caa a22 4500 465806546 CHVBK 20180323112105.0 cr unu---uuuuu 170327e19900401xx s 000 0 eng 10.1007/BF03053435 doi (NATIONALLICENCE)springer-10.1007/BF03053435 Production and viability of Peronospora parasitica in radish [Elektronische Daten] [P Jang, K Safeeulla] InPeronospora parasitica the inoculum load is found in the form of oospores in the leaf and seed tissues of radish. Out of 400 seeds tested, 10% showed the presence of oospores in the pericarp and 0·1% in the embryo. The 2,3,5-triphenyltetrazolium chloride test is a quick method of determining the viability of the oospores. Viability of oospores based on infection capacity after storage, though a long process, is effective and reliable. Results ofin vitro andin vivo experiments show that the oospores need natural weathering, under field conditions, for a period of one year for maximum infection in radish and those stored for two years under the same conditions, has an adverse effect on their infection capacity. Infection capacity was higher among oospores exposed to weathering than those retained in laboratory. Indian Academy of Sciences, 1990 Raphanus sativus nationallicence Peronospora parasitica nationallicence oospores production nationallicence viability nationallicence Jang P. Umtata, PO Box 59, Transkei, South Africa aut Safeeulla K. Downy Mildew Research Laboratory, Department of Applied Botany, University of Mysore, 570006, Manasagangotri, Mysore, India aut Proceedings: Plant Sciences Springer India 100/2(1990-04-01), 117-122 0370-0097 100:2<117 1990 100 12388 https://doi.org/10.1007/BF03053435 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF03053435 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jang P. Umtata, PO Box 59, Transkei, South Africa aut NATIONALLICENCE 700 1- Safeeulla K. Downy Mildew Research Laboratory, Department of Applied Botany, University of Mysore, 570006, Manasagangotri, Mysore, India aut NATIONALLICENCE 773 0- Proceedings: Plant Sciences Springer India 100/2(1990-04-01), 117-122 0370-0097 100:2<117 1990 100 12388 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer