Notes on powdery mildews (Erysiphales) in Japan: IV. Phyllactinia, Parauncinula and Sawadaea

Abstract New records of Phyllactinia , Parauncinula and Sawadaea species (Erysiphales) in Japan are reported with morphological and molecular data, including the first discovery of Ph. actinidiae-latifoliae in Japan, and the first Japanese record of Ph . pyri-serotinae on Aria alnifolia , Pa. septata on Quercus variabilis and Q. robur , and Sa. polyfida on Acer australe . In addition, Phyllactinia collections of K. Sawada deposited in TNS were re-examined and some of them were designated as lectotypes or syntypes.