A Detailed Guide to the Latest Management Methods for Welsh Onions During High-Temperature Periods

Welsh onion is one of the most common side vegetables in our daily lives, and it is grown fairly widely across all regions of our country. When growing Welsh onions, we need to adjust our management methods reasonably according to changes in temperature. This is especially important during high-temperature periods, when Welsh onion cultivation management matters even more. So how should Welsh onions be managed during high-temperature periods? Today, the editor brings you the management methods for Welsh onions during high-temperature periods. Let's take a look below!

1. Promote rooting and strengthen the plants

If Welsh onions enter a high-temperature period after field planting, then the focus of management at this time is promoting rooting. Pay attention to watering well, drain promptly during the rainy season to avoid waterlogging damage, and strengthen intertillage management to promote root growth. During the peak leafing stage of Welsh onions, the demand for fertilizer and water becomes greater, and at this time the first topdressing should be carried out together with watering. The fertilizer can mainly be urea, applied at about 20 jin per mu, and can also be combined with an appropriate amount of monopotassium phosphate or potassium nitrate. When the white pseudostem of the Welsh onion gradually forms, this is an important period for ensuring yield. At this time, topdress about twice, mainly with nitrogen fertilizer and supplemented by phosphorus and potassium fertilizer, and it is best to keep the soil moist to promote pseudostem growth.

2. Reasonable hilling

Hilling work is also essential. Generally, the deeper the hilling, the longer the pseudostem will be. Therefore, hilling is a main measure for softening the leaf sheaths of Welsh onions, preventing lodging, and improving yield and quality. Intertillage and hilling work should be carried out when the pseudostem is forming; otherwise, it can easily cause Welsh onions to rot. When hilling, be careful to appropriately increase the thickness of the hilling according to seedling age. Especially after the Start of Autumn, hilling is generally needed about once every two weeks, lasting for about two months, and this is the main measure for ensuring pseudostem length.

When hilling, it should be done in the afternoon, because at this time the leaves of Welsh onions are relatively soft. If done in the morning, the leaves are more crisp and tender, which can easily cause leaf damage. Hilling must not bury the heart leaves, to avoid affecting the growth of Welsh onions. If the onion seedlings are relatively small, then hill appropriately shallower, and then gradually increase the hilling thickness as the number of hillings increases. Each time, keep it at the exit point of the previous leaf. Finally, the hilling thickness should remain at about 15 cm above the ground, and remember not to bury the heart leaves, to prevent rotting of the roots and plants.

During high-temperature periods, Welsh onions are in a weakened growth stage, and at this time they are very susceptible to damage from pests and diseases. Common ones include downy mildew and phytophthora blight. Disease control is mainly based on early prevention, and appropriate agents should be sprayed during transplanting for control. The main agent is chlorothalonil, which can be mixed with an appropriate amount of streptomycin and can achieve effective preventive effects against both fungal and bacterial diseases. The main insect pests are onion thrips and leafminers. To control insect pests, first do a good job of weed control, then use insecticides such as Actara or Caixi for spraying and killing insects.

The above is a brief introduction to management methods for Welsh onions during high-temperature periods. That is all for today's introduction. This article is for reference only, and I hope it can be helpful to everyone!