Occurrence of viral disease of cucumber in greenhouse in Osaka Prefecture and reduction of damage due to Zucchini yellow mosaic viral infection by light interception and vaccination

Abstract

Mosaic diseases and wilt are caused by viral infections, and cause loss of cucumber yield. It is a serious problem for cucumber cultivation in Japan. In Osaka prefecture, the main virus type detected in cucumber plants with the disease symptoms was Zucchini yellow mosaic virus (ZYMV). Greenhouse shade treatment reduced the temperature differences between sunny and cloudy or rainy days and occurrence of wilt symptoms caused upon ZYMV inoculation. The result supported the hypothesis that wilting caused by viral infection was probably induced by drastic changes in temperature from cloudy or rainy days to clear sunny days. The combined use of CUBIO ZY-02 (ZYMV vaccine) and greenhouse shading prevented the reduction in cucumber yield, due to ZYMV infection, from the nursery stage.