[Fire blight - the situation is going better [Pyrus communis L. - Emilia-Romagna]]

bacteriose bacterioses bacteriosis batteriosi chemical control control cultural control de enfermedades controllo colturale controllo delle malattie copper sulphate cultural control disease control disease surveys emilia romagna encuestas sanitarias enfermedades de las plantas epidemiologia epidemiologie epidemiology erwinia amylovora indagini sulle malattie lutte chimique lutte culturale maladie des plantes malattie delle piante plant diseases pyrus communis sintomi solfato di rame sulfate de cuivre sulfato de cobre symptome symptoms