How to replant corn when seedlings emerge poorly? Find the remedy here

There are many factors that affect the corn emergence rate. If you want a high yield, emergence is crucial. How do you replant when corn seedlings emerge poorly? Let's take a look together.

1. How to replant when corn seedlings emerge poorly?

1. For those showing yellowing above ground, and when you pull up a corn seedling you find no root hairs, showing phytotoxicity, spray a plant growth regulator containing trace elements; after three days most of the yellowed corn seedlings can turn green.

2. For severely missing-seedling plots, dig up the seeds quickly to check the cause. Those that put out leaves underground but cannot push through the soil, or whose sprouts have died, mostly belong to phytotoxicity and should be replanted in good time.

3. Pay attention to weather changes. If rainy weather occurs, dig ditches in good time and do not let water accumulate. Sowing should not be too early; sow after the temperature is suitable.

2. Reasons affecting the emergence situation

1. Seeds: if you choose seeds from some irregular manufacturers, or old seeds, the emergence rate may be affected. When selecting corn varieties, be sure to choose varieties with strong sprouting vigor and strong stress resistance. Especially for new varieties, since little is known about their stress resistance, choose cautiously.

2. Soil caking: after the seeds are planted, if it rains heavily for several days in a row, the soil becomes caked, easily forming what we commonly call a “hard cap”; in this case, it is very hard for the corn seeds to push through the soil, and even if they come out, they are yellow and weak seedlings.

3. Temperature: the germination temperature of corn seeds is 6-7°C, and then as it steadily rises, germination gets better. If after sowing the temperature stays low, emergence will certainly be affected.

4. Humidity: too much rain leads to excessive humidity; in this case, the seeds remain soaked in water for a long time, which suffocates the seeds and ultimately leads to poor corn emergence.

5. Sowing method: if sown too deep, the seeds suffocate from lack of oxygen and the sprouts die; even if they grow out, they are thin and weak and not easy to survive. If sown too shallow, in case of drought, high temperature or windy weather, the seeds' water uptake is affected, which also leads to poor root growth, affects germination and forms weak seedlings.

6. Fertilizer damage: at sowing, the seeds are too close to the fertilizer; if rain then falls after sowing, the seeds are eroded by volatilized fertilizer during germination, causing poor emergence.

7. Pests: if there is no coating or no secondary coating at sowing, the seeds are gnawed and damaged by underground pests, affecting emergence. The main underground pests harming corn are wireworms, cutworms and white grubs.

Corn emergence can seriously affect corn yield. If corn emergence is poor, take remedial measures in good time; it is best to take preventive measures when planting corn.