Corn heartworm can seriously affect corn yield, how to control it?

We want to change the environment in which the larvae of corn borers grow. The growth habit of corn borer larvae likes to spend the winter on corn stalks. After obtaining the corn, we will collect the corn stalks, and then solve the corn stalks, such as burning them or using them to form biogas slurry from the soft biogas digester.

This reduces the total number of corn borers. At the time of corn planting, if there is no whole process of eliminating diseases and pests, it is very likely that there will be insect eggs in the case of corn just out of ears, climb up to the top of the plant, at this time, if you do not use chemical fertilizers, you can manually remove 3-4 leaves containing insect eggs, and then bury them in the field, or damage, so that it is not easy for other main stems to be affected by insect eggs, <>

However, the consumption of this kind of labor will be very large, and the timeliness will be relatively slow. The occurrence of corn borer worm is more commonly used, so it is necessary to strengthen the prevention of various situations, in the early process can spray some insecticidal fertilizers on the corn, so that in the future corn is not easy to occur disease situation. And it can be applied every once in a while to remove insect pests, which does not need to be used for a long time, and only needs to be applied once within 10 days, which can achieve the effect of efficient pest prevention.

I don't think it is possible to completely eliminate the corn borer worm completely by the insecticidal method, but only to prevent and assist in the insecticide. Once the insect infestation occurs, it is still necessary to rely on chemical fertilizers to control and remove the borerworm. The best time for prevention is to adjust the medicine in the later stage of the corn cob leaf, apply the dot sprinkling method, put the tablet into the utensils, and pinch each plant at the corn bell stage.

If you notice that the heart leaves of the corn have rows of neatly ordered small round holes, this is the conclusion that the larvae of the corn borer are bored before they are bored. When the corn is out of the ear, <>

The larvae of the heartworm will burrow into the top spike and cause the spike to break from the bottom. When the spike occurs, the larvae migrate to the spike to gnaw on the filaments and tender bracts, and burrow into the spike to gnaw the tender grains. There are also larvae that burrow into the corn stalks and gnaw, causing the corn to break when it drifts in the wind.

The corn plants damaged by the borer worm have unrounded grains, lack of grains, or wilt, and some even have no particulate matter, resulting in a serious yield limitation. For the planted summer corn, due to the high temperature, the borer damage is early, so it is necessary to prevent it in time. After the corn sprouts, the water can be sprayed with an insecticide solvent such as phosphine or chlorpyrifos.

When the corn is jointed, change the above drugs to spray the water once.

Corn borer is a very influential disease. Pesticides should be used for prevention. Paying attention to reasonable management during the growth period can improve the nutrients of the plant and can effectively prevent it.

At this time, you need to go to the local agricultural store to buy some corresponding medicines. Then according to the requirements of the store, reasonable proportion, correct use, in order to achieve the medicine to the disease, successful insecticide.

Spraying Beauveria bassiana, which can cause larval poisoning, disrupt metabolism and cause death, use frequency vibration insecticidal lamps to trap and kill its adults, and can also trap and kill other pests that are afraid of light.

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.

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.

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.

Different corn varieties vary in their resistance to corn borrower. When planting corn, if the hard-grained varieties are selected than the horsetooth-shaped varieties, it has a better effect in preventing corn borers. There are many natural enemies of corn borerworm, for example, the red-eyed wasp is released in the field during the egging period of corn borerworm, which can be good for the eggs and larvae of corn borerworm.

Control methods of corn borerworm1. Drug prevention and treatment

In the best drug control period of corn borrower, the annual corn flare stage or the 3rd instar drug control effect of pests is the best, in the control time period, from mid to late June to early to mid July, the larvae are mostly concentrated in the corn heart.

During this period, drugs such as phosphine granules, pyroxine, trichlorfon, kung fu methrin, and 10 pyridoxine can be sprayed after 4 p.m. for control.

We can also mix the drug particles such as phosphine or Beauveria alba with fine sand or dry fine soil and sprinkle them into the heart leaves of corn to kill the larvae hiding in them.

2. Variety control

Different corn varieties vary in their resistance to corn borrower. When planting corn, if the hard-grained varieties are selected than the horsetooth-shaped varieties, it has a better effect in preventing corn borers.

3. Prevention and control before sowing

Corn borer can overwinter in the stalks or cobs of corn, so after the corn is harvested, it is completely removed from the field of broken branches and straws, diseased plant residues, etc., and removed from the field for deep burial or incineration.

We were able to control the insect source in the field very well and reduce the number of borborer insects in the following spring.

4. Prevention and control of natural enemies

There are many natural enemies of corn borerworm, for example, the red-eyed wasp is released in the field during the egging period of corn borerworm, which can be good for the eggs and larvae of corn borerworm.

5. Trap and kill adult insects

Adults of corn drill Heyu heart worm are nocturnal and have strong phototaxis, so we can trap and kill the adults who come out at night by setting black lights in the field after evening or using sexual attractants during the adult peak period.