There are many root diseases of vegetables, and they should be treated quickly! Irrigation, are you irrigating right?
In production, root disease is a common type of disease on vegetables. When the damage is serious, a large area of dead trees will appear in the shed, which will bring great economic losses to vegetable farmers.
For example, bacterial disease bacterial wilt, in the early stage, the leaves wilt at noon, and return to normal in the morning and evening; repeated many times, the wilting intensifies and the plant dies, but the plant remains green. There is also a fungal disease Fusarium wilt, which usually occurs during the flowering and fruiting period. The disease starts from the lower leaves, and wilts from bottom to top. The leaves gradually turn from green to light, from yellow to yellow, and then turn brown, and the whole plant does not fall off. wither.
In response to this root disease, many vegetable farmers will take the method of root irrigation to control. But the actual effect of root irrigation is very different. For dead trees with the same symptoms, the same medicine was used, but the effect after root irrigation was worlds apart! Others used medicine to get rid of the disease, and the dead trees were quickly controlled, but the effect in his shed was not very good. The dead tree is still developing, what's going on?
The reason for the big difference in the effect is the method of irrigating the roots. Before irrigating the roots, if the film is removed first, the base of the stem is cleaned to form a small pit, and then the medicine is applied, the liquid can penetrate into the roots, and the effect is naturally good; if the vegetable farmers are in a hurry to use the medicine, they can directly irrigate the roots, and most of the liquid will flow away. , it will not have the effect of root irrigation.
There are many kinds of root diseases that cause dead trees, such as Phytophthora root rot, Pythium root rot, Fusarium root rot, bacterial wilt, Fusarium wilt, Verticillium wilt, etc. The parts of these diseases are different. , some mainly damage the taproot, some damage the capillary root, and some damage the stem base.
For example, bacterial wilt mainly affects crops such as tomatoes, eggplants, peppers, potatoes, and ginger. Pathogens invade from the wound at the root or the base of the stem and expand in the vascular tissue of the plant, causing duct blockage and cell poisoning.
Another example, stem rot is often called "rotten ankle disease" by vegetable farmers. Mainly, the stalks near the ground turn brown, the roots are healthy, and the stalks are gradually sunken into dark brown. In severe cases, the infected parts spread around the stems, the epidermis turns black and rots, and the plants gradually wilt and die.
Therefore, how to accurately deliver pesticides to the diseased site affects the prevention and control of root diseases. Many vegetable farmers are afraid of trouble when irrigating roots, and directly unscrew the nozzle and spray it at the base of the stem. Although this method has a good effect on diseases that occur at the base of the stem, the effect on diseases that occur on the main root and capillary root cannot be guaranteed.
Therefore, when root disease occurs and needs to be irrigated, you should not be afraid of trouble. You must first do the preparatory work to ensure that the medicinal solution can reach the diseased site.
For diseases that occur at the base of the stem, such as Phytophthora root rot, stem base rot, etc., you can directly spray the stem base with medicine;
For the diseases of taproot and capillary root, better effect can be achieved only by removing the root and applying the medicine directly to the root.
In addition, after the roots are irrigated, although the pathogenic bacteria are killed, the beneficial bacteria in the soil are also killed. Therefore, the microbial inoculants must be supplemented in time after the pharmaceuticals are irrigated. This is because the microbial inoculants can not only Increasing the number of beneficial bacteria in the soil and the proliferation of pathogenic bacteria can also promote the growth of the root system and improve the resistance of the root system, thereby reducing the re-infection of pathogenic bacteria.