Spatial distribution of Aphanomyces euteiches inoculum in a naturally infested pea field

• Published in: European journal of plant pathology Vol. 123; no. 2; pp. 153 - 158
• Main Authors: Moussart, Anne, Wicker, Emmanuel, Le Delliou, Bernard, Abelard, Jean-Marie, Esnault, Robert, Lemarchand, Emile, Rouault, François, Le Guennou, Frédéric, Pilet-Nayel, Marie-Laure, Baranger, Alain, Rouxel, Francis, Tivoli, Bernard
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : Springer Netherlands 01-02-2009; Springer Netherlands; Springer; Springer Nature B.V; Springer Verlag
• Subjects: Agriculture; Biological and medical sciences; Biomedical and Life Sciences; disease severity; Ecology; Epidemiology; Fundamental and applied biological sciences. Psychology; Horizontal and vertical distribution; Inoculum potential; Life Sciences; Peas; Phytopathology. Animal pests. Plant and forest protection; Plant diseases; Plant Pathology; Plant Sciences; Soil microorganisms; Soilborne disease; Spatial distribution; Vegetal Biology; Vertical distribution; Inoculum potential; Disease severity; Soilborne disease; Horizontal and vertical distribution; Plant pathology; Microbiology; Plant pathogen; Grain legume; Leguminosae; Dicotyledones; Pisum sativum; Angiospermae; High protein crop; Spermatophyta; HORIZONTAL AND VERTICAL DISTRIBUTION; INOCULUM POTENTIAL; SOILBORNE DISEASE; DISEASE SEVERITY
• ISSN: 0929-1873; 1573-8469
• DOI: 10.1007/s10658-008-9350-x

The main objective of the study was to describe the horizontal and vertical distribution of Aphanomyces root rot in a naturally infested pea field. Measurements of inoculum potential clearly indicated a horizontal distribution of inoculum among several foci in the field, these foci differing in size and disease intensity. A highly significant relationship was observed between disease severity on plants during the cropping season and soil inoculum potential. In terms of the vertical distribution of inoculum in the soil, detection was maximal at a depth of 10 to 40 cm, but inoculum was detected down to a depth of 60 cm. Generally, inoculum potential was lowest for the layers at depths of 0 to 10 and 50 to 60 cm. Inoculum distribution and the value of the methodologies used are discussed in terms of possible use for epidemiology and disease forecasting.