The Latest Technical Methods and Tutorial for Late-Stage Onion Management
Onion is a very common vegetable in China, and it is grown across a very wide area in the country. When growing onions, we first need to adjust our management methods according to the onion's growth stage. This is especially true in the late stage of onion growth, when management is even more important. So how should onions be managed in the late stage? Today, the editor brings you the late-stage management techniques for onions. Let's take a look together below!
1. Reasonable watering
In the late stage of onion growth, the first management task we need to do well is watering. This is because the late stage of onion growth has already reached the bulb expansion stage of the onion. And during the bulb expansion stage, the onion's demand for water increases greatly. So in the late stage, we should pay attention to watering frequently. When watering, drip irrigation with small water droplets should be the main method. Water about once every week or so, providing sufficient water to promote bulb growth. However, about seven days before harvesting the onions, watering should be stopped to avoid root rot from too much water.
2. Scientific topdressing
During the onion bulb expansion stage, the onion's demand for nutrients also increases greatly. Therefore, fertilization work is also very important. Fertilization should begin in early May, mainly with urea and potassium sulfate. We should not only do a good job of topdressing, but also pay attention to properly spraying foliar fertilizer. In the early and middle stages before onion bulb expansion, foliar fertilizer should be sprayed together with pest and disease control work. This avoids premature aging of the onions and promotes onion bulb expansion. For foliar fertilizer, agents such as potassium dihydrogen phosphate and Fengchanling can be used. Spraying about 3 times in succession can achieve good results.
3. Proper removal of bolting stalks
In addition to fertilizer and water management, removing bolting stalks from onions is also very important. Especially in the late stage of onion growth, we should frequently observe the onion's growth. If early bolting is found in the onions, then it should be removed in time. This is because if onions bolt early, they will consume too many nutrients, causing a lack of nutrients for onion bulb expansion, thereby reducing onion quality and yield, and economic benefits will also be affected as a result.
4. Pest and disease control
Finally, attention should be paid to doing a good job of pest and disease control. In the late stage of onions, the main disease includes downy mildew, and this disease has a serious impact on onion leaves. In the early stage of the disease, we can use agents such as aluminum triethyl phosphonate for spray control. Then the main pests include leafminers, root maggots, and so on. For pests, common insecticides on the market can be used for control. However, pest and disease control should mainly focus on prevention. We should frequently check the onion's growth. If abnormalities are found, then they should be dealt with in time to ensure normal onion growth.
The above is a brief introduction to late-stage onion management techniques. That is all for today's introduction. This article is for reference only, and we hope it can be of some help to everyone!