, Integrated management of Papaya ringspot virus (PRSV) in Peru
, Agdia Inc., IN, USA. E-mail: j.tenorio@cgiar.org, s.fuentes@cgiar.org, i.barker@cgiar.org, lsalazar@agdia.com PP-3_90: Ageratum enation virus causes yellow vein disease of Sonchus oleraceus Muhammad Tahir 1 , Faiza Saleem 1 , Deeba Noreen Baig 1 , Muhammad Saleem Haider 1 , Naeem Rashid 1 , Javed Iqbal 1 , Muhammad Akhtar 1 , Rob W. Briddon 2 1 School of biological Sciences, vol.3
, E-mail: gullsbs@yahoo.com PP-4_103: Pepino mosaic virus: variability in strains R.A.A. van der Vlugt and Robert van der Meer Plant Research International BV, P.O. Box, vol.16
, Effectiveness of known resistance genes to a rym5 resistance breaking German BaMMV strain
, Institute of Epidemiology and Resistance Resources, 2 Institute of Resistance Research and Pathogen Diagnostics, Erwin-Baur-Straße 27, D-06484 Quedlinburg; 3 Institute of Agricultural Crops, Rudolf-Schick-Platz 3a, D-18190 Groß Lüsewitz
, At the three-leaf-stage plants were inoculated two times at an interval of 5 to 7 days using sap of leaves of cv. ´Tokyo´ infected with BaMMV-Teik or BaMMV-Tasl. Leaves were homogenised on ice in K 2 HPO 4 buffer (1:10; 0.1 M; pH 9.1) and silicium carbide (caborundum, mesh 400, 0.5 g/25 ml sap) was added. Five weeks after the first inoculation the number of plants with mosaic symptoms was scored and DAS-ELISA was carried out. The new BaMMV-isolates were transmitted successfully to cv. 'Tokyo' and additional cultivars carrying rym5 ('Anastasia', 'Kamoto', 'Kyoto' 'Resistant Ym No. 1') and also to cv. 'Hiberna' carrying rym10 encoding resistance to BaYMV-1 and -2 but susceptibility to the original BaMMV-isolate, On the other hand genotypes with the resistance genes rym1+rym5, Rym2, rym4, rym7, rym8, rym9, rym11, rym12, Rym14 Hb , rym15 and Rym16 Hb could not be infected by BaMMV-Teik or BaMMV-Tasl, respectively. Furthermore, 20 accessions of the genebank of the Institute of Plant Genetics and Crop Plant Research (IPK), vol.544267, 2005.
, Aphid vectors and transmission of Potato virus Y strains
, Box 16, 6700 AA Wageningen, The Netherlands; 2 Nederlandse Algemene Keuringsdienst (NAK), P.O. Box 1115, vol.8300