How to effectively prevent twin bulbs in onions
How to prevent onion "twins"? Please advise. To improve the market quality of onions, early prevention of "twins" is key. Onions have a high incidence of "twins", which seriously affects their market value, so prevention should be carried out as early as possible. The causes of twins are: sowing too early, with seedlings growing too large before winter; applying too much nitrogen fertilizer during the seedling stage...
How to prevent onion "twins"? Please advise.
To improve the market quality of onions, early prevention of "twins" is key. Onions have a high incidence of "twins", which seriously affects their market value, so prevention should be carried out as early as possible. The causes of twins are: sowing too early, with seedlings growing too large before winter; applying too much nitrogen fertilizer during the seedling stage; warm winters, late spring cold snaps, and other factors, all of which can cause secondary tillering during the seedling stage, forming "twins". In addition, pest damage to the growing point during the seedling stage; fertilizer burn; artificial injury, etc., can also lead to secondary tillering. Poor-quality seeds are also one of the factors causing onion "twins".
Preventive measures: sow at the right time; when transplanting, seedling bulbs should preferably be 3-0.8 cm in diameter, and those too large or too small should be discarded; spray New High-Fat Film at the appropriate time during the seedling stage to prevent pathogen infection, improve resistance to natural disasters, increase photosynthetic intensity, and protect seedlings so they grow vigorously. Apply nitrogen fertilizer appropriately, and fertilizer should be applied with a combination of nitrogen, phosphorus, and potassium; promptly prevent pests such as cutworms, wireworms, mole crickets, and beet armyworms; when spreading chemical fertilizer, take care not to spread it into the leaf sheaths; during management, take care not to crush the seedlings.
If twins are found during the growing period, one of them can be removed with a bamboo strip, keeping one. Spray Hushu Jiangjun promptly to sterilize and disinfect, protecting the wound so it heals healthily. After the wound heals for several days, water, apply topdressing, and spray Diguo Zhuangdiling, so that the nutrient transport ducts of the underground fruit become thicker, increasing the vigor of underground fruit expansion, making the fruit surface smooth, the fruit shape robust, and achieving high quality and high yield.
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