Abstract
Three types of leaf spots of kiwifruit (Actinidia deliciosa) have been found in Kanagawa Prefecture since 1981. Two species of Pestalotiopsis, which were frequently isolated from brown zonate symptom, were identified as P. longiseta (Spegazzini) Dai et Kobayashi and P. neglecta (Thümen) Steyaert, respectively. Since they showed pathogenicity on kiwifruit, this symptom was named as Pestalotia disease. From the brown circular or silver gray symptom, two species of Colletotrichum were frequently isolated and identified as C. acutatum Simmonds and C. gloeosporioides (Penz.) Penz. et Saccardo, respectively. The second type of the symptom was named as Anthracnose. From angular leaf spot symptom, Phomopsis sp. which had pathogenicity on kiwifruit was abundantly isolated and the symptom was named as Angular leaf spot. These pathogens were also isolated from the brown circular symptom found on the leaves of Actinidia arguta and confirmed their pathogenicity on kiwifruit and A. arguta.
