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WHEAT

Spring Wheat and Durum Yield and Disease Responses to Copper Fertilization of Mineral Soils

^a Dep. of Soil Science, 229 Walster Hall, Fargo, ND 58105
^b Dep. of Plant Pathology, North Dakota State Univ., Fargo, ND
^c 1321 141/2 St. S, Fargo, ND

^* Corresponding author (david.franzen{at}ndsu.edu).

Copper deficiency has been linked to the incidence of a number of wheat diseases. Canadian research on mineral soils has suggested that low Cu availability, as indicated in a DTPA extraction soil test, combined with low soil organic C and coarse textures may also result in Cu deficiency of cereals. The objective of this study was to determine the yield responses of spring wheat (Triticum aestivum L.) and durum [T. turgidum subsp. durum (Desf.) Husn.] to Cu fertilization, and to determine whether wheat leaf rust (Puccinia triticina Roberge ex Desmaz f. sp. tritica), tan spot [Pyrenophora tritica-repentis (Died.) Dreschler], and Fusarium head blight (Fusarium graminearum Schwabe) incidence and severity would be reduced with these treatments. Experiments were established from 1998–2000 on 17 spring wheat sites and three durum wheat sites throughout North Dakota. Disease ratings were recorded at 10 sites.

Abbreviations: DTPA, diethylene triamine pentaacetic acid • EDTA, ethylene diamine tetraacetic acid

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Received for publication June 6, 2007.