First report of American plum line pattern virus in Japan
In late spring 2015, several flowering cherry trees (Prunus serrulata) showing conspicuous yellowish oak-leaf patterns on their leaves were observed in the Kyoto and Nara prefectures, Japan. Samples were collected from 3 symptomatic trees and tested (sequencing, NGS). Results confirmed the presence of American plum line pattern virus (Ilarvirus, APLPV – EPPO A1 List) in the 3 symptomatic samples. According to NGS data, all samples were also infected by Cherry virus A and Little cherry virus 2 (EU Annexes). The samples from Kyoto additionally contained Cherry necrotic rusty mottle virus and Plum bark necrosis stem pitting-associated virus. This is the first time that APLPV is reported from Japan. It is noted that further studies are needed to evaluate the prevalence of APLPV and its impact on P. serrulata.
The situation of American plum line pattern virus in Japan can be described as follows: Present, only in some areas (first found in 2015 in 3 samples of Prunus serrulata from Kyoto and Nara prefectures).
Candresse T, Faure C, Theil S, Marais A (2017) First report of American plum line pattern virus infecting flowering cherry (Prunus serrulata) in Japan. Plant Disease 101(8), p 1561.