Diagnosis and Prevention of Maize Red Seedlings

It is now an important period for maize seedling management. Some farmers report the phenomenon of maize red seedlings. The technical staff of the Qingfeng County Agriculture Bureau of Henan Province made a summary of this phenomenon: the purple-red corn plants at the seedling stage are called “red seedlings”. . This phenomenon mostly appears from the 3-leaf stage to the 4-leaf stage of the corn, and it does not fade even when it grows to 7 leaves to 8 leaves. There are only some red or purple leaves. In severe cases, the entire leaf sheath and stem are purple-red. There are many reasons for the occurrence of "red seedlings", which are mainly caused by the following reasons.

One is the lack of phosphorus in plants. Phosphorus in the soil can not meet the growth needs of maize seedlings, and the growth of roots is hindered, and seedlings grow slowly. As the content of phosphorus in seedlings gradually decreases, the leaves turn red or purple from dark green.

The second is the accumulation of water in the fields. Poor drainage in the field and high soil moisture affect the respiration and metabolism of the root system, hindering the growth of the root system, resulting in malnutrition and redness and purple of the plant.

The third is the harm of underground pests. The roots of the seedlings were bitten by underground pests, and their ability to absorb water and attract fertilizers became weaker, resulting in weaker seedlings and the formation of red seedlings.

Fourth, other reasons. The soil is too viscous, sowing too deep or shallow, and improperly fertilizing cause "burning seedlings." Improper treatment of pesticides to introduce seedling poisoning will lead to "red seedlings."

For the above reasons, the following measures can be taken to prevent and control:

1. Early application of phosphate fertilizer, mainly to fast-acting phosphate fertilizer, per acre can be applied to calcium phosphate 10-15 kg, can also be combined with pest control spraying 1% of superphosphate calcium leachate.

2. Level land and dig drains so that the rain stops and the fields do not accumulate water.

3. Do a good job of prevention and control of underground pests, so as to soak seeds or seed dressings, it is best to use coated seeds.

4. For sowing shallow or early seedlings, timely watering, cultivating soil loose soil to protect strong seedlings.


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