[1993 regional strategies for fungicide utilisation in cereal crops [South-West area (France)]]

aquitaine aquitania cereal crops chemical control control de enfermedades costos costs crop losses crop yield cultivos de cereales disease control enfermedades fungosas farm inputs fongicide fungal diseases fungicidas fungicides insumos agricolas lutte chimique maladie fongique midi pyrenees midi-pyrenees moyen de production agricole profitability rendement des cultures rendimiento de cultivos rentabilidad triticum triticum aestivum