Spring corn borborer occurs frequently, how to control spring corn borborer?

In the best drug control period of corn borborer, the best drug control effect is the annual corn trumpet stage or the 3rd instar pest (it will burrow into the corn stalk after the fourth instar), and in the control time period, the best control period from mid to late June to early to mid July, when the larvae are mostly concentrated in the corn heart. During this period, drugs such as phosphine granules, pyroxine, trichlorfon, kung fu methrin, and 10 imidacloprid can be sprayed after 4 p.m. for control. It is also possible to mix drug particles such as phosphine or Beauveria bassiana with fine sand or dry fine soil and sprinkle them into the heart leaves of corn to kill the larvae hiding in them.

Light trapping adults: Set up projected insecticidal lamps around the corn straw stacks or add sexual traps on projected insecticidal lamps to trap and kill adult corn borers day and night. Straw should be stacked in a centralized manner to ensure the effectiveness of prevention.

Now spray some pesticides, and in the process you should spray pesticides frequently to prevent pests and diseases, so as to ensure that these insects are cleaned up in time.

In case of such pests and diseases, you must spray pesticides in time, and you can buy them at the local agricultural product store. In this way, the spread of pests and diseases can be effectively improved.

When the corn is tasseled, the larvae of the heartworm burrow into the top ear and cause the flower ear to break off from the base. When the spike appears, the larvae move to the spike to gnaw on the filaments and young bracts, and burrow into the spike to gnaw on the tender grains. The most harmful to corn, not only to eat the leaves, but also to drill into the stalk to hollow out the stalk to affect the growth of corn, and even cause stalk breakage.

After the corn is eared, the borer larvae enter the ear again, eat the corn kernels on the ear, and in severe cases, the whole ear of corn can be hollowed out.

Then there is the disinfection and insecticide of seeds before sowing! These can greatly reduce the harm of the heartworm, if it is found that the damage of the corn heartworm is going to occur, it must be prevented by spraying before the corn earing! Once the heading is re-treated, the yield will be reduced!

And it also has a relationship with the pest of the second year! The first instar larvae eat the leaves of the corn and form an arrangement of mosaic leaves. The 2nd and 3rd instar larvae bored into the stalks, which harmed the bracts, male ears and female ears, and the nutrient and water transport of the damaged corn was blocked, the growth was weak, the stalks were easy to break, and the female ears were stunted, which affected the fruiting.

with pesticides"666 powder mix well, each corn flare to grab a small handful, this granule falls in the flare, will roll down with the growth of corn, forever in the heart of corn, will not fall on the ground to lose its efficacy, 666 powder is also a long-acting pesticide, a summer will not be invalid, because the granules are applied in the corn bell mouth for a long time, in the corn heart leaf stage, methyl isosulfonphos granules can be sprinkled into the heart leaf, in the ear stage, dichlorvos emulsifiable concentrate can be used to make water to make a solution, and then injected into the female ear.

Emamectin benzoate can last up to one to two months, which can make corn from the seedling stage to the heading stage basically do not suffer from insect pests, at most, that is, the corn ear stage to the maturity stage may suffer from insect pests, because everything is not absolute, as long as the fake pesticide is not bought, this control method is feasible and reliable. You can use the point sprinkler method, put the granules into the point sprinkler medicine bucket, and pinch each plant with the point sprinkler at the corn flare, or you can use the hand kneading method, and use the thumb and index finger to take a small amount of granules and sprinkle them into the heart leaf. When you are done, wash your hands with soapy water in a timely manner.

To start the prevention and control of corn borer before the third instar, you can return straw to the field, lose heart control, biological control, spraying control, etc., corn borer occurs in the early stage of the drug is better.

Pesticides can be sprayed in advance for prevention, and some better seeds can be selected for sowing, and disinfection treatment can be done in advance, which can be prevented to a large extent. It is best to spray at this time during the big flare period.

I think that when the corn grows, we should spray some antibacterial and insect control drugs on the corn, so that it can be effectively removed, and it will not cause any impact, and at the same time, it can also improve the yield.

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Corn borer can be sprayed with octyphos, methamidophos, chlorpyrifos, dichlorvos, trichlorfon and other agents to prevent rent and laugh. Generally, at the heart-lobe stage, methamidophos and cypermethrin can be mixed and diluted 1000 times in the ratio of 7 1 to perfuse the heart-leaf for control. At the panicle stage, 50% dichlorvos 500 times liquid or 90% trichlorfon 800 times banquet liquid can be sprayed with filaments and fruit ears for control.

Fill the heart with phosphine granules, or use red-eyed bees for control. 1. Skillfully grasp the appropriate period of prevention and treatment: the application of pesticides at the end of the corn heart leaf is the best period for prevention and control.

2. Master the appropriate dosage: use 3% phoxanthion granules per mu of corn field. 3. Application method:

Point scatterer method. Put the granules into the spreader hopper, hold the spreader in your hand, aim at the corn flare, and pinch each plant. Hand pinching.

Using your thumb and forefinger, take a small amount of granules and sprinkle them into the heart lobe. When you are done, wash your hands with soapy water in a timely manner.

Corn borer is the main pest of corn, and its larvae eat the main stem or ear of corn, which can break the main stem of corn, resulting in insufficient nutrient supply and poor pollination of corn, resulting in a decline in corn yield and quality. Many farmers want to know how to kill the corn borer and what medicine to spray the corn borer. Let's popularize it for everyone.

First, start from the population base of insects in the field.

By releasing the natural enemies of the corn borer, the control effect can be achieved, such as the release of red-eyed bees, black egg bees, etc. , lay eggs in the eggs of the borer, and kill the borer by feeding on the egg yolk and pupation, so as to achieve the purpose of suppressing the population of the borer in the field.

Second, from the perspective of controlling the number of adult worms.

Adult corn is phototaxis. Therefore, using this property, it is possible to control the black light in the corn field. Black light can emit invisible ultraviolet light with a wavelength of about 365 nanometers.

Although it looks similar to the incandescent bulbs we usually see, there are still a lot of differences. Why can we prevent and control pests? Mainly due to phototaxis pests, they have a pigment on their retina that can absorb a specific wavelength of light, causing a light response, and then tend to the light source, and when they encounter black light, they will fall into the container below, thus controlling the number of adult worms.

3. From the perspective of larval control.

Corn borer mainly harms corn in the form of larvae. Therefore, larval control is the focus of the whole control work. In practice, farmers basically use the method of spraying chemicals.

At present, there are many insecticides used for corn borer on the market, such as emamectin benzoate (emamectin benzoate), Bacillus thuringiensis, chlorantraniliprole, avermectin, etc. , or emamectin benzoate + chlorpyrifos, chlorantraniliprole + clothianidin.

Fourth, the specific choice of pesticides can refer to the following three factors.

It is to be selected according to the resistance of the local borer, if the resistance of the local borer is high, the compound pesticide is the main one;

According to the control of the use of pesticides in previous years, if a certain pesticide is used all year round, the control effect is good in the past, and the effect is getting worse and worse in the future, it is recommended to replace the pesticide;

The cost of different pesticides is different, and you should choose according to your own cost.

Corn borer mainly eats corn leaves, but also can eat into the stem, and the harmful symptoms are obvious. On the one hand, there will be gaps in the leaves eaten by the corn borer, and on the other hand, there will be holes in the stalks, and the inside of the stalks has been eaten by the corn borer, which is easy to fall off.

When a corn borer is found, it should be sprayed with pesticides in time, or the natural enemy that can release the heartworm is the red-eyed bee.

Spraying pesticides, choosing the right varieties for planting, paying attention to light, paying attention to watering, you can use some beneficial insects for control.

We can spray the soil with pesticides before planting corn, and then spray pesticides on time depending on the growth of the corn.

The borer is also called the three borer, the two borer. The trichem borer is an important rice pest in tropical to temperate southern Asia. In China, it is widely distributed in the main rice areas south of the Yangtze River Basin, and the borer is seriously harmed, especially in the coastal and riverside plains.

In recent years, the northern limit has reached 38°N, which is near Yantai, Shandong. In order to damage rice, the larvae burrow the rice plant and feed on the leaf sheath tissue, ear buds and the inner wall of the rice stem, resulting in dry seedlings, dead boots, white ears, etc., which seriously affect rice production.

Agricultural control. The first is to plough the land and reduce the source of insects. the second is to adjust the sowing period, so that the 3 to 5 true leaf stage of vegetable seedlings and the peak stage of vegetable borer are staggered; The third is to properly irrigate and increase the humidity in the field.

Chemical control. Spraying control must be carried out in the peak period of adults and larvae hatching. You can choose 2500 to 3000 times of emulsifiable concentrate, 800 times of BT wettable powder, which should be applied or selected as early as possible, or 21% killing emulsifiable concentrate 2000 times, 20% chrysanthemum or 10% chrysanthemum emulsifiable concentrate 1000 times, or kung fu emulsifiable concentrate 3000 times, or 10% more than Noble suspension 2000 times, or 20% fenvalerate emulsifiable concentrate 3000 times, or 5% Lefling emulsifiable concentrate 3000 times, or 10% Uranus emulsifiable concentrate 3000 times, or Baishude emulsifiable concentrate 2500 times, or 3000 times the liquid of the emulsifiable concentrate, or 100 times the suspension of chlorourea No. 3

At this time, corn is the most susceptible season to armyworms, the scientific name of this pest is called armyworm, this pest eats corn leaves and the harm is very serious, so it is necessary to prevent and control it in time.

You can sprinkle insecticidal pesticide armyworm powder on corn, or fight sandworm pyrethroid drugs, these drugs are low-toxicity and residue-free pesticides, which are relatively environmentally friendly pesticides, and the effect of window screens is also very good.

Corn borborer, belonging to the lepidopteran moth family, has a very mixed diet and is difficult to control. Below we briefly introduce how to control corn borerworm, so that you can recognize the harm of corn borer and master its prevention and control methods.

1. The harm of corn borerworm.

The corn borer insect mainly damages corn, but also sugarcane, rice, and legumes. The larvae drill the stem between the stalk and the leaf sheath to feed on the pith, which affects the nutrient transport, and the seeds of the affected plants are not full, or even have no seeds, and the damaged stems are easy to break.

The larvae also burrow into the male inflorescence to feed, causing the base of the inflorescence to break, and also feed on the filaments and young bracts of the female panicle, and can burrow into the cob or feed on the young and tender seeds.

Corn borer worm can generally cause a yield reduction of 10 20, and in severe cases it can reach 90.

2. Agricultural control of corn borborer.

1. Treat orange stalks to eliminate the source of overwintering insects. After harvesting, the insect-covered corn stalks are used as fuel or as manure. If the straw and manuscript shaft used as industrial raw materials cannot be used up in the current year, they should be sealed and stored and used every other year.

2. Combine field management to remove insect sources. For example, the use of seedlings, seedlings and fruit and vegetable pruning to remove plants with eggs or larvae, centralized destruction.

3. Biological control of corn borerworm.

1. Use BT, Beauverine, red-eyed cicada and other biological agents to control (during the oviposition period of corn borborer, artificial release of red-eyed bees; At the egg hatching stage, BT wettable powder was sprayed; In the heart leaf stage, the powder of the white jujube cherry and the fine soil are used to make the fungus soil dim sum).

2. In the adult stage, use black light or sexual attractants to trap and kill a large number of adults to reduce the next generation of insect pests.

4. Chemical control of corn borerworm.

The application of pesticides in the heart leaf stage of spring maize to control the larvae of the first stool mountain generation and the second generation of larvae in the heart leaf stage of summer maize was the best effect of applying granules in the bell mouth in the early stage of the heart leaf bundle.

With 1 phosphine granules, the dosage is 1-2 kg per mu, and 5 times of soil or fine river sand are mixed and sprinkled into the bell mouth; Or with or with cyanuric chlorochloride granules, mix 10 15 times cinder granules, the dosage of each plant grams.

The corn borrower worm in the ear stage can also be sprinkled on the leaf axils of the cob with the above-mentioned granules when the corn is silked 60, the leaf axils of the upper two leaves, the leaf axils of the next leaf, and the spike top filament, mainly protect the female ear, and the dosage can be appropriately increased a little compared with the heart leaf stage.

<>1. Drug loss: Chlorantraniliprole granules can usually be used to prevent and control heart worm one by one. 2. Use natural enemies:

The red-eyed bee can be used rationally to control the borborer, because it will lay eggs in the eggs of the borrower and cause damage to the borer. 3. Spraying pesticides: Generally, 1000 times of 5% chlorantraniliprole suspension can be sprayed to control borers, or 500 times of liquid carfenoxapyr and 500 times of liquid lice mites are used for control.

First, the control method of corn borborer

1. The drug is disheartened.

Generally, chlorantraniliprole granules can be used to control the heart worm one by one, and the control effect of this method is good, and the effective period is long, but it is more labor-intensive and time-consuming.

2. Use natural enemies:

The main natural enemy of the borer is the red-eyed bee, which lays its eggs in the eggs of the borer, thus causing some damage to the drillworm, so the red-eyed bee can be reasonably used to control the drillworm.

3. Spray pesticides.

1) It can be controlled by spraying 1000 times of 5% chlorantraniliprole suspension, and 500 times of liquid carfenapyr and 500 times of liquid lice and mites can be controlled.

2) It can also be diluted 1000 times of 1000 times of the liquid and then filled or sprayed for control.

4. Use corn stalks to return to the field.

The use of the most advanced corn straw returning machine can make the corn straw very broken, without feathering of the old mature larvae, and will also destroy the wintering place of the pest, to a certain extent, it can reduce the overwintering base of the borer.

Second, the harmful symptoms of corn borborer

1. When the drill worm drills into the corn stalk, it will have a certain impact on the growth of the plant, and it is easy to break and lodging after encountering windy days, thus affecting the yield. When it harms the male ears, it will affect the pollination of corn and cause a lack of grains.

2. The heartworm will burrow into the ear, and then gnaw on the corn kernel and discharge the manure, causing pollution to the ear, and the damaged corn kernel will be moldy, affecting the quality of corn, and the yield will be reduced.

3. Corn borer generally occurs in the north and south of China, but the generation of occurrence in the south and north is different, and 1-6 generations generally occur throughout the year. Because the temperature in the south is relatively high, the number of generations is relatively high, while the north generally occurs 1-2 generations, and in Shandong, Henan and Jiangsu, it generally occurs about 3 generations per year, usually mainly from the end of spring to the time of corn harvest.