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Spray or irrigation root: 1. Seedling damping-off. Occurred in April-June, with 0.3% to 0.5% potassium permanganate solution in the early stages of disease development for pine, fir, oak, nan, mulberry, coriander, alfalfa, alfalfa, birch, ginkgo and fruit tree flower seedlings; The damping-off disease of melon vegetables at the seedling stage is sprayed with potassium permanganate solution 800 to 1000 times every 7 to 10 days after emergence, and it needs to be controlled 3 times. The incidence rate can be controlled at about 2%. 2. Seedlings wilt. Prevention of melons, beans, solanaceous vegetables, flowers wilt disease, the effect is better than Topbujin, the enemy Kesong and other pesticides. Usually in the early days of Daejeon, potassium permanganate 800 to 1000 times the whole field per plant root irrigation, 150 milliliters per plant, every 5 to 7 days irrigation once, even irrigation 3 times, can achieve significant control effect . 3. Prevention of viral diseases. In the early stage of the onset of flowers such as capsicum and so on, the potassium permanganate is used 600 to 800 times, and the melons such as zucchini are sprayed on the whole plant with 1000 to 1200 times, and sprayed once every 5 to 7 days. Up to 4 times, the spread of viral diseases can be controlled. Note that before the prevention of virus diseases, the pests on the plants, such as locusts, should be controlled to prevent the aphid from being infected. 4. Prevention of downy mildew. The effect of potassium permanganate on controlling downy mildew of vegetables and flowers was significantly higher than that of chlorothalonil and dexamethasone. For example, cucumbers are sprayed with potassium permanganate from 600 to 800 times before emergence from the 2 leaves to 1 melon, once every 5 to 7 days, and even sprayed 4 times to prevent the occurrence of downy mildew. In the presence of central diseased plants, spraying 600 times with potassium permanganate and spraying three times, has a good control effect. 5. Prevent cruciferous vegetables from soft rot. The seedling and rosette stages of kale and Chinese cabbage are sprayed 3 to 4 times with 600 to 800 times potassium permanganate, which can effectively control soft rot and can also treat downy mildew. 6. Control root rot. The control effect is up to 91% with 0.3% to 0.5% potassium permanganate solution sprayed and rooted in the initial stage of root rot in the pine, pine, oak, paulownia oil tea, black peony, Chinese rose, rose, sweet-scented osmanthus and fruit trees, flower seedlings. To 95%; root rot occurs at the seedling stage for melons, eggplants, beans, vegetables, and cotton, sprayed and rooted with 500 to 600 times solution, sprayed every 7 to 10 days, and sprayed three times. Can control the hazard. In addition, pine seedling blight, cedar blight, orange seedlings anthracnose, chestnut powdery mildew, tea seedlings nucleus rot and so on, in the early stage of seedling disease, 400 to 500 times potassium permanganate spray and irrigation Root, the control effect can reach more than 96%.
When potassium permanganate is used, stirring should be continued during dispensing so that potassium permanganate is fully dissolved and used together with it to prevent long-term release failure. In addition, the spray should be selected around 9:00 am or after 4 pm. The seedlings before 7 leaves should be rinsed with clean water 5 minutes after spraying to prevent phytotoxicity.
Application of Potassium Permanganate in Seedlings
Potassium permanganate solution has a strong bactericidal and disinfecting effect. It is effective in preventing and treating diseases of a wide variety of seedlings. It is non-toxic and non-residual. It can also be used as a micro fertilizer to control damping-off, damping-off, downy mildew during seedling stage. Diseases such as diseases, soft rot, blight, root rot, and virus diseases work well. Soaking and disinfecting: 0.3% to 0.5% potassium permanganate solution can be used to immerse seeds such as fir, pine, oak, alfalfa, camellia, nan, shiki, tea, nectarine, oyster shell; or 0.1% to 0.2% permanganate Potassium solution is soaked in soybeans, peanuts, corn, tomatoes, watermelons, cucumbers, eggplants, melons and other vegetables and melon seeds. Usually soaked for 2 to 3 hours, after washing with dry water after sowing, can eliminate the germs brought by the seeds, prompting rapid germination, growth and tidy.