First Report of Root Rot Caused by on alder () in Spain.

Alder decline caused by Phytophthora species is considered one of Europe´s most important diseases of natural ecosystems. In Spain, P. x alni, P.

First report of causing chestnut brown rot on nuts and burrs of sweet chestnut in Spain.

About 60% of the nut production of sweet chestnut ( Mill.) in Europe originates in Spain (FAOSTAT, 2022), mostly (91%) in Galicia (NW Spain). In September 2021, premature fall of immature chestnut burrs and nuts of was observed in eight orchards of Pontevedra and Ourense (provinces of Galicia).