| abstract |
According to the present invention there is provided an anti-plant viral agent that exerts a prophylactic and therapeutic effect on plant viral diseases. The anti-plant viral agent of the present invention is formula (I): [In formula (I), R < 1> ? R 4 each independently represents a hydrogen atom, —SO 3 H, —PO 3 H 2 , a glycosyl group, or —COR 11 , and R 11 represents an unsubstituted or substituted C1? 30 C2? An alkyl group or an unsubstituted or substituted group? 30 alkenyl group is shown. However, all R 1 ? R 4 is not a hydrogen atom at the same time.] At least one compound selected from the group consisting of ascorbic acid derivatives and salts thereof is characterized. |