First, root rot :
As the name suggests, the roots are rot. Similar to the symptoms of sputum root disease. After the roots are infected by the pathogens, they first spread from the roots to the roots and then to the main roots, and the color gradually turns dark brown. After the onset, the underground roots slowly rotted, and there were no obvious symptoms in the initial stems of the ground. However, the roots were not supplied with fertilizer and water for a long time, and the stems were withered, and the branches and leaves were yellow until they died. Wheat, strawberry, scutellaria, salvia miltiorrhiza, Radix, Radix Astragali, Radix Pseudostellariae, Peony and Codonopsis are susceptible to this disease.
Second, the main causes of root rot :
Last year, the crops with disease were not completely removed; or because the soil where the crops were planted was too high, the roots were damaged when they were ditched or weeded on both sides; or the water was too large due to rain or irrigation, and the drainage was not timely; or Insufficient illumination, low temperature and high humidity, excessive soil viscosity, agglomeration of the soil, poor ventilation; and when the heel is damaged by injury, it is also the most vulnerable to pathogen invasion. More root rot in the rainy season.
Third, the characteristics of root rot are:
Everyone knows that root rot is caused by germs, but what is this germ? It is a fungus, the fungus, the genus Fusarium oxysporum, the English name Fusariumsolani (Mart.) App.etWollenw, the chief culprit causing root rot. Large amounts of water, no ventilation, insufficient light, large soil viscosity, and damage to the roots are the main causes of pathogen invasion. After the onset, the roots gradually changed from light brown to dark brown. The pathogen remains in the soil for the winter, and the leap year enters the crop from the above reasons and spreads through irrigation or rain.
four. There are coups to prevent root rot :
Prevention and control of root rot agricultural pesticides:
1. Agricultural control methods:
1 It is clear from the above causes that when the ditch is cut on both sides of the soil with high soil, it should not be too close to avoid injury to the root system.
2 It is also necessary to choose a relatively flat soil for planting due to a large amount of water and improper drainage.
3 If the soil in the planting area is not flat, it does not matter, but do the drainage work and drain the water, especially during the rainy season.
4 soil viscosity is too high, easy to cause soil agglomeration, easy to cause roots underdeveloped. Wearing clothes that are too tight with humans makes the body uncomfortable.
5 Everyone knows that the use of any fertilizer that is not decomposed is likely to cause the incidence of disease. This is also the reason for the blight disease introduced earlier. Applying organic fertilizer, potassium fertilizer and phosphate fertilizer to make the plant "strong" to enhance disease resistance.
6 seed bed selection, the crops to be seeded are best to choose the seedbed of different crops last year, that is, to plant the crops.
7 selection of quality seeds is also a good choice. High quality seeds can also largely resist the occurrence of diseases.
2. Pesticide control is closely related to fungicides :
Like other diseases, pesticides control root rot first is seed disinfection, then soil disinfection, and finally crop selection for crops after onset.
1 seed disinfection before planting. It is also the most common first step to reduce the disease.
The amount of seed disinfection: Because the seed is compared with the soil, the area is small. Therefore, seed dressing can use a relatively low drug. 600-800 times solution of carbendazim or 800-1000 times solution of carbaryl
2 soil disinfection before planting. The second step is to reduce the disease.
Soil disinfection is relatively higher than the use of seed disinfectants. 1200-1500 times solution of carbendazim or 1500-2000 times solution of carbaryl
3 roots after onset. The third step is to reduce the disease.
The root irrigation is similar to the soil disinfection, and the application area is large, so the dosage is the same. 1200-1500 times solution of carbendazim or 1500-2000 times solution of carbaryl
According to the experience of the majority of farmers and the agricultural sector: carbendazim and nail cream are the most commonly used pesticide fungicides against root rot. It has a wide range of action and is easy to use. It is a pesticide to treat all stages of the disease. It’s really a bottle.
Here's how to use the carbendazim and nail cream:
The fungicides, carbaryl and nail cream, can not only disinfect seeds, soil disinfection, root irrigation, but also a plant growth regulator to promote plant growth. This medicine can be directly absorbed by the roots of plants and enters the plant body, moving very quickly. After moving in the root system for only 3 hours, it moved to the stem and moved to the whole body of the plant for 24 hours. It is highly efficient, low-toxic, and pollution-free. It can inhibit the normal growth of pathogenic fungal mycelium or directly kill germs, and promote plant growth. Agree with the current green vegetables and green life. Malignant and creamy mildew also have significant effects on root rot, blight, anthracnose, blight, dry rot, black star disease, sclerotia soft rot and so on.
Common root rots are: wheat root rot, strawberry root rot.
Malignant spirit http://
Methyl carbamide http://
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