1, one is because of its own quality is not very good, such as in the process of planting the soil lack of nutrients, too much rain, or may also be due to the infection of germs, germs caused by disease; and two is because of the placement of time is too long, breeding microorganisms occurring in the deterioration of the situation.

2, if the Tsavo radish has a black spot inside, then this time the Tsavo radish will not only taste worse, and there may be more microorganisms, and will produce more toxic metabolites.