Green onion planting technology: what is green onion brown spot disease?

What is the brown spot of green onion? What harm does green onion brown spot disease have? Is there any way to prevent it? Also ask netizens to help guide the seed network to sort out the harm and control methods of green onion brown spot, which are listed below for netizens' reference. Green onion brown spot disease harm: green onion brown spot, also known as leaf tip verticillium wilt, the main harm to leaves, leaf infection easy to start from the upper, the beginning of water-immersed yellow brown spots, and then generate fusiform disease spots, generally long 10: 30 mm, width 3: 6 mm, gray-brown in the middle of the spot, edge brown, the spot is easy to produce black spots, that is, ascomycetes, serious, several major disease spots fusion, resulting in local leaf dry. Control methods of green onion brown spot: 1, select high-foot white, three leaves Qi, chicken leg onions, Zhangqiu scallions and other heat-resistant varieties. 2. 2. Strengthen management, timely drainage after rain, prevent onion fields from getting too wet, improve root activity and enhance disease resistance. 3. At the initial stage of the disease, spray 50% carbendazim wettable powder or promethazine wettable powder 1000 times, or use 50% carbendazim wettable powder or 70% methyl thiophanate wettable powder 1000 times, add 75% chlorothalonil wettable powder 1000 times, once every 7 times 10 days, spray 2 times 3 times. Click to get more green onion planting techniques click to get more vegetable planting techniques