First, there is too much rain, which is not removed in time, leading to lack of oxygen and decay of roots.
Second, the fertilizer is immature, which leads to root burning, and some bacteria are immersed, which leads to root rot.
Third, the occurrence of radish bacterial soft rot or radish black rot and other diseases, resulting in radish rotten in the ground.
Solution:
1. Plots planted with radishes should be deeply ploughed and leveled to keep the soil loose and enhance the soil permeability. Radish likes organic fertilizer, so it should be fully applied. Manure should be fully decomposed, and never use raw manure.
2. Reasonable irrigation, strengthening intertillage, maintaining soil permeability, providing sufficient oxygen for radish roots and promoting their healthy growth.
3, timely drainage after the rain, do irrigation after the rain, no water on the ground after the rain.
4, please technical personnel to identify symptoms, symptomatic medication control.
Because the questions you ask provide too little information, you can't make an accurate judgment. It is suggested that you ask local agricultural technicians to make a diagnosis, determine what the problem or disease is, and then use appropriate preventive agents to prevent it.
The above answers are for reference only, thank you!