What do you know about corn pest control technology?

With the development of the economy, corn is not only used as a staple food, but also as a deeply processed product in the market. The conditions for growing corn are relatively easy to meet, so the planting area in the north is widespread. But corn in the north is susceptible to disease and pests.

Once corn is infected, the consequences can be very severe. So, what are the commonly used pest control methods for corn?

plant varieties that are resistant to corn rust should be more; strengthen field management, remove weeds in the field, and reduce the invasion of pathogenic bacteria; Scientific management, proper fertilization and watering to improve the resistance of corn to disease sources; In severe disaster areas, drugs can be sprayed at the onset of the disease, generally 2-3 times at an interval of about 8 days. For the general recurrence area, the corn should be harvested in time during the growth period to promote the growth of corn and reduce the occurrence of diseases. For the areas with severe disease, fungicides should be sprayed once before corn sowing and after emergence, such as fungus must be cured, bacteria should be eliminated, etc., and corn should be reasonably densely planted to reduce the re-infection of pathogenic bacteria.

For corn with yellowed leaves, carbendazim and other agents should be sprayed for disinfection at the beginning of the disease, and foliar sprays of antiviral agents, such as polyantimycin, should be carried out after the onset of the disease in maize, so as to increase the ability to resist the disease and reduce the impact of the disease on the corn. About 7 days after corn sowing, small brown round spots appear on corn leaves, and gradually expand, forming irregular dots on both sides of the leaves, which are the channels for pathogenic bacteria to invade from the leaf sheath, and can expand the lesions under high temperature and humidity. Severe lesions produce water-stained black spots, and the enlarged lesions can form black water-stained patches on the back of the leaves, resulting in the death of corn plants.

In the growth period, booting stage, young ear stage, flowering stage, grain stage, fruit expansion period and early harvest period, spray corn in time with 40% gramsan wettable powder 400 times, or 75% chlorothalonil wettable powder 100 times. After corn harvest to jointing and flowering stage, and after heading to heading stage, spray once each.

Corn pests and diseases should mainly prevent brown spot, corn leaf rust, and aphids, and apply pesticides at different times to prevent pests and diseases. Pay attention to cultivating good plants.

It is necessary to choose excellent varieties for planting, spray pesticides in advance, pay attention to ensure sunlight and temperature, but also ensure the humidity of the soil, and water regularly.

It is necessary to choose the right pesticides for irrigation according to the types of pests and diseases, and should also be watered in time, and fertilizers should be supplemented in time, and then the work of loosening the soil and irrigation should be done, and the dead branches and rotten leaves should be pruned off in time.

First of all, we should choose the right soil, timely watering and fertilization, strengthen water and fertilizer management, spray pesticides regularly, should prescribe the right medicine, and also need to spray some insecticides and sterilization agents, and do a good job in prevention and control.

<> cotton bollworm: release red-eyed bees to kill eggs at the early stage of oviposition, or use Bacillus thuringiensis preparations, aminoavermectin benzoate, chlorbenzamide and other spray control during the peak period of egg hatching.

Subterranean pests and thrips, aphids, planthoppers, beet armyworms, armyworms, cotton bollworms and other seedling pests: Seed coating agents containing thiamethoxam, imidacloprid, chlorantraniliprole, cyanamide and butanedicarbonyl compounds are used.

Double-spotted tarsal nematode: during the corn silk pollination period, when the average number of single spikes on the filaments exceeds 5, it should be controlled, using imidacloprid, thiamethoxam, cyhalothrin, cypermethrin insecticide spray, and spraying the liquid directly on the ear silk. Spray before 10 a.m. and after 5 p.m.

Corn aphid: In the area where aphids are common throughout the year, the application of thiamethoxam seed coating agent has a good control effect on corn aphids in the later stage. In the maize tasseling stage, spray aphids with thiamethoxam, imidacloprid, imidacloprid and other agents.

Spodoptera exigua: idle fields in late winter, stubble or stubble clearing before sowing, and clearing the corn sowing furrow cover; or on a seeder equipped with a ridge clearing device, directly remove the covering of the seeding furrow; Seed coating agents containing succinylurea, cyanoanthramidide and other medicinal ingredients are used for seed coating. Chlorbenzamide, emamectin benzoate, etc., can be used for emergency prevention and control, and spraying, poison bait or poison bait spraying toxic soil can be used.

Disease-resistant varieties, rational planting, scientific fertilization. At the end of the corn heart, spray benzoylmethylconazole, tenazolol, pyrazoleethyl and other fungicides and again every 7 to 10 days depending on the incidence. Brown spot disease is treated at the 8-10 leaf stage of maize.

The above are some of the main control measures for corn diseases and pests, I hope it can solve the urgent need and help you.

Spraying pesticides should be the best way to control corn diseases and pests, and pesticides can also be sprayed in the soil, which can also play a role in sterilization. Of course, you can also water more and fertilize more. This can also control these pests and diseases.

You can apply some fertilizer to the corn when planting it, and you can also use it as an insecticide. The best way is to sprinkle some pesticides on the corn, help the corn do the work of deworming, fertilize the corn, and choose better quality corn seeds.

There is a good way, first of all, it is necessary to pay attention to the fertility of the soil, and it should be watered and fertilized in time, and it is necessary to do a good job in seedling raising, which should be sprayed with pesticides and fungicides in time, and the temperature of planting should also be paid attention to, and ventilation should be done in time.

Choose the right varieties for planting, prepare in advance, pay attention to watering, pay attention to fertilization, and pay attention to spraying pesticides, so that prevention can be carried out in advance, and crop rotation must be made.

In the planting of field corn and wheat summer sowing corn interplanting corn, when the corn has seven or eight leaves, armyworm diseases and pests often appear, and if they are not controlled, it will not only affect the yield of corn, but also the rapid spread of pests and diseases. Pests and diseases occur in a single field, and crops within a radius of twenty or thirty kilometers will have different levels of armyworm pests and diseases in a week. The most serious corn seedlings have only one leaf left.

Once we find that there are pests and diseases in the corn field, we need to spray insecticides in time.

Once the corn seedlings show the onset of armyworm pests and diseases, look at the holes of different sizes on the leaves, and the corn seedling core, there are black particles, this phenomenon is the phenomenon of armyworm diseases and pests in corn fields. Corn field pests and diseases should be eliminated in the bud. When the corn seedlings are seven or eight leaves, the car can just enter the ground.

Pesticide spraying vehicles can choose to go to Belle. Herbicides can also be sprayed at the same time. If the corn seedlings are too high, they have to be manually irrigated or pumped to spray.

It is necessary to achieve early prevention and control of diseases and pests in corn fields in a timely manner.

Top rot is a general term for maize tip rot, which is a systematic infectious disease with diverse symptoms. Main diseases: the heart lobe of the victim plant is rotten and tightly wrapped from the base of the leaf, and the whole heart lobe can be pulled out by hand in severe cases, and the heart lobe of the mild plant cannot be twisted; Some leaves lose green, are transparent, brownish and rotten, the leaves are short and incomplete, and the edges of some leaves show notches and yellowing stripes like the front of the knife, and they wilt and die.

Pathogens generally invade from wounds or stem joints, heart leaves and other young tissues, especially after being infested by pests such as fungus horses, Swedish flies, aphids, etc., which will aggravate the onset of disease, high temperature and high humidity are conducive to the prevalence of diseases, and the disease is more serious in the south or field irrigation halls, low-lying or poorly drained plots.

When the corn flowers are beautiful, it also needs a pest control. Ability to choose to hang artificial red-eyed bees. It can effectively avoid the outbreak of corn heartworm.

At the same time, it will also reduce the occurrence of pests and diseases in the field in the coming year. Artificial red-eyed bees should be hung in the field and put in a large area. It is necessary to put it every year to effectively prevent and control the onset of corn fields and pests and diseases.

will appearCorn borer, armyworm, cotton bollworm, aphid, corn leaf mite, etc

In the face of this pest, it is necessary to spray pesticides in time, or learn to hang artificial red-eyed bees in the field, which can effectively avoid the onset of pests and diseases.

Corn rust, root wilting, heading period is relatively short, branches and leaves are yellow, corn large spot disease, these are the main course of disasters, after corn planting timely watering, to ensure enough sunlight, and to spray pesticides and nutrient solution on time.

Corn borers, aphids, ground tigers, cotton bollworms, armyworms, be sure to spray chemicals. Remove the problematic plants in time, strengthen field management, and pay attention to the density of planting.

Spot disease, powdery mildew, armyworm disease, corn borer, corn thrips, these are relatively common diseases, we must pay attention to spraying pesticides on time, choose the right varieties for planting.

Generally speaking, for corn pest control, it is necessary to select some excellent varieties of disease resistance as much as possible, and carry out relevant crop rotation, burn some diseased plants as much as possible, and strengthen relevant water and fertilizer management, which can be sprayed with relevant pesticides; The reason why there are more diseases and insects in corn is because of its large planting area, and it is also related to the suitable conditions of the climate.

To keep the soil moist, there must be a certain amount of light, and reasonable fertilization, weeding and insect control; Because corn is planted at a relatively high density and with high humidity, it is not ventilated and not transparent.

Spraying pesticides, cleaning up weeds, you need to clean up diseased plants, pay attention to water and fertilizer management, so that you can better let the plants grow, corn has more diseases and insects, it is likely that there is no crop rotation.

There are a total of 26 kinds of maize diseases, which are top rot, sheath blight, rust, powdery mildew, small spot, stem base rot, root rot, rough shrinkage, thrips insect disease, corn borer, curvularia leaf spot, aphids, cotton bollworm and herbicide pests, zinc deficiency, and improper fertilization. Large spot disease mainly harms leaves, and can be dangerous bracts when severe, and it is a blue-gray spot at the beginning of the disease, and then gradually spreads, and the whole leaf is covered with large irregular spots, and there is black mold on the spot. Small spot disease damages leaves and stems, and oval or rectangular spots appear at the time of onset, which can be prevented and eradicated by dilution spraying with amacida.

It must be controlled with chemical drugs, the first method, the drug is mixed with soil, with 50% phoxanthion emulsifiable concentrate, half a catty, mixed with fine soil, 50 to 60 kilograms, remember, be sure to mix well, get up early while the pests have not yet drilled into the ground, sprinkle around the corn seedlings, can prevent a variety of underground pests. The best time for the control of corn borer is the big flare stage, which can be sprayed with drugs such as 90 trichlorfon, 50 phosphine or borer 1, or according to 1 kg of 3 phoxanthion granules per mu or 30 ml of 1 emamectin benzoate mixed with 10 kg of fine poisonous sand into the heart leaves for control.

Pathogens generally invade from wounds or stem joints, heart leaves and other young tissues, especially after being infested by pests such as bacterialhorses, Swedish flies, aphids, etc., which will aggravate the occurrence of disease, high temperature and high humidity are conducive to the epidemic of diseases, and the disease is more serious in the south or field irrigation halls, low-lying or poorly drained plots. Choose disease-resistant varieties! Do a good job in the prediction of the occurrence of gray planthoppers, sow late in a timely manner, and change the wheat set of corn to summer live broadcast; Garlic potato and other stubble should be appropriately adjusted sowing date; Seed dressing, timely and effective prevention and control of planthoppers, and the diseased plants should be pulled out in time!

When the corn flowers are in full bloom, a pest control is also needed. There is an option to hang artificial red-eyed bees. It can effectively prevent the occurrence of corn heartworm. At the same time, it will also reduce the occurrence of pests and diseases in the field in the coming year. Artificial red-eyed bees should be hung in the field and put in a large area.

The main pests of corn seedling stage are armyworm, beet armyworm, thrips, wheat straw fly, etc., which can be sprayed with cypermethrin, phosphine, dichlorvos and other insecticides at the 2-3 leaf stage of corn.

Hello, corn breeding pest control:1Corn borer can be harmed by corn borer during the growth of corn.

The corn borer will drill the corn leaves, and then enter the heart leaves of the corn seedlings, which will adversely affect the growth of the corn. In the process of corn borer control, the growth habit and growth environment of corn borer should be fully mastered, and artificial methods should be adopted in the high season of corn borer. At the same time, natural enemies can also be used to control and cultivate natural enemies of corn borer, such as red-eyed bees.

Corn varieties with high resistance were selected and sprayed regularly. 2.The occurrence site of corn large spot disease is the lower part of the corn leaves, the leaves will wilt due to the infection of the large spot disease, and in severe cases, it will spread to the whole leaves, resulting in the death of the leaves, and the infection of the leaves or leaf sheaths will affect the grain quality of corn.

Therefore, in order to control the development of pathogens and avoid re-infection, the leaves that have been basically infected by pathogens should be removed and destroyed, and drugs such as chlorothalonil and carbendazim can also be sprayed. 3.Powdery mildew is a common disease of corn growth, which mainly occurs in corn ears, stalks, leaves and other parts.

The main causes of powdery mildew are: first, excessive application of nitrogen fertilizer, resulting in corn only growing stalks but not fruits, and the plant tissue becomes soft; secondly, because the smuty mildew can overwinter in the soil, continuous cropping will provide good hosts for the pathogens, which will increase the number of germs. Therefore, in order to effectively control the infection of powdery mildew and reduce the base of the pathogen, seed coating agent should be used to coat the seeds, and at the same time, excessive use of nitrogen fertilizer should be prevented as much as possible.