date:Sep 23, 2021
m's base turns black and dies. Rain or other factors can spread the disease to other plants, making entire fields not harvestable.
The disease has been confirmed in Taiwan, China and the United States, but it is unknown how it entered Japan. Here it seems to have spread across the country through seed potato and seedling distribution. With the exception of the three prefectures where it was first confirmed, so far infections have been contained to a few areas. Still, there's no room for complac