What is Atractylodes rhizome root rot? Disease knowledge that Atractylodes growers need to know
What is Atractylodes rhizome root rot? How should Atractylodes rhizome root rot be prevented and controlled? Please explain that in Atractylodes rhizome root rot, the fine roots of the underground part of affected plants generally turn brown and rot, then spread to the upper fleshy rhizome and stems, showing dark brown sunken rotting spots, and the aboveground part begins to wilt. On the cut surface of the rhizome and stem, the vascular bundles show an obvious discoloration ring; in the later stage, the root...
What is Atractylodes rhizome root rot? How should Atractylodes rhizome root rot be prevented and controlled? Please explainIn Atractylodes rhizome root rot, the fine roots of the underground part of affected plants generally turn brown and rot, then spread to the upper fleshy rhizome and stems, showing dark brown sunken rotting spots, and the aboveground part begins to wilt. On the cut surface of the rhizome and stem, the vascular bundles show an obvious discoloration ring; in the later stage, the rhizome entirely becomes spongy black dry rot, the plant dies, and it is easily pulled up from the soil. It occurs commonly in both new and old production areas, causing dry rot, stem rot and wet rot, and seriously affecting yield and quality.
The causes of Atractylodes rhizome root rot are poor root development caused by soil waterlogging, heavy clay soil or the application of undecomposed organic fertilizer, as well as wounds produced by damage from nematodes and underground pests, which make the disease more likely to occur. If continuous rainy weather is followed by clearing and rising temperatures in the mid-to-late growth period, the disease occurs severely. June to August is the peak period of incidence.
Prevention and control methods for Atractylodes rhizome root rot:
1. Choose sandy loam soil with high, dry terrain and good drainage for planting; cultivate shallowly to avoid damaging the roots; strengthen the control of underground pests and nematodes.
2. Practice reasonable crop rotation, and choose to plant short-stemmed broad-leaf varieties with relatively strong disease resistance; select healthy, disease-free planting material as seed stock, and keep the seed stock fresh and alive during storage to prevent dehydration and shriveling after heating.
3. Remove diseased plants early, and drench the disease holes with 50% carbendazim or 70% thiophanate-methyl at 800 times dilution; before planting, soak the seed stock in 50% carbendazim at 500 times dilution for 6 to 8 minutes, remove it, let it dry, and then plant.
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