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

• New records of Phyllactinia, Parauncinula and Sawadaea species in Japan are reported.
• Phyllactinia actinidiae-latifoliae is the first discovery in Japan.
• Phyllactinia pyri-serotinae is first recorded on Aria alnifolia.
• Parauncinula septata is first recorded on Quercus variabilis and Q. robur.
• Sawadaea polyfida is first recorded on Acer australe.

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.