What should I do if the corn is yellow and does not grow, what is the reason why the corn leaves are

Zinc deficiency in maize first appears in new shoot leaves, when moderate to severe deficiency, the leaves are small and deformed, the internodes are shortened and clustered, and some are still accompanied by leaf yellowing symptoms, and the leaf veins are yellowed and yellow-green, but the part adjacent to the leaf veins remains green. In the corn seedling stage, the middle and lower part of the new leaves are yellow and white to form white seedlings, also known as flower white seedlings, zinc deficiency after jointing, yellow and white stripes appear in the lower half of the leaves, which are translucent, like silk and plastic film, and are easy to tear when blown by wind, which is called mosaic leaf stripe disease. It can be sprayed with rooting agent plus amino acid foliar fertilizer and zinc sulfate.

Spray continuously every 5 to 7 days.

It doesn't take long for corn leaves to turn yellow. Many corn growers believe that corn is deficient in nitrogen, not necessarily nitrogen. There are several main reasons why corn leaves turn yellow:

Corn diseases cause corn seedlings to turn yellow.

Bacterial wilt is the main cause of yellowing of the lower leaves.

Corn seedlings turn yellow due to lack of water.

Drought in the later stage of maize leads to water and nutrient shortage, and the lower leaves turn yellow.

Corn seedlings turn yellow due to nitrogen deficiency.

In the later stage, the lower leaves of maize first turn yellow, and gradually develop to the upper part, and the lower leaves die in severe cases. However, the yellowing of its leaves begins to change from the tip of the leaf, showing an inverted "V" shape and gradually turning yellow.

Potassium deficiency in corn causes corn seedlings to turn yellow.

In the process of leaf yellowing, it starts from the tip of the leaf, then the edge of the leaf turns yellow and dry, and in severe cases, the whole leaf dies.

Flooding of corn causes corn seedlings to turn yellow.

Corn is flooded for a long time, generally for more than 24 hours, and the lower leaves will die quickly.

First of all, the problem of yellowing of corn leaves is a very common thing, generally speaking, the main factor is the lack of nitrogen fertilizer, because nitrogen fertilizer can play a role in promoting growth and strengthening plants during the growth process of corn, otherwise the lack of nitrogen fertilizer supply is insufficient.

Secondly, the factor of low temperature, low temperature or low growth temperature in the ground, will affect the germination rate and growth of corn in the field.

3. The reason for high humidity or watering transition. Corn is a drought-tolerant crop that is suitable for cultivation in arid and semi-arid northern regions, and if it encounters watering transitions and waterlogging tolerance, it will affect the growth of corn.

4. In the process of removing weeds in the corn field, the herbicide used is mistakenly hit on the corn plant, and the corn will not grow much, and the leaves will turn yellow and even die.

5. Diseases and insect pests, generally too many rainy days, corn seedlings will get blight, the leaves gradually yellow and dry up from bottom to top, the root growth and development is poor, and the corn seedlings are weak and yellow.

In order to solve the problem of yellowing and not growing leaves in the growth process of corn, it is recommended to use organic fertilizer and trace element fertilizer (nitrogen fertilizer, phosphate fertilizer) reasonably, and the watering should be moderate; Another is to use good pica foliar fertilizer to alleviate the yellowing of corn.

One is that the weather is dry, and when there is a drought, the upper leaves of the young corn plant are rolled up and dark.

The second is pests and diseases, such as seedling blight, cultivated sunflower mealybug, etc.

The third is the lack of growth elements, such as nitrogen, phosphorus, potassium, magnesium, iron, etc.

Fourth, drug damage.

It may be caused by a zinc deficiency, and I suggest you use some zinc fertilizer. Maybe it would be fine.

There is also the possibility of drought and flooding.

Of course, there is a shortage of water and fertilizer!

Corn (Latin name: Zea Mays L.).) is an annual herbaceous plant of the genus Poaceae.

Aliases: maize, cob, baogu, baomi, baosu, jade, bud rice, pearl rice, bract, large reed millet, Northeast Liaoning dialect called pearl grains, Chaozhou dialect called barley kernel, Cantonese called corn, Hokkien called panwheat.

If the corn seedlings are seriously short of water, then it will be yellow and not long, long-term rainy weather will make the corn seedlings lack of light and root rot, so that it will also be yellow and not long, if the nutrients are insufficient, the corn seedlings may also be yellow and not long, and it may be caused by diseases, at this time it is necessary to use drugs to prevent and control.

1. Insufficient moisture

The growth of corn seedlings needs sufficient water, if the moisture in the soil is insufficient, then the corn seedlings will appear yellowing and not long, at this time, it is necessary to replenish water to the corn seedlings in time, keep the soil slightly moist is the most appropriate, pay attention not to water too much, otherwise it will affect the root system of the corn seedlings.

2. The climate is unpleasant

Corn seedlings are not yellow, and may be caused by unsuitable climate, corn seedlings like to grow in sunny places, if the weather is rainy for a long time, then the corn seedlings will be insufficient in light, and there will be too much water in the soil, so that the corn seedlings may rot the roots, so it can be yellow and not long.

3. Insufficient nutrients

Corn seedlings are not yellow and do not grow, and may be caused by insufficient nutrients, we can apply some thin rotting fertilizer to corn seedlings, and also spray some trace element foliar fertilizer for them, so as to improve the phenomenon that it is not yellowing and not long, pay attention to not apply raw fertilizer or thick fertilizer to corn seedlings.

4. Causes of diseases

Corn seedlings are not yellow and do not grow, and there may be a disease, in this case, it is necessary to pull out the seriously damaged corn seedlings to avoid the spread of germs, and then spray the corn seedlings with sterilization agents to kill the germs, so that the corn seedlings can grow healthily.

Symptoms: yellowing of corn leaves is a physiological disease, which is caused by potassium deficiency, mainly manifested as corn dwarf, narrow and long, drooping, the length of the leaf and the stem node is out of proportion, the tip and edge of the old leaf are like hot water, and the later stage becomes brown and scorched, which is manifested as the difference between diseased plants and healthy plants in different plots or different fertilizer varieties in the same plot. **Measures:

When corn is sown, apply 5 to 7.5 kg of potassium chloride or tri-element compound fertilizer per mu. When the corn is fertilized for the first time, combined with the use of other fertilizers, about 15 kg of potassium chloride is applied per mu. For the fields with rotten and yellowed corn plants, it is necessary to spray 0.2% to 0.3% potassium dihydrogen phosphate solution in time, and apply organic liquid fertilizer or Yunda 120 and other plant growth regulators with nuclear tan.