What are the causes of corn seedling death and the 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 encountered the phenomenon of seedling death when growing corn. If you have, how did you solve it? How should we grow corn to prevent seedling death? Let us read the excellent content below together.
1. Symptom changes
Corn seedlings do not die instantly; there is definitely a process of change, so what we need to understand is which conditions may lead to final seedling death. Before a corn seedling dies, 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 in some cases the leaves rot directly. If no attention is paid, more and more leaves will turn yellow until the entire plant loses vitality, and finally the stalk of the corn seedling collapses, eventually leading to death by withering. Alternatively, the stalk of the corn seedling rots and the plant dies.
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: excessive pesticide dosage or concentration, improper selection of pesticide type, improper pesticide application method, and improper herbicide use. Fertilizer damage mainly refers to excessive fertilizer concentration at sowing, fertilizer being too close to the roots of corn seedlings, or fertilizer being scattered onto the corn seedlings during application. High temperature and drought means that when corn is planted, the temperature is too high, no cooling measures are taken, and there is no proper watering, causing corn seedlings to die from dehydration. Diseases mainly include seedling blight, brown spot, white spot, root rot, and so on, while insect pests include aphids, leaf rollers, stem borers, mole crickets, cutworms, and so on.
3. Control methods for corn seedling death
To minimize the occurrence of corn seedling death, the first step is to choose corn seeds of good quality that are drought-resistant, disease- and pest-resistant, and tolerant of high temperatures. Then soak the seeds in a medicinal solution for disinfection before sowing, which can reduce diseases and insect pests. Also, use formula fertilizer and apply fertilizer 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 seedlings. When spraying pesticides, use them according to the instructions, and mix the pesticide concentration reasonably; it should not be too strong, but it must still be effective. Herbicides should not be used too late, and the concentration should also be controlled well. Finally, in hot weather, water in the morning and evening, which can not only lower the temperature but also ensure an adequate water supply.
4. What should be done if corn seedlings die?
What should be done after corn seedlings die? This is a question many people care 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 methods, because replanting seedlings would not help 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 also know what to do, right? Thank you for reading. If you have other questions, please leave a comment and leave your footprints.