Potassium permanganate solution has a strong sterilization and disinfection effect. It is used to control seedling diseases of many horticultural crops, such as rickets, blight, soft rot, blight, root rot, etc., with obvious effects, and is non-toxic and non-residue. I. Soaking seeds and disinfection can be soaked in 0.3% to 0.5% potassium permanganate solution, usually soaked for 2 to 3 hours, washed with water and dried after sowing, can eliminate the bacteria caused by the seeds, and promote the seeds to germinate quickly and grow neatly. Second, spray irrigation 1, stumbled over. The disease mostly occurs from April to June. For a variety of fruit trees, flower seedlings, in the early stage of the disease with 0.3% to 0.5% potassium permanganate solution, spray control every 7-10 days after emergence. 2, blight. Generally, in the early stage of the disease, the roots are filled with potassium permanganate 800 to 1000 times, each plant is used with about 150 ml, and once every 5 to 7 days, it is irrigated 3 to 4 times. 3. Prevention of downy mildew. Spray with 600 to 800 times of potassium permanganate, once every 5 to 7 days, and spray 4 times. When the central diseased strain appeared, it was sprayed three times with 600 times of potassium permanganate. 4. Treat soft rot of cruciferous crops. In the seedling stage and rosette stage of the crop, spray with potassium permanganate 600 to 800 times for 3 to 4 times (every 5-7 days). 5. Prevention of root rot. For seedlings of various fruit trees, flowers, etc., spray and root the roots with 0.3 to 0.5% potassium permanganate solution at the beginning of root rot. In addition, cedar seedling blight, cedar blight, chestnut powdery mildew and fruit tree root rot, in the seedling stage with potassium permanganate 400 to 500 times spray and root irrigation. In order to obtain the desired drug effect, the drug should be continuously stirred to fully dissolve the potassium permanganate, and it can be used as needed to prevent prolonged failure. In addition, the spray should be selected at around 9 am or after 4 pm. Seedlings before 7 leaves should be rinsed with water 5 minutes after spraying to prevent phytotoxicity. Laminate Floor,Laminate Flooring,Laminated Flooring Hongda Anxin Decorative Material Co., Ltd. , http://www.hb-flooring.com