What if the corn turns yellow and doesn't grow?

Corn is a very common crop, but sometimes it doesn't turn yellow. What if the corn doesn't grow yellow? Let's take a look at the solution.

1. Topdressing

Nitrogen fertilizer needs to be replenished, but if there is a lack of phosphate fertilizer, nitrogen fertilizer can not be made up, so in this case, it is necessary to apply phosphate fertilizer, nitrogen fertilizer or compound fertilizer to corn. The amount of fertilization can be according to the instructions on the fertilizer package, but fertilization should be carried out at the same time to preserve soil moisture or irrigation, there is no soil moisture can not guarantee the absorption of nutrients by corn.

2. Disinfestation

The main pests in maize seedling stage were cotton bollworm, golden needle worm, aphid, armyworm, thrips, Swedish pole fly, ground tiger, sunflower pink scale and so on. The nymphs and female adults concentrated in the base, root and leaf sheath of maize seedlings and absorbed juice, which caused the damaged corn leaf sheath to become yellow and dry at first. In time, 40% phoxim EC 500 Mel 1000 times solution, or other internal absorption insecticides 500 Mel 1000 times solution, are sprayed on the stem base or root irrigation of corn seedlings; (you can also rotate or reverse stubble, because the sunflower scale only harms Gramineae plants. Other pests can be treated with insecticides with high efficiency and low toxicity.

Third, watering

The drought in the later stage of corn leads to the shortage of water and the lack of nutrition supply, which leads to the yellowing of the lower leaves; the seeds are not watered enough before or after sowing, and the seeds can not get enough water, which affects the normal germination and emergence of seedlings. the emergence time is too long, resulting in weak seedlings and yellowing at seedling stage. In the later stage, the lower leaves of maize turned yellow before their husbands, gradually developed to the upper part, and died in severe cases. However, the leaf yellowing changes from the leaf tip, showing the inverted "V" word enlightened and gradually yellowing. In the process of yellowing, the leaf starts from the tip, then the edge of the leaf yellowes and dries up, and when it is serious, the whole leaf dies.

IV. Drainage

When the corn is flooded for a long time, usually more than 24 hours, the lower leaves will die quickly. Improper use of herbicides A small number of farmers arbitrarily increase the amount of herbicides; blindly mixed with other pesticides; the concentration of herbicides is too high; sprayers are interused; the effects of fake and shoddy herbicides on later cropping will cause corn yellow seedlings.

Some of the main solutions to corn yellowing are the above, and I hope these rescue measures will help you.