What is the latest curling of corn leaves?

Corn is planted all over our country. When planting corn, we often encounter a lot of problems, which have a great impact on the growth of corn. Leaf curling is one of them, corn leaf curling will block the photosynthesis of corn and reduce the yield and quality of corn. So what on earth is the curling of corn leaves? Today, the editor will give you a brief introduction. Let's take a look at it.

1. Lack of high temperature, fertilizer and water

Different maize varieties have different requirements for growth environment, and their adaptability will also be different. As a result, the proportion of corn core leaves will be very different, around May every year, because the temperature difference between day and night is very large, so the leaf differentiation will be affected. As a result, five or six leaves of the plant begin to curl. If potassium is insufficient in the field, it will reduce the stress resistance of maize plants, and also lead to the phenomenon of leaf curling. Usually increase soil moisture, rainy season or watering to promote recovery and spraying foliar fertilizer, can speed up its recovery.

2. Causes of drug damage

In the process of corn growth, it is necessary to use pesticides reasonably to control pathogens and insect pests. However, attention should be paid to controlling the dosage and types of herbicides, for example, when using herbicides such as nicosulfuron, if corn seedlings have less than three leaves or more than five leaves, or if they are used or used too much in a high temperature environment, it is easy to cause drug damage to corn, resulting in leaf curling, wrinkling and other phenomena. In severe cases, it will lead to heart leaf rot, if the symptoms are mild, then it can be recovered naturally, and in serious cases, the heart leaf should be cut open manually in time. For the fields that cause drug damage, it is necessary to properly topdressing and watering and spraying foliar fertilizer to promote plant recovery.

3. Causes of insect pests

Insect pests are also a major cause of curling of corn leaves. Among them, there are common pests such as thrips, and thrips usually cause damage when there are about 4 leaves of corn seedlings. After maize seedlings were damaged by thrips, it was found that there were spots in the leaves and gradually faded in the spots. If you peel off the new leaves, you can see the thrips moving. At this time, we can use acetamiprid, ethyl germicidal and other agents for spray control. Mainly on the heart leaf, leaf back, if the leaf curling phenomenon is serious, then the twisted heart leaf should be removed manually.

4. Caused by top rot

Top rot is also one of the reasons for the curling of corn leaves. The disease can occur in the whole growth period of maize, and the leaves of the outermost layer of the heart leaves will wrap around the inner heart leaves of the plant, resulting in deformities, leaf curls and other phenomena. Rot can also be found at the base, so the prevention and control of top rot is also the main measure to prevent the curling of corn leaves. Among them, metalaxyl and carbendazim can be used for control, and appropriate amount of zinc fertilizer can be added to enhance the disease resistance of the plant.

The above is a brief introduction to the curling of corn leaves. That's all for today's introduction. This article is for reference only. I hope it can help you all.