[Bacterial fire blight, controlled risk [Pyrus - Italy]]

agricultural warning services analyse microbiologique avertissement agricole bacteriose bacterioses bacteriosis batteriosi choice of species control de enfermedades controllo delle malattie damage danno disease control erwinia amylovora infection infezione italia italie italy legislation legislazione microbiological analysis pyrus riesgo rischio risk risque servizi di allarme agricoli sintomi symptome symptoms