First report of Globodera pallida in Japan
Until recently, the only species of potato cyst nematode know to occur in Japan was Globodera rostochiensis (EPPO A2 list). But in August 2015, mature Globodera females and cysts were observed on the roots of potatoes resistant to the Ro1 pathotype of G. rostochiensis in a field in Abashiri, Hokkaido. Females adhering to potato roots were white or pale yellow, and were clearly distinguishable from G. rostochiensis females, which are brilliant gold. Laboratory analysis (morphology, PCR-RFLP, sequencing) confirmed the presence of Globodera pallida. This is the first report of G. pallida in Japan. Pathotype identification and screening for resistance to G. pallida among potato cultivars in Japan are underway.
The situation of Globodera pallida in Japan can be described as follows: Present, first found in 2015 in a potato field in Hokkaido.
Sources
Narabu T, Ohki T, Onodera K, Fujimoto R, Itou K, Maoka T (2016) First report of the pale potato cyst nematode, Globodera pallida, on potato in Japan. Plant Disease 100(8), p 1794.