Welsh onion likes low temperature and humid environment. The optimum temperature for growth is 15-25°C, and it is more than 26°C. It grows slowly and slowly, and enters a semi-dormant state above 30°C. The first stage is generally from the cultivation of green onions to noxiousness, this period is the temperature from 15 °C to 25 °C period, more suitable for growing onion. Therefore, after planting seedlings, they quickly entered the first peak of growth, extending a leaf 4-5 days later. At this time, we should use Zhuang, early planting onions, and strengthen fertilizer and water management. The second stage entered the volcano from mid-July until the end of August. It was a hot summer season. At this time the green onions grow slowly, 8-10 days to extend out a leaf, disease resistance weakened, enter the semi-dormant period, we should strengthen the cultivator weeding, pay attention to drainage and pest control. In the third stage, from the end of August to the middle of October, the temperature dropped, the temperature difference between day and night increased, the speed of growth of green onions accelerated, 3-4 days stretched out a leaf, blue and white elongation increased quickly, entering the second growth peak period. At this time, it is necessary to top-dress fertilizer in time, strengthen cultivating soil by cultivating cultivator, promote light green growth, and increase yield. Onion diseases are mainly purple spot, downy mildew, and rust. Purple spot, downy mildew prevention and treatment is mainly after the rain with chlorothalonil, Rhizoctonia, anti-virus leaf surface spray. Rust is a small brownish brown bulge on the surface of onion leaves, and is sprayed with chlorenone in time to prevent and control it. Onion pests mainly include mantle, leafminer and onion thrips. Ground beetle is sprayed with dipterex once every 10-12 days after the beginning of autumn, and has a good repellent effect on adults. 90% of trichlorfon 800-1000 times can be used for perfusion after occurrence. Diatomaceous ropes and green onion thrips can use dimethoate, kung fu, and enemy leaf spray. Onion leaves have a layer of wax powder, no matter what drug spray must be added to the liquid detergent 1% neutral detergent as a spreading agent, drugs can play a role in adhesion to the foliage, or spraying is invalid. Peptides,Human Growth Hormone,Melanotan2,Ghrp Shaanxi Hongbaiyi Biotech Co., Ltd. , https://www.sxhongbaiyi.com