There are many farmers who find that corn has rotten hearts, what is the reason?

Wound infection corn rot is due to the fact that the wound eaten by the pest is not treated in time, resulting in rot. The corn needs to be pruned, the rotten parts of the corn need to be cut off with sharp scissors to avoid infecting other healthy parts, and the branches and leaves that grow too densely to improve ventilation between the plants. After spraying pruning, the corn should be disinfected.

It is necessary to buy a special disinfectant such as carbendazim or chlorothalonil from the market, then pour it into a watering can according to the dosage on the package, fill the watering can with water, shake well, and spray the solution on the corn plant. Provide waterIn the later stages of corn curing, plants can be watered with nutrient-rich river water or purified water to keep the soil moist.

It is best to water the moisture in the soil directly to avoid the cut of the corn from coming into contact with the water and prevent the wound from rotting again. Reasonable fertilization of corn has a great demand for nutrients during the growth process, which can provide balanced nutrients and improve the growth rate of plants. While providing nutrients for corn, it is also important to pay attention to the amount of fertilizer used.

It is best to mix the fertilizer with clean water and provide it to the plants to avoid damage to the fertilizer. The main cause of corn heart rot is the damage of pests, the most important of which are spotted weevils, corn thrips, corn borers, Swedish flies, etc. These pests feed on the wounds caused by the stems and leaves of corn seedlings, which can easily be invaded by bacteria.

When they encounter rainfall, it can easily cause heart decay, which is what we call rotten heart disease.

Symptoms of Corn Rotting Heart Disease Corn does not mean that heart rot will occur at a certain stage. This disease may occur in the whole growth and development process of corn, when corn seedlings suffer from heart rot, the heart leaves of the diseased seedlings will be deformed, the color of the leaves will change from green to light yellow, and there will be obvious traces of insect moths on the leaves. Others show that the plant is dwarf and produces yellow necrotic spots on the veins.

It is also possible that the panicle is underdeveloped, with few filaments and few grains. The occurrence conditions of corn heart rot There are three main conditions for corn heart rot. Overwintering pests have a higher survival rate, which means that the pest population increases during corn growth, increasing the damage to corn.

Some corn varieties are very attractive to this type of pest, so some corn is not affected by pests, and some suffer heavy losses, such as Hei 301, Suiyu 7, etc. The third is the impact of climate change on the growth of corn, such as the decline of corn resistance, which is also an important condition for aggravating corn rot. Prevention and control methodsIn order to prevent corn rot, it is first necessary to select varieties with strong resistance to diseases and pests, such as Dongnong 248; It is necessary to scientifically manage water and fertilizer to improve corn immunity; It should be carried out together with chemical control to prevent the occurrence of corn heart rot.

After the corn has rotten heart disease, the rotten part of the corn must be removed first, and then filled with medicine, so that the control effect is better.

Because there is too much rain these days, it will rain a lot to make the corn rotten and make the corn sick.

The occurrence of this phenomenon is caused by insect infestation. Because the adult barbel bugs carry viruses and like to parasitize corn.

The main cause of corn rot is that the adult barbel bug elephant punctures the stems and leaves of corn, thus introducing the virus. The virus invades and multiplies in large numbers, causing corn to rot. Due to the winter environment, the survival rate of the adult barbel bugs is relatively high, and in the summer, the eggs hatch new adults and the number increases.

Barbel bugs like to feed on parasitism, and the sugar content in corn stems and leaves is high. When the barbel bug absorbs the sap of the stems and leaves, it will transmit its virus to the corn, causing harm.

The main cause of corn rot is that the adult barbel bug punctures the stems and leaves of corn, thus introducing the disease. Corn rotten hearts can be mixed and matched with 10% imidacloprid 1000 times liquid and shasa insect agent**.

1. What's going on with the rotten heart of corn?

The main reason for corn rot is that the bearded bug is an adult, and the disease brought by the body will cause corn rot. Generally, the adult rate is higher in winter, and the temperature and humidity are suitable for hatching new adults in summer, which has a greater impact on corn, because corn stems and leaves contain a lot of sugar, barbel bugs transmit the virus in the body to corn when absorbing sugar, and multiply in corn stems and leaves.

The growth rate of corn is slow, the resistance is relatively low, and it is easy to aggravate corn heart rot.

2. How to cure corn rotten heart?

When the insects are in the heart leaves of the corn and cannot be sprayed on the diseased part of the corn, irrigation can be used to control it, with mild irrigation 1 time and severe irrigation 2 times. Corn plants with short plants can be irrigated with the help of bottle caps, the operation method is: pierce holes in the bottle caps, and then irrigate.

For corn plants that are relatively high, it is better to use a sprayer to remove the nozzle and fill the medicine.

Remove the rotten area before the control is carried out to prevent transmission to normal plants. When removing the diseased part, it is necessary to avoid injuring the female and male panicles, and the opening of the heart lobe promotes the normal development of a flare-like mouth, and the heading effect is good. The concentration and amount of pesticides should be according to the standard in order to have a good control effect.

After the corn is fllared, it is sprayed with potassium dihydrogen phosphate to promote the growth of corn.

3. Soil requirements for corn planting:

Corn planting has requirements for soil, and the soil quality of corn planting should be uniform and delicate, not too fertile or too barren, and it should be easy to drain and irrigate. After choosing the planting land, it is not possible to plant corn immediately, but to rectify the land so that the soil becomes soft and conducive to the growth of corn.

Corn sina, it may be produced in a humid environment, such a rotten phenomenon, moldy phenomenon spoilage, or other reasons, you are better off for this reason. Let's do a good job.

Most of the corn rot is caused by insect infestation, and the current high temperature and humidity are conducive to the invasion and onset of pathogenic bacteria, which then causes local ulceration.

The key is to treat insects. Common insect pests are corn thrips, corn borer, Swedish flies, etc., commonly used effective agents: Caixi, 30% acetamiprid, 10% imidacloprid, but the agent that is effective for all three insects is "Caixi" (spinomycin).

Due to the infestation of insects, the wound is easy for bacteria to invade, and there is a deformity, fracture, outer edge and tip rot disease accompanied by a strong odor, which is a typical bacterial disease. At the same time of insect control, add "agricultural streptomycin", spray in the morning and evening, focus on spraying the heart leaves, once every 5-7 days, 2 times in a row. 2.

If there is a pesticide damage, you can appropriately apply ammonium sulfate and other fertilizers to the damaged corn seedlings, and if possible, you can appropriately apply dixone to reduce the pesticide damage.

Corn rot is generally caused by pests and diseases, so it will lead to corn rot. Corn jointing stage should be fertilized skillfully, to master the amount of fertilizer and fertilization time, in order to avoid corn crazy growth, can play a role in strengthening stalks and promoting ears, reduce corn empty stalks, baldness and lodging. When the corn grows to 6-7 leaves, it is necessary to fertilize, and organic fertilizer can be applied per mu or strip with high nitrogen water-soluble fertilizer.

It should be noted that the amount of fertilizer can not be increased at will, which is easy to cause excessive vegetative growth, thereby affecting the reproductive growth of corn.

In the booting stage of corn, that is, after the corn appears "big flare", the female spikelets and florets of corn begin to differentiate, and timely re-application of bract fertilizer can promote the normal development of ears and increase grains, generally 14 days before heading. If the base fertilizer is insufficient and the growth of corn is weak, it is necessary to increase the amount of fertilizer, and the rotting farmhouse fertilizer and Yanwo microbial agent can be applied per mu, and at the same time, according to the soil moisture, appropriate watering to replenish the water.

In addition, it is best to apply controlled-release fertilizer for "shelling", and it should be noted that in order to prevent the seedlings from burning, holes or strips should be made at a depth of 6-8 cm from the plant at a depth of 7-10 cm. Most of the areas with general fertilizer retention can be divided into two and three applications. In principle, phosphorus and potassium fertilizers are fully applied, and nitrogen fertilizers are generally not higher than 20% and 30% of the total nitrogen rate.

Fungicides can be chlorothalonil, agricultural streptomycin or leaf blight; Insecticides include chlorbenzamide, pyrethroids, organophosphates, etc. Foliar fertilizers can be potassium dihydrogen phosphate and zinc fertilizers; The regulator can be halogen + zeatin, and the dosage of triasanol should be implemented according to the product instructions. Fields with little or no transient disease should also be sprayed in time for prevention and control.

When applying pesticides, it is necessary to avoid the flowering period and pollination period, and apply the medicine 1-2 times according to the condition, with an interval of 7-10 days. Corn heart rot can generally be controlled by 50% carbendazim grouting. First, 50% carbendazim is diluted into 500 times the solution, and then the liquid is injected along the stem, generally 50-100 ml per plant.

Corn rot can generally be controlled by 50% carbendazim grouting. After diluting 50% carbendazim into 500 times the solution, inject the liquid along the stem, and perfuse 50-100 ml per plant. In order to ensure that the corn can resume growth as soon as possible, zinc fertilizer and foliar fertilizer can also be applied, and then foliar fertilizer containing humic acid and amino acids, as well as mycotoxins and other drug retardants.

In order to reduce the probability of corn rot, plastic film covering cultivation technology can be used. The main reason for the rotten corn heart is that the flaxworm is like an adult, and the virus brought by the body will cause the corn rotten heart. Generally speaking, the adult rate is higher in winter, and the temperature and humidity in summer are suitable for hatching new adults, which causes great harm to corn.

Due to the large amount of sugar in corn stems and leaves, the bushworm absorbs the sugar and transmits the virus to corn, where it multiplies in corn stems and leaves. The growth rate of corn is relatively slow, and the resistance is relatively low, which is easy to aggravate corn heart rot. High temperature, high humidity and low-lying waterlogged plots were conducive to the epidemic of maize heart rot. Wounds caused by plant growth, insect pests or other causes are easy to invade corn heart rot pathogens; The occurrence of corn heart rot is also related to the herbicides left in the previous crops, which are easy to cause corn heart rot.

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The growth environment is not suitable for high temperature and high humidity, which can aggravate the disease, and the herbicide residue of tea crops before drinking is also related.

The soil planted is not fertile, the pH is not suitable, the moisture is not sufficient, the temperature is not suitable, the fertilizer is too little, and there are pests.

The main reason for corn rot is that flaxworms are like adults, and the virus will cause corn rot and cause great damage to corn.

Do you check if there are bugs? Generally, thrips and corn borers will cause rotten hearts, mainly because they will cause wounds and are conducive to bacterial invasion, especially in high temperature and high humidity weather, which is more conducive to rotten hearts. Prevention and control can be done with chlorfenamirid or imidacloprid plus agricultural streptomycin spray, which can not only treat insects but also prevent diseases, and the dosage and dosage are all on the package.

<> corn rot can usually be controlled by 50% carbendazim root irrigation, diluted 50% carbendazim into 500 times the solution and then poured along the stem, each plant can generally be irrigated 50-100ml. In order to ensure that the corn can recover its growth as soon as possible, zinc fertilizer and foliar fertilizer can also be applied, and then foliar fertilizer containing humic acid and amino acids can be sprayed. Generally, in order to reduce the probability of corn rotting, plastic film mulching cultivation technology can be adopted.

1. What pesticides are used to treat corn rottenness?

1. Corn rot can generally be controlled by 50% carbendazim root irrigation, first dilute 50% carbendazim into 500 times the solution, and then pour the liquid medicine along the stem, generally 50-100ml per plant.

2. At this time, zinc fertilizer and foliar fertilizer can generally be applied, and then foliar fertilizer containing humic acid and amino acids can be sprayed, as well as bacteria and other agents to help corn recover its growth as soon as possible.

3. In order to reduce the probability of corn heart rot, plastic film covering cultivation technology can be generally used, which can not only effectively reduce the incidence of corn heart rot, but also increase the effective accumulated temperature by 200-300, promote corn to mature early for 1-15 days, and also have the effect of increasing yield.

Second, what causes corn rottenness?

1. The rotten heart of corn is mostly due to the failure to treat the wound in time after the plant is gnawed out by the insect, which leads to the rot of the wound and the occurrence of rottenness.

2. When the corn has this situation, it is necessary to cut off the rotten parts with sharp scissors to avoid infection of other healthy parts, and you can also cut off the branches and leaves that grow too densely to enhance the ventilation between the plants.

3. After pruning, it is necessary to do a good job of disinfection, first prepare a special carbendazim, or chlorothalonil and other sterilizers and pour them into the watering can according to the dosage on the instructions, and then pour water into the watering can, shake the liquid and water evenly and then spray it on the corn plant.

4. When maintaining corn in the later stage, you can water the corn plants with nutrient-rich river water or pick up pure water to ensure that the soil is in a moist state. It should be noted that when watering corn, try to avoid allowing the pruning wound to come into contact with water to prevent the wound from rotting again.