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Symposium on Sunflower Downy Mildew, Fargo, ND USA, 1998

Foreword

Index
Session I : Races of downy mildew

l. Survey of downy mildew on sunflower in France
Annette Penaud, CETIOM, France .....8
2. Analysis of molecular variability in Plasmopara halstedii, causal agent of sunflower downy mildew. Use for the characterization of the species and its different racesJeanne Tourvieille, Patricia Roeckel-Drevet, Paul Nicolas et Denis Tourvieille de Labrouhe, INRA, France......... 12
3. Races of sunflower downy mildew pathogen (Plasmopara halstedii) in Yugoslavia
Stevan Masirevic, Yugoslavia..... 21
4. Research on Plasmopara halstedii : recent findings and further needs
Ferenc Viranyi, Hungary.......... 24
5. Pathogenic characterization of Plasmopara halstedii isolates from Spain
Leire Molinera-Ruiz, Melero-Vara, Spain............26
6. Pathogenic variability in Plasmopara halstedii in Western Canada
Khalid Y. Rashid, Canada......... 30
7. Review of Plasmopara halstedii. Races present in Argentina
Eugenia Bazzalo, Patricia Dimarco, A. Leon, Argentina..........34
8. History of downy mildew on sunflower in Brazil
Regina M.V.B.C. Leite, Marcelo F. Oliveira, Vania B.R. Castiglioni, Brazil..........36
9. Perspectives of downy mildew spreading in Brazil
Maria Regina Ungaro, R. R. Alfonsi, N.P. Calvet, Brazil ........ 38

Session II : Chemical and biological control

10. Protocol to evaluate the metalaxyl sensitivity level in isolates of Plasmopara halstedii 
Jean-Marc Albourie, Jeanne et Denis Tourvieille de Labrouhe, France.......... 44
11. Metalaxyl resistance in French isolates of downy mildew. Resistance to metalaxyl seed treatment in Plasmopara halstedii
Jean-Marc Albourie, Jeanne et Denis Tourvieille de Labrouhe, France ..........52
12.Metalaxyl resistance in French isolates of downy mildew. Sunflower mildew.Laboratory studies of the efficiency of some compounds against primary and secondary infections
S.Lafon, M. Delos, P. Gay, Denis Tourvieille de Labrouhe, France.... 62
13. Managing metalaxyl-resistance in Plasmopara halstedii from a chemical company perspective
Kiran Shetty,USA......... 74
14. Integrating biocontrol agents with chemical seed treatments for resistance management
R.B. Scott, USA.........79

Session III : Managing Downy Mildew from a Seed Company Perspective
Panel discussion by breeders from five seed companies (unpublished discussion)

Session IV : Downy Mildew Resistance

15. Analysis and location of sunflower downy mildew resistance genes
Felicity Vear, Joël Milon, Jacqueline Philippon, Saïd Mouzeyar, Paul Nicolas, Denis Tourvieille de Labrouhe, France ..........84
16. Cloning of molecular markers for disease resistance in sunflower Helianthus annuus L.
L. Gentzbittel, Felicity Vear, Saïd Mouzeyar, S. Badaoui, Paul Nicolas, Denis Tourvieille de Labrouhe, France.....94
17. Mapping downy mildew resistance in sunflower
Lutz Brahm, Thomas Röcher, Renate Horn, Markus Prüfe, Heike Köhler, Wolfgang Friedt, Germany......... 103
18. Resistance in commercial sunflower hybrids to races of downy mildew (Plasmopara halstedii)
Tom J. Gulya, USA..........111
19. Wild Sunflower as a potential source of resistance to downy mildew
Gerald Seiler, USA..........113
20. Neutron irradiation in plant breeding
Wally Valdivia-Granda, Peru........ 122
21. Proposal for standardized nomenclature and identification of races of Plasmopara halstedii (sunflower downy mildew)
Tom J. Gulya, USA, Denis Tourvieille de Labrouhe, France, Stevan Masirevic, Yugoslavia, Annette Penaud, France, Khalid Rashid, Canada and Ferenc Viranyi, Hungary