A few days ago, Xiaobian just talked with you about the cultivation techniques of Atractylodes sinensis in Pingjiang, Hunan Province, but did not talk much about each disease of Atractylodes. The following is mainly about the identification and prevention of Atractylodes Rhizome Root Rot.
First, the symptoms and harms of Atractylodes Rhizome
1. Symptoms and hazards of the upper part of the ground
After the disease, the roots absorb water and the stem transport function is impaired. When the temperature exceeds 25 °C at noon, the leaves begin to lose water and wilting, and return to normal in the morning and evening. As the disease worsened, the degree of wilting of Atractylodes lanceolata was also aggravated, and the leaves no longer returned to normal in the morning and evening, and eventually the leaves completely lost water and died.
2. Performance symptoms and hazards in the underground part
After the disease, the fine roots of the diseased plants are firstly yellowish brown, then brown and dry, and then spread to the roots and fleshy roots. After the main root is ill, the vascular bundle becomes brown and spreads to the stem, causing brown lesions in the entire vascular bundle system, showing a dark brown undercut rot. In the later period, the rhizomes all become sponge-like dark brown dry rot, and the cortex and xylem are separated, leaving only wood fiber and debris, and the diseased plants are easily pulled out from the soil.
Second, the occurrence of Atractylodes Rhizome
1. Overwintering pathogens of the pathogens overwinter in the seedlings, soils and diseased bodies of the mycelium, which is the initial source of infection in the following year.
2. Routes of transmission and ways of infecting bacteria
The germs are spread by wind and rain, underground pests, farming operations, etc., and can also be invaded or directly invaded by wounds such as mechanical injuries.
3. The law of onset
The onset of the disease occurs at an average daily temperature of 16 to 17 ° C, and the optimum temperature is 22 to 28 ° C. In the Luzhou area, the onset of the disease begins in the middle and late April, and the period from June to August is the peak period, and gradually decreases after August. During the onset of the disease, the amount of rainfall and the relative humidity are important conditions for the spread of the disease. The damage of underground pests and root-knot nematodes will aggravate the occurrence of Atractylodes Rhizome.
Third, comprehensive prevention methods
1. Reasonable rotation: Rotation with crops such as Gramineae.
2. Reasonable land selection: Choose sand loam with high ground and good drainage.
3, choose high-quality Atractylodes bud: pick disease-free robust buds for cultivation.
4. Soil disinfection: Deeply turn the soil 15 days before planting, and apply 1kg of mixed soil with Guoguang carbendazim per acre.
5, germ germination: before planting with Guoguang carbendazim + rice jiajia + Genbao water sprayed evenly for seed dressing, dried and planted.
6, seedling period using Youfeng + Genbao + heavy 茬 Bao + rice jiajia water liquid foliar spray twice, 10-15 days apart, improve the disease resistance of Atractylodes macrocephala.
7, before the onset or early onset of the use of Youfeng + Genbao + heavy 茬 Bao with water irrigation roots prevention. When the incidence is serious, the diseased plants are removed in time.
Tips:
Due to different varieties of Atractylodes, tree potential, climatic conditions, growing environment and cultivation management methods, the control plan is for reference only.
Atractylodes root rot is one of the main diseases in Atractylodes macrocephala production. When it occurs seriously, it can cause more than 50% reduction of Atractylodes macrocephala, which is an important factor affecting the income of Atractylodes cultivation. Atractylodes Rhizome root rot is caused by many factors. It is difficult to achieve good results in the prevention and control of Atractylodes Rhizome root rot by a single control method. Therefore, it is necessary to adopt various methods and comprehensive control to achieve better results. .
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