甜菜须根病最初(1965年)发生于日本制糖公司的连作试验区的部分田中。当时不了解发生原因,认为是连作所引起的症状之一,于是称为甜菜连作障害症或甜菜异常生育症。其后1966年证实,在非连作的甜菜地也有发生。1969——1970年在北海道各地的甜菜中有很多零星发生,此病成为甜菜种植的重要问题。 Beet root disease first occurred (1965) in a portion of Tanaka, a continuous cropping trial of Japanese sugar companies. At that time, I did not understand the cause of the accident and considered it to be one of the symptoms caused by continuous cropping. Therefore, it was called beet continuous cropping disorder or abnormal beet fertility disorder. It was later confirmed in 1966 that non-interlaced beets had also occurred. In 1969-1970, there were many sporadic beet species in various parts of Hokkaido, which became an important issue for beet cultivation.