Integrated Control Protocol to Mitigate and Eradicate Ink Disease in Chestnut Orchards

Ink disease caused by Phytophthora spp. represents a serious emergence in chestnut groves in Italy. On the basis of acquired knowledges, an integrated control protocol has been elaborated and applied in affected orchards in Central Italy. It implies, the use of potassium phosphite as inhibitor of Phytophthora spp. and inducer of acquired resistance in chestnut; the use of classical copper compounds or systemic fungicides to stop the inoculum spread; the hydrology restoration and watersheld management to avoid inoculum spread via flowing water; public awareness through appropriate behaviour in entering and exit infected areas. Evaluation of efficacy of the integrated protocol has been carried out by monitoring inoculum consistency and patterns of disease spread.