Influence of crop growth and structure on the risk of epidemics by Mycosphaerella graminicola (Septoria tritici) in winter wheat

abonos nitrogenados crecimiento croissance cultivos de invierno culture d'hiver enfermedades de las plantas enfermedades fungosas epidemia epidemics epidemie epidemiologia epidemiologie epidemiology fungal diseases growth maladie des plantes maladie fongique mycosphaerella graminicola nitrogen fertilizers pathogens plant diseases riesgo risk risque trigo triticum triticum aestivum variedades varieties wheats winter crops