J H 1980 Principles and Procedures of Statistics. 2nd ed. McGraw-Hill, Toronto, Ont. 633 p.
Waldron, L R 1934 Increase of kernel weight in common wheat due to black point disease. J. Agric. Res. 48, 1017–1024.
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Conner, R.L., Carefoot, J.M., Bole, J.B. et al. The effect of nitrogen fertilizer and irrigation on black point incidence in soft white spring wheat. Plant Soil 140, 41–47 (1992). https://doi.org/10.1007/BF00012805
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DOI: https://doi.org/10.1007/BF00012805