The Infection Court of Faba Bean Seedlings for Oospores of Peronospora viciae f.sp. fabae in Soil |
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| Authors: | D J van der Gaag H D Frinking |
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| Institution: | Swedish University of Agricultural Sciences, Plant Pathology and Biological Control Unit, PO Box 7044, S-750 07 Uppsala, Sweden;Department of Phytopathology, Wageningen Agricultural University, PO Box 8025, 6700 EE, The Netherlands |
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| Abstract: | The infection court of Faba bean seedlings for oospores of Peronospora viciae f.sp. fabae in soil was determined. Soil naturally infested with oospores was placed as 3-cm thick layers at four different depths relative to Faba bean seeds. Seedlings with downy mildew were obtained only from seeds sown in the middle of a 3-cm layer of oosporeinfested soil. No infection was obtained from oosporeinfested soil placed more than 1.5 cm above or below seeds. Histological observations showed that the hypocotyl and first part of the main root were the most probable sites of infection. |
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