How to prevent and cure astragalus purple feather disease?

How to prevent and cure astragalus purple feather disease? Please introduce the method that the pathogen of astragalus purple feather disease is a kind of basidiomycetes in fungi, which mainly harms the underground roots, first occurs in the underground fibrous roots, and then spreads to the lateral roots and main roots. At the initial stage of the disease, a layer of white thread can be seen on the roots, and after the development of the disease, it becomes purple-brown, and interweaves into a layer of bacterial membrane and sclerotia, the roots gradually rot from outside to inside, the aboveground stems and leaves wilt from bottom to top, and finally the whole plant rotts and dies. Prevention and control measures: 1, timely removal of diseased and disabled tissue during harvest, concentrated burning and deep burial. 2. Replant after rotation with Gramineae crops for 3 or 4 years. 3. When diseased plants are found, the soil with roots is moved out of the field in time to prevent sclerotia and fungal cords from falling into the soil, and 5% lime water is used to irrigate the diseased holes for disinfection. 4. Apply 20,25kg lime nitrogen per mu as base fertilizer, and then sow after 2 weeks. 5. Disinfect the soil with 1.5 kg of 70% dimethazone powder and 25 kg of fine soil per mu. Click to get more planting techniques of Radix Astragali