Potassium permanganate is a strong redox agent whose solution has bactericidal, disinfecting and antiseptic effects. In recent years, vegetable farmers have used their control to control vegetable diseases and achieved relatively good control effects. Some experiments have shown that the use of potassium permanganate to control the disease of the solanaceous seedlings, the powdery mildew of melons and vegetables, and the melon wilt, the control effect is very good. At the same time, it can supplement the nutrients of manganese and potassium required for vegetables, which can increase the yield of vegetables and have the dual effects of fertilizers. Therefore, potassium permanganate is a kind of vegetable fungicide with no toxic, no residue and no pollution. In addition to seed disinfection, there are two methods of spraying and rooting.
First, the seeds are sterilized.
Soaking tomato, eggplant, pepper and other Solanaceae vegetable seeds with 0.1%-0.15% potassium permanganate solution for 15-20 minutes can prevent viral diseases, early blight, anthracnose, brown spot and so on. The watermelon seeds are soaked with potassium permanganate 1000 times for 8-10 hours to control the wilt disease. However, it should be noted that after soaking seeds with potassium permanganate solution, the seeds should be rinsed with clean water before they can be germinated or dried to be sown.
Second, spray.
For the disease of the melon vegetable seedling stage, it is sprayed with 1000 times solution of potassium permanganate solution every 7-10 days after emergence, and the disease is controlled continuously for 3 times. The incidence rate can be controlled below 2%. In the early stage of infection with viruses such as peppers and solanaceous vegetables and flowers, 800 times of potassium permanganate, zucchini and other melons are sprayed with 1000-1200 times of liquid in the initial stage, and sprayed once every 5-7 days. 3 to 4 times, can control the spread of viral diseases.
Again, rooting.
The roots of the potassium permanganate 800-1000 times were planted every plant, and the roots were irrigated every 10 days, and then 2-3 times, which could achieve significant control effects on the wilt of watermelon and melon. Rooting with potassium permanganate 500 times or 800 times solution, once every 7 days, a total of 3-4 times, can effectively prevent pepper root rot and eggplant rickets. If potassium permanganate is used in the prevention of disease in the seedbed, the seedbed can be wetted. After use, rinse the leaf with water to prevent it from being damaged.
In addition, potassium permanganate solution should not be mixed with other pesticides . When preparing potassium permanganate solution, it can be used with water. It can not be used with hot water. It can be used as long as it is used. Whether spray or rooting is carried out in the early stages of the onset of vegetables, the spray should be carried out around 9 am or after 4 pm. Spray the seedlings before the 7 leaves, and rinse them with water 5 minutes after spraying. Moreover, low concentration is used in the seedling stage, and high concentration is used in the adult stage. After the drug device is used, rinse it with clean water in time to avoid oxidation and erosion.
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