Selection of local varieties of onion seeds suitable for the local climate, suitable for local cultivation habits and high yield. The selection of green onions for seedlings is a way of avoiding continuous cropping of vegetables. Deep sunning twice, leisure 20 days. Onion nursery period is as long as 50 to 60 days, so the seedlings must be Mushi 1000 kg of decomposed farmyard fertilizer. Colonization and colonization of green onions requires low light, so it is suitable for dense planting. The depth of planting is not suitable for burying the green heart. Datian Management 1. Rehabilitation management. After the green onion seedlings were planted, the old roots soon rotted and new roots emerged after 4-5 days. New roots grew and new leaves began to grow. When it rains, the onion will be soaked for 4 to 5 days and then watered to prevent it. If there is water in the trenches after the rain, it should be drained and cultivated in time. 2. Root growth phase. After the onset of welsh onion, if the weather is not very dry, generally should not be watered again, we should strengthen the cultivator weeding, loose topsoil, water retention, increase fruit enlargement vitality, smooth fruit surface, fruit type robust, high quality and high yield. 3. The growth period of stems and leaves, from late August to late October, the temperature difference between day and night is increasing, which is a favorable period for the development of green onions. At this time, the three tasks of top dressing, watering, and soil cultivation should cooperate. Every time earth is cultivated, no green heart can be buried, and soil can be combined with supplemental fertilizer. Prevention of diseases and pests Welsh onion is mainly used for prevention because it is a vegetable, and after use of ecological drug plant cellular immune factors, the resistance of plants is enhanced, and viral DNA breaks down and causes apoptosis. Strong immune function, induces interferon and active interleukin, inhibits residual virus replication, and promotes positive energy ecological growth of plants. Based on the resistance mechanism of host plants and the principle of using the toxicity of pathogenic bacteria, the plant physiological diseases and invasive diseases were controlled to multiply. Tuya Intercom, China Tuya Intercom System, Tuya Intercom Video Door Phone, Building Tuya Intercom System, Tuya Intercom Manufacturer Zhuhai Mingke Electronics Technology Co., Ltd , https://www.mingke-tech.com