The application of potassium permanganate in seedlings
This article brings you the introduction of common gardening knowledge, the application of potassium permanganate in seedlings. Next, the editor will answer your questions in detail.
Potassium permanganate solution has strong bactericidal and disinfectant effects, and is very effective in preventing and treating various seedling diseases. It is non-toxic, leaves no residue, and can also be used as a micro-fertilizer to prevent diseases such as seedling damping-off, root rot, downy mildew, soft rot, wilt, root rot, and viral diseases.
Seed soaking and disinfection: A 0.3% to 0.5% potassium permanganate solution can be used to soak seeds such as cedar, pine, eucalyptus, camphor, tea oil, nanmu, wood ore, tea leaves, peach, and hawthorn; or a 0.1% to 0.2% potassium permanganate solution can be used to soak seeds of vegetables and melons such as soybeans, peanuts, corn, tomatoes, watermelons, cucumbers, eggplants, and melons. Generally, soak for 2 to 3 hours, wash with clean water and dry in the shade before sowing to eliminate the bacteria carried by the seeds, promote rapid germination, and uniform growth.
Spraying or root irrigation:
1. Damping-off disease of seedlings. This disease often occurs from April to June and affects pine, cedar, camphor, nanmu, mulberry, elm, eucalyptus, catalpa, birch, ginkgo, and fruit tree seedlings. Use a 0.3% to 0.5% potassium permanganate solution at the early stage of the disease; for vegetable seedlings of melons, spray with an 800 to 1000-fold potassium permanganate solution every 7 to 10 days after emergence, and control the incidence rate to around 2% after 3 treatments.
2. Wilt disease of seedlings. The control effect is better than that of pesticides such as thiophanate-methyl and benomyl. Generally, at the early stage of the disease in the field, spray the entire field with an 800 to 1000-fold potassium permanganate solution, applying 150 ml per plant, and repeat every 5 to 7 days for 3 times to achieve significant control.
3. Control of viral diseases. For solanaceous vegetables and flowers like peppers at the early stage of the disease, use a 600 to 800-fold potassium permanganate solution, and for melons like zucchini, use a 1000 to 1200-fold solution to spray the whole plant. Spray once every 5 to 7 days for 3 to 4 times to control the spread of viral diseases. Note that before controlling viral diseases, it is necessary to control piercing-sucking insects such as aphids to prevent the spread of the virus.
4. Control of downy mildew. Potassium permanganate is more effective than pesticides such as chlorothalonil and zineb. For example, spray cucumber seedlings with a 600 to 800-fold potassium permanganate solution from seedling emergence to 2 leaves and 1 heart to before fruit setting, once every 5 to 7 days for 4 times to prevent downy mildew. When central diseased plants appear, spray with a 600-fold potassium permanganate solution for 3 times for good control.
5. Control of soft rot in cruciferous vegetables. For seedlings and rosette stages of ornamental kale and Chinese cabbages, spray 3 to 4 times with a 600 to 800-fold potassium permanganate solution to effectively control soft rot and also prevent downy mildew.
6. Control of root rot. For seedlings of trees and flowers such as cedar, pine, camphor, paulownia, tea oil, Chinese lacquer, rose, camellia, and fruit trees, spray and irrigate with a 0.3% to 0.5% potassium permanganate solution at the early stage of root rot, achieving a control effect of 91% to 95%; for crops such as melons, eggplants, legumes, vegetables, and cotton with root rot during the seedling stage, use a 500 to 600-fold solution to spray and irrigate, once every 7 to 10 days for 3 times to control the damage.
In addition, for diseases such as damping-off disease of cedar seedlings, red rot disease of Cryptomeria seedlings, T-J disease of orange seedlings, powdery mildew disease of chestnut seedlings, and sclerotinia root rot disease of tea seedlings, spray and irrigate with a 400 to 500-fold potassium permanganate solution at the early stage of the disease, achieving a control effect of over 96%.
When using potassium permanganate, continuously stir the solution to ensure that the potassium permanganate is fully dissolved, and use it immediately to prevent it from becoming ineffective over time. Also, apply pesticides in the morning around 9 o'clock or in the afternoon after 4 o'clock. For seedlings with 7 leaves or fewer, rinse with clean water within 5 minutes after spraying to prevent phytotoxicity.
The detailed explanation of the application of potassium permanganate in seedlings shared above is for your reference and suggestion only!