Special Report No.15 Editor H.T.A.M. Schepers Special Report No.15 Proceedings of the Thirteenth EuroBlight Workshop St. Petersburg, Russia 9 - 12 October 2011 PPO 498 PPO 498 AARHUS AU UNIVERSITY PPO-Special Report no. 15 July 2012 H.T.A.M. Schepers (editor) PPO-Special Report from no. 8 onwards: ISSN 1569 - 321X PPO-Special Report from no’s. 1,2,3,4,5,6,7: ISSN 1386 - 3126 Applied Plant Research (Praktijkonderzoek Plant & Omgeving, PPO) part of Wageningen UR, is the ultimate knowledge institute for arable Farming, Multifunctional Agriculture and Field Production of Vegatables. July 2012 PPO no. 498 AARHUS AU UNIVERSITY Colofon © 2012 Wageningen, DLO Foundation All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of the DLO Foundation, Praktijkonderzoek Plant & Omgeving (Applied Plant Research), Business Unit Arable Farming, Multifunctional Agriculture and Field Production of Vegatables. The Foundation DLO is not responsible for any damage caused by using the content of this report. PPO Publication no. 498; at € 30,- The thirteenth workshop and proceedings were sponsored by the companies: BASF, Bayer CropScience, Belchim, Gowan, Nufarm, Dow AgrosSciences, DuPont, Germicopa, Syngenta, HZPC and ISK Bioscience. Growing with our potatoes Applied Plant Research (Praktijkonderzoek Plant & Omgeving, PPO) part of Wageningen UR, is the ultimate knowledge institute for arable Farming, Multifunctional Agriculture and Field Production of Vegatables. Address: P.O. Box 430, NL-8200 AK Lelystad, The Netherlands Tel. +31 320 291 111 Fax +31 320 230 479 Email: [email protected] Internet: www.ppo.wur.nl Preface EuroBlight Workshop St Petersburg, Russia 9-12 October 2011 A European network of scientists and other specialists working on potato early and late blight meet every 18 months. The network combines two previous networks originating from European Concerted Actions and has 150 members. • EU.NET.ICP: “European network for development of an integrated control strategy of potato late blight” (1996-2000). Coordinated by Huub Schepers • EUCABLIGHT: “A potato late blight network for Europe” (2003-2006). Coordinated by Alison Lees. The 13th Workshop was hosted by N.I. Vavilov Research Institute of Plant Industry, St Petersburg, Russia. The Workshop was attended by 91 persons from 20 European countries, Russia, Israel, Chile, Argentine and United States of America. Representatives from all countries presented information on the late blight epidemic in 2010 and 2011and recent research results regarding integrated control, decision support systems, resistance of varieties and population biology of the late blight pathogen in potatoes. Since early blight is an increasing problem in Europe reports on this disease are also included. The papers and posters presented at the Workshop and discussions in the subgroups are published in these Proceedings, PPO-Special Report no. 15. The current and previous Proceedings are also available on the EuroBlight website www.EuroBlight.net. EuroBlight Coordinators: Alison Lees, The James Hutton Institute (UK) Jens G. Hansen, Aarhus University (DK) Huub Schepers, Wageningen University (NL) For further information please contact the network secretariat where also additional copies of this Proceedings can be ordered. Secretariat PPO-AGV Lelystad Att. H. Schepers PO Box 430 NL-8200 AK Lelystad The Netherlands Telephone: + 31 (0) 320 291111 Telefax: + 31 (0) 320 230479 E-mail: [email protected] Internet: www.ppo.wur.nl 3 4 Table of contents Papers .................................................................................................................................... 9 The development and control of Late Blight Phytophthora( infestans) in Europe in 2010 and 2011 Jens Grønbech Hansen, Björn Anderson, Ruairidh Bain & Alison Lees, Faye Ritchie, Guntis Gulbis, Steven Kildea, Louise Cooke, Ludovic Dubois & Catherine Chatot, Alexey Filippov, Asko Hannukkala, Hans Hausladen, Ervin Hausvater, Jan Heldak & Peter Vrabcek, Arne Hermansen & Ragnhild Nærstad, Jozefa Kapsa, Mati Koppel, Tomke Musa, Antanas Ronis, Huub Schepers & Kees Vogelaar, Pieter van Haverbeke ................................................................11 The population structure of Phytophthora infestans in the Netherlands during the years 2000 - 2009 Trudy van den Bosch, Ying Li, Bert Evenhuis, Marieke Förch, Theo van der Lee and Geert Kessel ...................................................................................................................................31 Making Sense of Phytophthora infestans diversity at national and international scales David E. L. Cooke, Alison K. Lees, Poul Lassen & Jens Grønbech Hansen ..................................37 Fortuna et al. Status and perspectives of GM approaches to fight late blight Thorsten Storck, Timo Böhme & Holger Schultheiss ....................................................................45 Late blight resistance of Solanum species and potato hybrids: the evidence from coupled phytopathological and molecular study Elena Rogozina, Maria Patrikeeva, Maria Kuznetsova, Svetlana Spiglazova, Irina Kozlovkaya, Tatiana Smetanina, Artem Pankin, Maria Beketova, Ekaterina Sokolova, Elena Kinash, Polina Drobyanzina, Kenneth Deahl, Richard Jones and Emil Khavkin .................................................49 Broad spectrum late blight resistance in potato differential set plants MaR8 and MaR9 is conferred by multiple stacked R genes H.J. Kim, H.R. Lee, K.R. Jo, S.M.M. Mortazavian, D.J. Huigen, A. Evenhuis, G.T.J. Kessel, R.G.F. Visser, E. Jacobsen, J.H. Vossen .........................................................................................55 Characterization of Phytophthora infestans populations in North America from the 2009-2011 late blight epidemics K. L. Deahl ....................................................................................................................................57 Analysis of correlation between soil moisture and late blight occurrence Jeanette Jung, Beate Tschöpe & Benno Kleinhenz ........................................................................59 Analysis of volunteer density under the influence of cropping practices: a contribution to the modelling of primary inoculum of Phytophthora infestans in potato crops T. Rakotonindraina, R. Corbiere, C. Chatot, V. Pinchon, L. Dubois, F. Aurousseau, J.E. Chauvin & J.N. Aubertot ......................................................................................................67 5 Ongoing changes in the Irish potato late blight population L.R. Cooke, S. Kildea, J. Mehenni-Ciz, L. Quinn, G. Little, F. Hutton, F. M. Perez, K. L. Deahl & D. Griffin...............................................................................................................75 Strengthening Management of New Late Blight Genotypes in the North Central USA Gary Secor, Viviana Rivera, Asunta Thompson & Neil Gudmestad ..............................................81 An IPM2.0 Control strategy for Potato late blight based on cultivar resistance and monitoring of virulence in the local P. infestans population G.J.T. Kessel, A. Evenhuis, G.B.M. Van den Bosch, G.A. Hoekzema, L. Bosman, C.G. Topper, L.J. Esselink, M.P.E. van Gent-Peltzer, T.A.J. van der Lee and H.T.A.M. Schepers ..................... 87 Early outbreak of potato late blight in Denmark 2011 Bent Nielsen, Bødker, Lars & Hansen, G. Jens..............................................................................93 Disease-orientated threshold values as tool for effective early blight control Juergen Leiminger & Hans Hausladen ......................................................................................... 99 Host-pathogen interaction between Alternaria species and S.tuberosum under different conditions Józefa S. Kapsa, Jerzy Osowski ....................................................................................................107 Genetic structure of Alternaria solani - a new approach Eva Edin, Firuz Odilbekov, Larisa Garkava-Gustavsson & Erland Liljeroth ...............................113 Ranman Top, again a step forwards in late blight control Johan Desnouck, Jos Testers, Clement Versmissen ...................................................................... 115 Recommendations and field performance of Initium® based products against Phytophthora infestans in potato Vanessa Tegge, Tobia Erven, Eric Kiers, Marja Kruts, Angus Murray, Horst-Dieters Brix ..........119 Revus Top, A new product for the control of P. infestans and Alternaria in potatoes in Europe Jan Bouwman, Caroline Strypenstein, Frank Meier-Runge & Frederico Gonzalez .....................123 Report of the Fungicide Subgroup meeting on 11 & 12 October 2011: Discussion of potato blight fungicides, their properties and ratings Ruairidh A. Bain .........................................................................................................................131 Development of foliar late blight (Phytophthora infestans) in relation to cultivar resistance and fungicide dose on potato Ruairidh A. Bain, Faye Ritchie, Alison Lees, Chris Dyer and Adrian Roberts ............................139 Characterization of Phytophthora infestans population in Chile I. Acuña, B. Sagredo, M. Gutiérrez, C. Sandoval, A. Fahrenkrog, G. Secor, V. Rivera and S. Mancilla ............................................................................................................145