What is the reason for the withered and slender leaves of leek?

Causing leek leaves to turn yellow. When the temperature rises in summer, the leeks planted by some farmers will turn yellow because of high temperature, little rainfall, dry air and lack of water in the soil. At the same time, if you suddenly encounter cold wind in hot weather, it will also cause the tip of leek to dry and yellow.

It is difficult to control the weather of leek planted in the field, so we can do a good job in humidity management, strengthen loosening soil to cover the small arch shed, and the leek cultivated in the greenhouse can be properly ventilated to make up the light.

The most basic feature of leek pest outbreak is that leek leaves turn yellow. So many friends may be like me. When I first saw this problem, all kinds of leek diseases and insect pests came to my mind. Such as botrytis cinerea, leek maggots and so on.

In order to promote the vigorous growth of leek, many growers will apply a lot of fertilizers, such as manure, cake fertilizer, calcium superphosphate and so on. Most of these fertilizers are acidic fertilizers, which easily lead to soil acidification, while leeks are suitable for growth in neutral soil, and their growth will be inhibited under acidic conditions, and their leaves will turn yellow.

Reduce the use of such fertilizers, improve the soil environment and promote the growth and development of roots. Under the condition of ensuring the soil moisture in the field, reduce the amount and frequency of watering. Generally, the interval between sand and clay is short and long. After watering, intertillage loosens water and increases soil permeability. There is a great demand for the quantity and quality of leek at the end of the year, and good topdressing management is of great help to reduce the yellowing of leek leaves.

Now that the cause is found out, the prevention method is simple. It is hot and rainy in summer, so we can install sunshade nets for leeks and water them regularly to reduce the temperature of leek planting areas and provide a suitable environment for their growth.

Simply measure the ph value of the soil before planting, and control and adjust the pH value of the soil in time. Pay attention to interval fertilization when fertilizing. Acid fertilizer is not suitable for long-term application. Once the soil is acidified, appropriate lime powder should be sprinkled in time to adjust and neutralize the soil to ensure that the soil is acid-base neutral.