Are the natural enemies of armyworms voles, and the environmental relationship of armyworms

Not a vole. There are many natural enemies of armyworms, such as frogs, sparrows, swallows, birds, mites, nematodes, ants, walking insects, black egg wasps, moths and cocoon bees, parasitic flies, bumme bees and parasitic bacteria, polyhedrosis viruses, etc., which can play a certain role in inhibiting the occurrence of armyworms. The control effect of the armyworm control agents butylthiocarthiochlors, xanthion, and diaformamidine alone in the control of armyworm was greater than that of carbosulfaner greater than that of carbofurans in the order of double thyroid glands.

Carbofuran butathione was mixed with phosphine at 1:4, and the synergistic effect was significant. Metamidine with carbofuran butylthione and amitramidine with phoxanthion 1:

1. Mix with synergistic effect. In the early instar stage of larvae, timely control of their pests

There are many natural enemies of armyworms, such as frogs, sparrows, swallows, birds, mites, nematodes, ants, walking insects, black egg wasps, moths and cocoon wasps, parasitic flies, bumblebees and parasites, polyhedrosis viruses, etc.

The natural enemies of armyworms are mainly sparrows and frogs. Dragonflies, etc.

There are many natural enemies of armyworms, such as baby nematodes, parasitic wasps, parasitic flies, etc.

The number and timing of armyworms have a great impact. Armyworms are suitable for warm and high humidity conditions, the suitable temperature of each insect state is between 10 and 25 degrees, the suitable relative humidity is more than 85%, and the suitable temperature for adult eggs is 15 30 degrees, and the relative humidity is about 90%. Humidity had little effect on egg hatching, but had a great effect on larval survival rate, especially on young larvae, and the mortality rate of instar larvae was at 23 degrees Celsius, when the relative humidity was 50%, respectively.

Effects of feeding conditions: Adults must eat large amounts of carbohydrates (mainly sugars) for the ovaries to mature and lay eggs normally. Armyworm larvae develop rapidly and weigh when feeding on grasses, and lay a large number of eggs after emergence. The larvae of thistles and alfalfa eat slow development and emerge into adults and cannot lay eggs.

The influence of cultivation technology: adults like to lay eggs in wet, dense crop growth plots, and there are many eggs in weedy plots in the field, therefore, armyworm occurs more in densely planted, fertilized, good irrigation conditions, and lush growth of wheat, millet, rice fields or corn and sorghum fields with more barren grass.

Influence of natural enemies: There are many natural enemies of armyworms, including frogs, ants, walking insects, spiders, lacewings, armyworms, cocoon wasps, armyworms, parasitic flies, nematodes and armyworms.

Corn armyworm, one of the common pests in the process of corn growth, basically occurs in the area where corn is planted, and is very harmful, also known as "marching bug". The assistant remembers watching the news before. Corn armyworm is large somewhere, and corn seems to have experienced disaster after armyworm.

The petiole is almost finished. Corn armyworms mainly eat leaves. When armyworms are 1-2 years old, you will find many small holes in the corn leaves.

If the armyworm grows to 3-4 years old, there will be a large area of bite marks on the leaves. If you don't leave it and let it multiply, the entire leaf will be eaten, and the loss will be great. The severity of corn armyworm is closely related to local precipitation and humidity.

If there is a lot of precipitation in the local area this year, and the humidity in the soil and air is high, the corn armyworm is generally more serious in the area, and the plots with excessive planting density and poor field ventilation may also occur.

But armyworms are one of the common pests, so there are many ways to prevent them. For example, you can use the breadth of armyworms to use booby-traps, insecticidal lamps, etc., and you can also use natural enemies to prevent parasitic wasps and parasitic flies. Of course, people most often use chemicals, corn armyworm belongs to the lepidopteran pest, about corn armyworm, the helper first said so much, in fact, corn growth encounters insect pests is a normal phenomenon, but we must prevent it in time, can not delay the best prevention time.

None of us want to see a final reduction in production.

Armyworms, also known as shaving insects and marching insects, are polyphagous, migratory and large pests that harm food crops and pastures. Crop leaves can be planted when it occurs, but in the first year, when the larvae migrate in groups, almost all green crops will be plundered, resulting in a large area of yield reduction or water conservation.

Adults have strong properties such as soup liquid and black light, and larvae are harmful day and night, and have the habit of feigning death and group migration. Armyworms like humidity and are afraid of high temperatures and droughts, with a relative humidity of more than 75% and a temperature of 23 to 30, which is conducive to the laying of eggs by adults and the survival of larvae. But with too much rainfall, especially after a storm, the armyworm population decreases significantly.

Corn seedling eggs are mostly laid at the tip of the leaf, and the eggs at the stage of the mature cycle are mostly laid in the flower room of the ear bud or the ear. Gums are secreted during childbirth, and eggs are pasted or overlapped on the leaves to form egg masses. When there are 20-30 larvae in 100 plants of corn and sorghum seedlings, and 50-100 larvae in 100 plants of corn in the middle and late stages of growth, it is necessary to prescribe the right medicine to prevent it.

Before the larvae are 3 years old, the active ingredient of No. 1 is 15-30 grams per hectare, or the active ingredient of No. 3 drops is 5-10 grams, and after adding water, spray with a certain spray or ultra-low volume spray, the field validity period reaches 20 days. It can also prevent 50% new butter 1500 times liquid or chrysanthemum resin insecticide spray.

There are many natural enemies of armyworms, including frogs, birds, bats, spiders, nematodes, mites, predatory insects, parasitic insects, parasitic bacteria, viruses, etc. Among them, the armor can eat a large number of armyworm larvae, and the armyworm pine fly has a high parasitism rate on the first generation of armyworms. Armyworm black egg wasp parasitic rate is high, armyworm orchid nematode has a high parasitic rate of armyworm larvae in some areas, sparrows, bats, ladybugs, mite-eating insects, grass insects and other young larvae can prey on young larvae, and all localities can pay attention to protection and utilization according to local conditions.

Adults can be trapped, sweet and sour pots or poplar branches can be used, and frequency vibration insecticidal lamps or black lights can be used to trap adults, and they can also be sprayed at the young age of larvae to be controlled in the form of pesticides.

Biological control of corn armyworm 1At the larval stage, 200 ppm dichlorobenzosaurons 1-3 are more effective against moth larvae, it does not kill natural predators, is safe for crops, and does not cause small amounts of pollution to the environment. 2.

Oocyte attraction and egg collection: Before hatching, the eggs are removed using the oviparous habits of the adult worms. From the beginning of the spawning period to the end of the peak period, a small handful of cereal grass is planted in the field, and sweet and sour wine is poured on the stem of the grain to allow the moth to lay eggs.

The results are so good that this is the time to collect the egg masses and remove them.

For the prevention and control of pesticide spraying, the commonly used agents can be selected emamectin benzoate, matrine, cyhalothrin and sweet kernel thuringiensis for prevention and control. When spraying, it should be evenly sprayed on corn plants, heart leaves or on the surface, and when sprayed on the surface, it should be as thoroughly as possible to effectively kill the armyworm larvae in the soil.

Corn armyworm, corn in the growth process, one of the most common pests, basically in the area where corn is planted, the harm is great, also known as the "marching bug", the little helper remembers that I saw a news before, a large outbreak of corn armyworm in a certain place, after the armyworm passed, the corn seemed to have experienced a disaster, the leaf stem was almost eaten all gone, very scary, however, this situation is not common, we see the corn armyworm, the number is small, but if it is not controlled in time, It will also have a great impact on corn yields.

Corn armyworm mainly eats leaves, when armyworm is in the 1-2 instar, it will be found that there are many small holes on the corn leaves, that is, armyworm eats, as armyworm grows to 3-4 instar, the leaves will appear a large area of bitten phenomenon, if you do not prevent it, let it reproduce, the whole leaf will be eaten, the harm is particularly serious.

It is observed that the severity of corn armyworm occurrence has a great relationship with local precipitation and humidity, if the local precipitation is more this year, resulting in an increase in the humidity in the soil and air, under normal circumstances, the occurrence of corn armyworm in the place is more serious, and the planting density is too large, and the plot with poor field ventilation will also increase the probability of armyworm.

However, because armyworm is one of the common pests, so in the prevention and control, there are many methods, such as the use of armyworm phototaxis, you can use traps, insecticidal lamps, etc., you can also use natural enemies to control, such as parasitic wasps, parasitic flies, etc., of course, the most commonly used chemical agents, corn armyworm belongs to the lepidopteran pests, so the commonly used agents are: emamectin salt, cypermethrin, Kangkuan, etc., can not be prevented once, a few days apart, again, in addition, with the continuous enhancement of the resistance of armyworms, In the choice of medicine, we should not use one medicine all year round, if a certain medicine has average control effect, it is recommended to try another one.

We can spray a small amount of pesticides when the corn grows to prevent too much spillage from causing damage to the growth of the corn.

Use plant-specific insecticides, evenly spray on plant leaves, and should not be watered during the medication, otherwise there is no effect, and you can consolidate it several times.