Helminthosporium blights of wheat: Spot blotch and Tan spot

argentina argentine asia asia meridional asie asie du sud australia australie bangladesh belgique belgium bipolaris bolivia bolivie canada cercosporiose china chine control de enfermedades cropping systems cultivos de primavera culture de printemps diagnosis diagnostic disease control disease resistance enfermedades de las plantas experimentation fitomejoramiento helminthosporium hongrie hungary hungria inde india inoculation maladie des plantes manchas manitoba maroc marruecos mexico mexique molecular genetics morocco nepal paraguay pathogens plant breeding plant diseases projet de recherche reino unido research projects resistencia a la enfermedad selection sistemas de cultivo south asia spots spring crops toxinas toxine toxins trigo triticum united kingdom uruguay viet nam vietnam wheats yemen