Powdery mildew of balsam pear (Momordica charantia L.) caused by Podosphaera xanthii in Japan

In March 2012, powdery mildew was found on balsam pear (Momordica charantia L.) in Okinawa, Japan. No cleistothecia were observed. The associated fungus was identified as Podosphaera xanthii using morphological characteristics of the anamorph and molecular analysis of ITS regions. Podosphaera xanthii is proposed as another pathogen of powdery mildew on balsam pear in Japan.