Management Technology of Onion in the later stage

Onion is a very common vegetable in China, and it has a very wide planting area in China. When growing onions, we first need to adjust their management methods according to the growth period of onions. Especially in the later stage of onion growth, management is more important. So how to manage onions in the later stage? Today, the editor brings you the management technology of onion in the later stage. Let's take a look at it.

1. Rational watering

In the later stage of onion growth, the first thing we should do well is watering. Because in the later stage of onion growth, it has already reached the onion bulb expansion stage. On the other hand, the demand for water of onions will increase greatly during the bulb expansion period. So in the later stage, we should pay attention to watering frequently. When watering, drip irrigation should be given priority to. Water about every other week or so to meet enough water to promote the growth of the bulb. However, stop watering about seven days before the onion harvest to avoid rotting the roots.

2. Scientific topdressing

In the onion bulb expansion period, the onion demand for nutrition will also greatly increase. Therefore, fertilization is also very important. It is necessary to start fertilizing at the beginning of May. Urea and potassium sulfate are the main fertilizers. We should not only do a good job of topdressing, but also pay attention to spraying foliar fertilizer properly. In the early and middle stages of onion bulb expansion, foliar fertilizer should be sprayed in combination with pest control. Avoid the premature senescence of onions and promote the expansion of onion bulbs. Foliar fertilizer can be used potassium dihydrogen phosphate, Fengchanling and other agents, continuous spraying about 3 times can play a good effect.

3. Choking bolting properly

In addition to fertilizer and water management, the bolting of onions is also very important. Especially in the late growth stage of onions, we should often observe the growth of onions. If the onion is found to have early bolting, then it should be pinched off in time. Because onion if early bolting, then it will consume too much nutrition, resulting in onion bulb swelling lack of nutrition, thus reducing the quality and yield of onion, economic benefits will also be affected.

4. Pest control

Finally, we should pay attention to the prevention and control of diseases and insect pests. In the later stage of onion, the main diseases are downy mildew, which has a serious impact on onion leaves. In the early stage of the disease, we can use triethyl aluminum phosphate and other agents for spray prevention and treatment. Then the main pests are leaf miner, root maggot and so on, which can be controlled by common pesticides in the market. However, diseases and insect pests are mainly prevention-based, to often check the growth of onions, if found abnormal, then to deal with in time to ensure the normal growth of onions.

The above is a brief introduction to the late management technology of onion. That's all for today's introduction. This article is for reference only. I hope it can be helpful to everyone.