Sooty spot of kiwifruit caused by Pseudocercospora actinidiae Deighton

Leaf spots on the lower leaf surface and sunken spots on the fruit of kiwifruit (Actinidia deliciosa and A. chinensis) were found in Fukuoka Prefecture, Japan. The observed fungus was identified as Pseudocercospora actinidiae Deighton. We propose the name sooty spot of kiwifruit (“susuhan-byo” in Japanese) as a new disease fullfilling Koch’s postulates.