Atractylodes macrocephala planting: what is the root rot of Atractylodes macrocephala Koidz?

What is root rot of Atractylodes macrocephala Koidz? How to prevent and cure root rot of Atractylodes macrocephala Koidz? Please introduce the root rot disease of Atractylodes macrocephala Koidz. The underground fine roots turn brown and rot, then spread to the upper fleshy rhizomes and stems, showing dark brown sunken rot spots, and the aboveground parts begin to wilt. The vascular bundles showed obvious discoloration circle in the rhizome and stem cross-section. in the later stage, the rhizomes all turned into spongy black dry rot, and the plants died and were easy to be pulled out from the soil. The occurrence of dry rot, stem rot and wet rot is common in both new and old producing areas, which seriously affects the yield and quality. The root rot of Atractylodes macrocephala is caused by soil flooding, viscous weight or the application of immature organic fertilizer, and it is easy to occur after wounds caused by nematodes and underground pests. In the middle and later stage of growth, if it clears up after continuous overcast and rain, and the temperature increases, the disease will be serious. The peak period of the disease was from June to August. The prevention and control methods of root rot of Atractylodes macrocephala Koidz are as follows: 1. Select sandy soil with high dryness and good drainage, shallow ploughing is suitable to avoid root injury, and strengthen the control of underground pests and nematodes. 2. 2. Rational rotation, selection of dwarf broad-leaved varieties with strong disease resistance, selection of robust disease-free planting as seeds, keeping the seeds fresh during storage to prevent water loss and dryness after fever. 3. Pull out the diseased plant in the early stage, and irrigate the diseased point with 50% carbendazim or 70% methyl topiramate 800 times solution; soak the seeds with 50% carbendazim 500 times solution for 6 minutes before planting, fish out and dry after planting. Click to get more planting techniques of Atractylodes macrocephala Koidz