Abstract
The present paper presents the rationale for the use of pathogen surveys, inoculated and non-inoculated disease nurseries and varietal resistance characteristics in an integrated approach to control wheat yellow rust in Denmark. The non-inoculated disease observation plots, which gave valuable information about yellow rust at the year, site and variety level, served as the primary sample source for the pathogen survey revealing pathogen virulence dynamics. This survey was also the main source for isolates of new pathotypes, a prerequisite for the assessment of the resistance characteristics of varieties and breeding lines in inoculated nurseries, and the postulation of race-specific resistance genes. A simple grouping of varieties into four categories with respect to resistance to the current yellow rust population proved robust, and this grouping was used as a determinant in a web-based decision support system for pesticide applications in cereals, Crop Protection On-line (CPO). The interplay between the different research and survey activities in the integrated pest management (IPM) approach demonstrated the need for a coherent and long-term involvement at all stages from plant breeding to the official variety approval system, extension service and research in disease epidemiology and resistance genetics.
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Acknowledgement
Access to high quality disease assessments from disease observation plots across multiple locations and years by S. Sindberg and colleagues, The Danish Plant Directorate, Tystofte, is greatly acknowledged, as well as valuable comments from L. N. Jørgensen, Flakkebjerg, on the Danish Pesticide Action Plan and the CPO-threshold values.
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Hovmøller, M.S., Henriksen, K.E. Application of pathogen surveys, disease nurseries and varietal resistance characteristics in an IPM approach for the control of wheat yellow rust. Eur J Plant Pathol 121, 377–385 (2008). https://doi.org/10.1007/s10658-008-9303-4
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DOI: https://doi.org/10.1007/s10658-008-9303-4