Analysis of the Causes of Corn Seedling Death and Prevention and Control Methods
Corn is an important food crop, grown in many regions of our country, and its yields are generally quite high. I wonder if any of you have ever encountered the phenomenon of dead seedlings when growing corn. If you have, how did you solve it? How should we grow corn to prevent dead seedlings? Let us read the exciting content below together.
1. Symptom changes
Corn seedlings do not die instantly; there must be a process of change, so what we need to understand is what conditions may lead to eventual seedling death. Before corn seedlings die, the first phenomenon to appear is that the leaves lose their green color and gradually turn yellow. If rain occurs, the leaves will rot, and of course in some cases the leaves rot directly. If no attention is paid, more and more leaves will turn yellow, until the entire plant loses its vitality, and finally the stalk of the corn seedling collapses, resulting in death by withering. Alternatively, the stalk of the corn seedling rots and the plant dies.
⟦NL>2. Causes of corn seedling death
There are mainly several causes of seedling death in seedling cultivation. Simply put, they are pesticide damage, fertilizer damage, high temperature and drought, disease, and insect pests. Pesticide damage is mainly divided into four types, namely excessive pesticide dosage and concentration, improper use of pesticide types, improper pesticide application methods, and improper use of herbicides. Fertilizer damage mainly refers to excessive fertilizer concentration at sowing, or fertilizer being too close to the roots of corn seedlings, as well as fertilizer being scattered onto the corn seedlings during application. High temperature and drought means that when growing corn the temperature is too high, no cooling measures are taken, and there is no proper watering, causing corn seedlings to die from dehydration. Diseases are mainly seedling blight, brown spot, white spot, root rot, etc., while insect pests include aphids, leaf rollers, stem borers, mole crickets, cutworms, etc.
3. Prevention and control methods for corn seedling death
To minimize the occurrence of dead corn seedlings, the first thing is to choose corn seeds of good quality that are drought-resistant, disease- and pest-resistant, and heat-tolerant, then soak the seeds in a disinfecting solution before sowing, which can reduce diseases and insect pests. Also, use formula fertilizer and fertilize scientifically, applying at the right time and in the right amount, and do not scatter fertilizer on the seedlings or place it too close to the young seedlings. When spraying pesticides, use them according to the instructions, and mix the pesticide concentration reasonably; it should not be too concentrated, but it must still be effective. Herbicides must not be used too late, and the concentration must also be well controlled. Finally, in weather with higher temperatures, water in the morning and evening, which can not only lower the temperature but also ensure an adequate water supply.
4. What to do about dead corn seedlings?
What should be done after corn seedlings die? This is a question many people are quite concerned about. If the corn seedlings die shortly after emergence, then we can still replant corn seedlings. But if the death of corn seedlings occurs during the vigorous growth period, then we can only think of other ways, because replanting seedlings would be of no help to the corn yield. Usually we can use intercropping, for example, replanting soybeans, sweet potatoes, and the like in the corn seedling field, and the yields are also quite good.
I believe everyone has basically understood the content above, so in future planting you will also know what to do. Thank you for reading. If you have any other questions, please leave a comment and leave your footprint.