Can corn radicles rot still grow, the reason for corn root rotting

Corn root rot, also known as corn stem base rot (commonly known as root rot), is a new disease in the seedling stage of summer maize, and the area of occurrence has shown an expanding trend in recent years, and the disease is more serious in the basin. The diseased plant rate is generally 10 20%, the heavy one is 40 50%, and the individual plots can reach more than 80%, which has a great impact on the yield of corn. The disease usually presents after the wilting of the female ears of corn.

After the plant is susceptible, the leaves suddenly appear blue-gray wilt, like frost damage, and the roots and stem bases are soaked in water and rot, and gradually turn brown. Base of the stem.

In the third and fourth internodes, there is obvious water loss, softness and emptiness, and even dry shrinkage, and the plants are easy to lodging in the later stage; The roots are hollow and soft, brown or purple, the fibrous roots are reduced, and they are easy to pull up; The panicle droops, the panicle stalk is flexible, it is not easy to break, the panicle core shrinks, threshing is difficult, and the 1000-grain weight decreases significantly. According to the research of the Institute of Plant Protection of Shandong Academy of Agricultural Sciences, the disease is mainly infected by Pythium melon and fruit, and is combined with Fusarium graminearum. The results of the Institute of Plant Protection of Sichuan Academy of Agricultural Sciences showed that Pythium and Fusarium accounted for it, and the source of the disease was mainly transmitted by soil carriers.

In general, during the milk-ripening period, if the weather is hot, heavy rain falls suddenly, and the temperature is fused, the disease will occur quickly and severely. There are obvious differences in the severity of the disease among different varieties. Prevention and control measuresThis disease is a soil-borne disease, and in the absence of effective soil treatment agents, agricultural prevention should be the mainstay.

selection of disease-resistant varieties; Increase the application of potassium fertilizer to improve the disease resistance of plants; Sow seeds in a timely manner to avoid the harm of diseases to the critical growth period and reduce losses; Remove stagnant water in the field in time to prevent poor ventilation and affect root vitality and prevent diseases.

Summary. The first method of corn root rot 1, pine * water release and air permeability * high humidity of soil can lead to poor air permeability of corn roots, which affects nutrient absorption, and also causes root hypoxia and rot. 2. Apply a little potassium chloride to the hole about 10 cm of each diseased plant, about 2-3 grams.

Acidic* soil can be applied with 20-30 grams of plant ash. 3. It is unlikely to survive by chemical spraying now. The occurrence of this situation mainly lies in the seed dressing, some of which grow normally, and some of which are rotten, indicating that the seed dressing is wrong.

Because we are currently planting corn before planting, it is more important to prevent corn seed infection from eroding the seeds. According to whether there are more Fusarium, Rhizoctonia, or putret enzyme bacteria, targeted coating prevention should be carried out during seed dressing.

Corn root rot is a disease caused by Fusarium, etc., which mainly occurs in the seedling stage of corn. Causes of root rot: 1. Low-lying terrain, heavy soil clay and poor drainage; 2. Soil compaction and poor air permeability cause difficulty in respiring the root system and obstruction of root respiration, and water accumulation and rot of the roots; 3. Underground pests harm or planting wounds are not treated well, and infectious bacteria invade from the wounds, causing root disease.

The first method of corn root rot 1, pine * water release and air permeability * high humidity of soil can lead to poor air permeability of corn roots, which affects nutrient absorption, and also causes root hypoxia and rot. 2. Apply a little potassium chloride to the hole about 10 cm of each diseased plant, about 2-3 grams. Acidic* soil can be applied with 20-30 grams of plant ash.

3. It is unlikely to survive by chemical spraying now. The occurrence of this situation mainly lies in the seed dressing, some of which grow normally, and some of which are rotten, indicating that the seed dressing is wrong. Because we are currently planting corn before planting, it is more important to prevent corn seed infection from eroding the seeds.

According to whether there are more Fusarium, Rhizoctonia, or putret enzyme bacteria, targeted coating prevention should be carried out during seed dressing.

Root rot of maize is a soil-borne disease, and in the absence of effective soil treatment agents, agricultural prevention should be the mainstay.

1. Choose disease-resistant varieties.

2. Increase the application of potassium fertilizer to improve the disease resistance of plants.

3. Sow seeds in a timely manner to avoid the harm of diseases to the key growth period and reduce losses.

4. Remove stagnant water in the field in time to prevent poor ventilation and affect the vitality of the root system of the hail, and prevent diseases.

The disease mostly shows symptoms after the corn ear wilts, after the plant is susceptible, the leaves suddenly appear blue-gray wilt, like frost damage, the root system and stem base are soaked in water and rotted, and gradually turn brown. Base of the stem.

In the third and fourth internodes, there is obvious water loss, softness and emptiness, and even dry shrinkage, and the plants are easy to lodging in the later stage;

Summary. Root rot caused by Pythium: Symptoms are the gradual browning, softness, and decay of the mesocotyls and the entire root system. The growth of the root system is severely stunted, the plant is short, the leaves are yellow, etc.

Root rot caused by Rhizoctonia spp.: The lesions mainly occur on the fibrous roots and mesocotyls, and the lesions are brown and gradually expand along the mesocotyls. When the infection is severe, it can cause the leaves of the seedlings to wither and die.

Root rot caused by Fusarium: It is mainly manifested by dark brown rot of the young part of the root end and gradual necrosis of the tissue. The tips of the leaves turn yellow, and when the disease is severe, the plant dies.

Causes of rot in corn roots.

Hello, what's going on with corn root rot? Mainly caused by corn root rot, corn root rot is a disease caused by Fusarium, etc., mainly occurs in the seedling stage of corn, and its harm is to cause corn rhizome rot and plum rot, seriously affecting the yield of corn. There are many types of pathogenic bacteria that cause root rot, and the special car socks stalls are also different.

Root rot caused by Pythium: Symptoms are mesocotyls and the entire root system gradually browning, softening, and rotting. The growth of the root system is severely stunted, the plant is short, the leaves are yellow, etc.

Rhizoctonia spp. caused by rhizoctonia: lesions mainly occur on fibrous roots and mesocotyls, and the lesions are brown and gradually expand along the mesocotyls. When the infection is severe, it can cause the leaves of the seedlings to wither and die.

Root rot caused by Fusarium coarse: the main manifestation is dark brown rot of the young part of the root end, and the tissue gradually dies. The tips of the leaves turn yellow, and when the disease is severe, the plant dies.

Recommended for you corn root rot prevention and control methods 1, timely drainage, timely drainage after rain, to avoid straw returning to the field, seriously diseased fields to avoid straw stools, celery straw returning to the field, stubble removal and so on. These measures that can reduce the source of soil bacteria can be used to prevent root rot well. 2. Add potassium sulfate, potassium chloride or potassium-containing compound fertilizer to top dressing, and use 6-7 kg of pure potassium per mu as base fertilizer.

Row more hoes to raise the ground temperature. Strengthen fertilizer and water management to promote seedlings and growth. Prevent the return of diseased plants to the field and reduce the source of reinfection.

3. In areas where root rot occurs severely, corn seed coating should be treated with seed coating containing fungicide, or seed dressing with fungicide before sowing. 4. Chemical control is sprayed with 50% carbendazim or 70% methyl tobuzine 500-800 times + growth regulator at the base of the stem or sprayed with 300 times of root rot or 60g of Libacam mixed with water 30. If there is a case of root rot in the case of large surface fissures, it is best to replenish the seedlings or destroy the seeds as soon as possible.

Corn has excellent environmental adaptability and has high nutritional value. As a high-yield food crop in our country, corn is an important feed for animal husbandry and aquaculture, and one of the indispensable raw materials for food, medical and health and chemical industries. At the same time, corn also has many biological activities, such as antioxidant, anti-tumor, blood sugar reduction, immunity improvement and antibacterial, etc., which has a wide range of development prospects.

Corn root rot, also known as corn stalk rot (commonly known as root rot), is one of the most desirable diseases in the summer corn seedling stage. The incidence of planted corn in the basin is the most serious, and corn root rot will seriously reduce corn yield, and once this disease occurs, it will have a great impact on corn yield. After the corn is diseased, the leaves will suddenly appear blue-gray spots, the roots and the bottom of the stem will also be submerged and rot, and finally the infested part will gradually turn brown.

Corn root rot is mainly caused by stagnant water and poor soil water absorption, while low temperature, excessive rain and lesions of the corn itself can also cause corn root rot. So how to prevent and control corn rot roots, the following will give you a specific description of the prevention and control methods of corn rotten roots.

1. Drain water in time.

When there is too much rain, we should drain the water in the corn field in time to prevent water accumulation and then soaking the corn roots for a long time and causing root rot. After the corn is picked, we need to clean out the corn stalks or burn them on the spot, which can reduce the accumulation of water in the corn field. At the same time, this can also reduce soil bacteria, which can well prevent corn root rot.

2. Rational use of fertilizers.

We can increase the application of potassium sulfate, potassium chloride or potassium-containing compound fertilizers, using about 6-7kg of pure potassium per mu as the base fertilizer. Strengthen fertilizer and water management to ensure that corn can have sufficient nutrients to absorb to ensure the normal growth and development of corn.

3. Appropriate use of fungicides.

In areas with severe root rot, a paint containing fungicide can be applied to the area where the corn has rotten roots, or the corn seeds can be sterilized with a fungicide before sowing before sowing.

4. Actively respond to bad weather, especially do a good job in drainage.

Under normal conditions, root rot has a low incidence and does not cause serious yield problems. However, under special environmental conditions, especially in the spring and summer seasons, the rain will generally be more abundant, and if it is not drained in time, it is easy to cause water accumulation in the soil, which can easily lead to corn root rot. Therefore, we must do a good job in on-site management, especially in the management of water trails.

The biggest cause of root rot may be caused by corn stem base rot. In view of this situation, the common symptoms of general trace rocks are mainly corn at the end of milk maturity to wax maturity stage, most of the leaves show the symptoms of wilt wilt, a few are yellow wilt symptoms, and there are also the symptoms of sudden wilt of the whole plant at the milk maturity stage.

It is likely that the fertility of the soil is not enough, or it may be because of too much watering, or because it has been affected by natural disasters.

I think it has to do with man-made reasons, weather reasons, air reasons, land reasons and fertilization reasons.

Corn root rot may be caused by corn stem base rot, and its control techniques are as follows: Symptoms: The peak period of bacterial wilt is from the end of corn milk maturity to the wax maturity stage, most of the leaves show wilt symptoms from bottom to top, a few are yellow wilt symptoms, and there are also acute symptoms of acute solanacium in the whole plant at the milk maturity stage.

The base of the stem of the plant first turns yellow and brown, and then becomes soft, the inside is empty, or the diseased plant is folded, the fruit spike of the diseased plant droops, the bracts are wilt-like, the root system is poorly developed, the roots are few and short, and they turn black and rot, and the pith of the stem base can be seen red powdery mold (Fusarium), white villous mold (Pythium) or yellow-brown odor (soft rot bacteria) due to different pathogens. Pathogenesis: The pathogen may overwinter on the diseased and disabled tissues in the soil, and in the second year, it will grow rapidly from the stomata or wound of the plant, and the middle growth of corn will be rapid, the tissue will be tender, and the water and humidity will be high after rain between the leaf sheaths at the base of the stem, and it is most susceptible to infection.

High temperature and humidity are conducive to the onset of the disease. The disease will be aggravated by low-lying terrain, poor drainage, improper cultivation techniques, such as over-dense planting, excessive nitrogen fertilizer, poor ventilation and light transmission, and various damage to plants. Prevention and control methods:

l) Strengthen cultivation management, reasonable irrigation, pay attention to the rainy season to eliminate stagnant water, cultivate soil in stages, and cultivate pine in time to avoid all kinds of damage. After harvesting, remove diseased and residual plants from the field to reduce the source of disease. (2) The soil around the stem base can be picked up in time to reduce the humidity and infection, and then the stone can be cultivated after the peak period.

3) Timely uproot the diseased and down-to-back diseased plants to use them as fuel to avoid transmission. (4) Pay attention to reasonable dense planting.

(1) It may be related to seeds, and when there is a problem in the seed production process, it may also cause corn seedlings to rot roots.

2) It has a lot to do with the weather, too much rain will also make corn seedlings rot roots.

3) Sowing too early will also cause corn seedlings to rot roots, low temperature, slow emergence of seeds in the ground, will rot roots.

Anaerobic respiration in the roots, which causes the hair to roast and produce alcohol, which causes the roots to rot is also a cause!

The second possibility is that the soil is not soft enough!