Losses caused by Pyrenochaeta glycines on soyabean in Nigeria

benomilo benomyl chemical control control de enfermedades crop losses cultivars disease control enfermedades de las plantas enfermedades fungosas fongicide fungal diseases fungicidas fungicides glycine max losses lutte chimique maladie des plantes maladie fongique pathogens perte plant diseases rendement rendimiento soja soybeans variedades varieties yields