Detailed Explanation of Key Management Techniques for the Late Growth Stage of Onions

The onion is a very common vegetable in China, with a very wide planting area across 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 growth stage of onions, 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 growth stage of onions, the first management task we should do well is watering. This is because the late growth stage of onions has already reached the bulb expansion stage. 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 moisture to promote bulb growth. However, about seven days before harvesting the onions, watering should be stopped to avoid root rot from excessive 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, with urea and potassium sulfate as the main fertilizers. We should not only do a good job of topdressing, but also pay attention to appropriately spraying foliar fertilizer. In the early and middle stages of onion bulb expansion, foliar fertilizer should be sprayed in combination with pest and disease control work. This avoids premature senescence in onions and promotes onion bulb expansion. For foliar fertilizer, agents such as potassium dihydrogen phosphate and Fengchanling can be used. Spraying continuously about 3 times or so can achieve good results.

3. Proper bolting removal

In addition to fertilizer and water management, removing onion bolts is also very important. Especially in the late growth stage of onions, we should frequently observe the onion's growth. If early bolting is found in onions, it should be pinched off 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, which 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 leaf miners, 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, they should be dealt with in time to ensure normal onion growth.

The above is a brief introduction to late-stage management techniques for onions. That is all for today's introduction. This article is for reference only, and we hope it can be helpful to everyone!