What are the measures that can control locusts What are the dangers of using general pesticides 100

There are a few:

1。improve the ecological environment of locust areas, such as building water conservancy, cultivating wasteland, and protecting and utilizing natural enemies;

2。Appropriate control, to control young nymphs, but also to protect seedlings for the purpose;

3。Pesticide control: spraying or dusting, poison bait trapping. The agents include dimethoate EC, methylisothion EC, dichlorvos EC, trichlorfon and so on, please refer to the instructions for specific use;

4。Artificial extermination, it is better to dig up the egg masses in spring and autumn.

The use of general pesticides can lead to pesticide residues and locust resistance, so pollution-free pesticides are recommended.

Summary. Cypermethrin is an insecticide and acaricide that is moderately toxic, has contact killing, stomach toxicity and a certain repellent effect, and has no systemic and fumigation effects. It is a nerve agent that acts on the nervous system of insects, causing insects to be overexcited, paralyzed and killed.

It is very effective in killing locusts.

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How many grams of cypermethrin are used to kill locusts per mu?

Hello, locusts can be used methylmethamidophos, trichlorfon, cypermethrin, deltamethrin, avermectin, phosphine and other pesticides, it is recommended to kill the effect in the locust nymph stage.

How effective is the drug cypermethrin in killing locusts?

Cypermethrin is an insecticide and acaricide that is moderately toxic, has contact killing, stomach toxicity and a certain repellent effect, and has no systemic and fumigation effects. It is a nerve agent that acts on the nervous system of insects, causing insects to be overexcited, paralyzed and killed. It is very effective in killing locusts.

How many grams per mu can achieve the effect?

Generally, 20% emulsifiable concentrate or 20% water emulsion, or 20% wettable powder 1500 2 000 times liquid, or 10% emulsifiable concentrate or 10% microemulsion 800 1000 times liquid, evenly sprayed.

How many grams of medicine is 800 times liquid?

Use 20% deltamethrin EC 20 30 ml per acre.

Understood, thank you, teacher.

To mix 1500-2000 times with water.

You're welcome I use an aircraft to prevent and control it, and it can't be 1500 times the liquid, and the aircraft has a high concentration and ultra-low spray.

Then you can choose 1000 times the solution.

Specific prevention and control methods for locust plagues.

1. Strengthen environmental protection. Nowadays, people do not have the awareness of environmental protection, do not pay attention to the protection of the environment at all, and only care about the immediate economic interests of the indiscriminate felling, resulting in a large reduction of vegetation, environmental damage, pollution, this is absolutely not possible.

We must protect the environment, plant more trees, and fundamentally solve the problem of locust plagues caused by the environment.

2. Use natural enemies to control locusts. You can introduce some locust-eating birds or poultry, and let them solve this harmful pest. For example, driving the ducks and chickens raised at home to the farmland and letting them hunt locusts not only solves the hatred in our hearts, but also allows them to eat "delicious food", killing two birds with one stone.

3. Spray pesticides to control locusts. You can choose to spray some drugs specifically to eliminate locusts, such as spraying with 25 ml of Ruijin special suspension agent mixed with 55 kg of water per mu.

Where there are more locusts, you can sprinkle some trichlorfon powder on some small leaves or small wood for control.

In short, there are many ways to control locusts, and you can find one that is suitable for you and easy to implement, and you can eliminate this pest as soon as possible.

Before the locusts hatch and unearth, it is necessary to mix with malathion ** and sprinkle it with fine soil to poison the larvae that have just hatched and hatched, which is easy to kill. Or use malathion to add Ruijin special spray to kill. You can also use poison bait in the evening to trap and kill, and the booby trap effect is better.

It can effectively control the number of adult worms. Attention should also be paid to protecting frogs, some predators of predatory beetles, and Metarhizium aeruginosa can also be used to eliminate adult insects.

Adults are the main harm objects, mainly harm leaf buds, after gnawing there will be mutilation, hollow phenomenon, serious will gnaw leaves, flower buds, only light rod preventive measures first control the number of insects, prevention and control of large-scale occurrence, if not controlled, it is necessary to quickly poison with pesticides, eliminate adult insects.

When it comes to locust plagues, peasant uncles often talk about changes in color, and this kind of locust disaster has brought huge economic losses to peasant uncles. It can completely destroy the growth of crops, and even make crops unharvestable, which is very hateful. So what are the specific methods that can be used to effectively prevent locust plagues?

Xiao Xiao will tell you about it carefully. Want better control of locusts.

3. Prevention and control methods (1) Biological control: protect and use natural enemy insects, and there are more parasitic natural enemies of red wax scales.

1.Harmful symptoms Adults are the main harm objects, mainly harm the leaf buds, after gnawing there will be mutilation, hollow phenomenon, severe will gnaw the leaves, flower buds, only the bare rod. The East Asian locust only eats grasses, which will cause these crops to be eaten.

2.Spread Eggs overwintering underground, about 1 to 3 generations can occur a year, and they are generally affected by factors such as temperature, food, and light.

3.Preventive measures First of all, control the number of insects, prevent and control large-scale occurrence, if not controlled, we must quickly poison with pesticides to eliminate adult insects.

4.Prevention and control methods Before the locusts hatch and are unearthed, they should be sprinkled with malathion ** mixed with fine soil to poison and kill the larvae that have just hatched and hatched, and it is easy to kill.

1) The larval stage, especially the young larval stage, the resistance of the pest is weak, and the drug is easy to kill 2) The larval stage, especially the young larval stage, the amount of food taken by the pests is still relatively small, and the damage caused is not large, so it is timely to prevent and control it, so as not to cause greater losses.

3) The migration ability of the larvae is limited, and it is not easy to move out of the control range, and the control efficiency can be guaranteed (the adult generally has wings, you spray here, it can fly elsewhere to survive).

4) There are exceptions, which are analyzed on a case-by-case basis.

Locusts are the most harmful to crops during the adult stage.

In general, locusts go through four stages of development: egg stage, larval stage, adult stage and egg laying stage. Adults and locusts have the same feeding habits, both are herbivorous, and the adult stage is highly nutritious, accounting for more than 75% of the total food in a lifetime. They bite the leaves and buds of plants with chewing mouthparts into gaps and holes, and in serious cases, they eat up the leaves and buds of large areas of plants, causing major economic losses in agriculture, forestry and animal husbandry.

Some species are oligophagous pests, such as the East Asian locust, which feeds only on grasses and sedges; Some species are polyphagous, such as the Giant Cushion Locust. When the season is dry, they are more gluttonous, and the large amount of food they eat is excreted from the body without being fully digested, so they obtain a large amount of water from it to supply physiological and metabolic needs, thus increasing the degree of harm to crops.

Adult worms, because the organs are mature, have a larger range of activity.

larva, because it was not yet capable of flying at that time.

Locusts are different from other special breeding industries, on the one hand, breeding it can turn harm into treasure and increase farmers' income, and on the other hand, it can increase the number of locusts, forming a potential harm. It is necessary to carry out the necessary safety management measures for its breeding in order to achieve twice the result with half the effort. For large-scale breeding, according to 1 acre of land breeding as the standard, there should be a half-meter-wide plant poison isolation zone around the breeding site, and the surrounding fence should be fenced with barbed wire, and equipped with pesticide sprayers, there are many kinds of pesticides to kill locusts, you can use 75% malathion emulsifiable concentrate, you can also use pyrethroid insecticides such as dipyridine to kill.

If farmers do not want to breed locusts, they have to carry out a final extermination measure. Farmers do not want to breed, should be prepared in advance, in the spring of May 20 each year before the shed can not be removed, after all the locusts are unearthed, before the adults, with pesticides to kill all of them, so that there will be no harm. Before the end of autumn, farmers decided not to breed, must be before September 10, that is, before the locusts did not mate, or kill them with pesticides, not allowed to lay eggs in the breeding shed, such measures can ensure the potential harm in the future, conducive to the healthy development of the locust industry.

Cultivation control. Before cultivating plants, turn the soil 25 to 30 cm deeper, and destroy the eggs by means of exposure to the sun, mechanical damage, and killing by natural enemies, so as to reduce the density of the insect population. Remove weeds around farmland in a timely manner to destroy the living environment of locusts.

Artificial killing. When the insect population density is not large, artificial nets can be organized to kill.

Biocontrol. Use natural enemies to control insect population density. The natural enemies of locusts include birds, frogs, beneficial insects, mites, pathogenic microorganisms, etc. It is necessary to create more environments conducive to the survival of natural enemies and increase the number of natural enemies.

Chemical control. The first is to set up poison bait prevention and control: when there is no wind on a sunny day, mix and mix well with wheat sugar or fresh crushed grass, water, and 40% oxidized dimethoate emulsifiable concentrate, with a dosage of 2 kg per mu, and sprinkle with it.

It should be noted that after the use of medicine, signs must be erected or special personnel must be sent to supervise the conspicuous places in the farmland, and the crops must not be polluted. The second is to spray chemical agents: spray 10,000 times 20% chlorpyramide No. 1 suspension emulsion at the young nymph stage.

In the advanced nymphs and adult stages, 1000 times of 50% phoxanthion EC or 50% pine borer EC are often sprayed for control.

There are two things: locusts develop resistance and pesticide residues.

<> large-scale reclamation of barren land, this method can change the habitat of locusts, the specific method is to turn the soil 25-30 cm deep, through exposure to the sun, mechanical damage and other methods to destroy the eggs; The natural enemies of locusts can also be used to control the density of insect populations, such as birds, frogs, beneficial insects, and mites, but the basic method is to inhibit the hatching of eggs.

1. Measures to control locusts

1. If you want to control locusts well, you need to eliminate the places where they lay eggs, such as a large area of reclaimed barren land, this method can change the environment in which it lives, or you can use artificial nets to kill when the number of locusts is not very large.

2. Cultivation control, before cultivating plants, you can turn the soil 25-30 cm deep, destroy the eggs by exposure, mechanical damage, or use natural enemies to kill and kill them, reduce the density of the insect population, and remove the weeds around the farmland in time to destroy the living environment of locusts.

3. Biological control, the natural enemies of locusts can be used to control the density of insect populations. The natural enemies of locusts include birds, frogs, beneficial insects, mites, pathogenic microorganisms, etc. It is necessary to create more environments conducive to the survival of natural enemies and increase the number of natural enemies.

Second, when is the locust control effect good?

1. Locusts hatch for about two weeks is the best period to exterminate locusts, because the locusts at this time will not fly, and chickens and ducks are more convenient to eat, so it is best to use biological control to control insect pests, which can not only reduce pesticide damage and maintain ecological balance, but also obtain part of the benefits by raising chickens and ducks.

2. Locusts are oviparous insects with very strong reproductive ability, if only one or two, or hundreds or thousands, they do not pose much threat to particularly vast farmland. Therefore, the best time is to prevent their offspring from hatching properly and kill the eggs in the soil, so that the number of locusts can be effectively controlled.

3. If you want to stop the population development of locusts, you can't let them reproduce normally, and when they are disturbed by humans, they will not be able to reproduce smoothly.

Throughout history, the cost of each locust plague has been very heavy. This year, the number of Asian locusts in Africa and even in Eastern Europe has reached 100 billion, and it can be said that there is no grass everywhere they go, resulting in a great reduction in grain production and extremely threatening people's normal life. The locust plague has been paid attention to in all dynasties, because the people take food as their sky, which is related to the most fundamental survival problem.

As long as it is not controlled, there will be a lot of hunger problems.

First, the locust swarm is very large. Due to the high reproduction rate of locusts and the speed of movement, as soon as they appear, they will be like the wind passing through the sky, and if effective measures are not taken, it will trigger a large number of chain reactions. After they are gathered, they have the ability to gnaw without any grass.

They mutate quickly, newborn, solitary, mild, and ashamed. But once there are more than 60 of them, the color changes and the personality changes. He became particularly irritable, aggressive, and had a great appetite, and began to march in groups.

After the encounter, they merge from time to time, and the group will get bigger and bigger.

Second, the harm is huge. Desert locusts and flying locusts are the most important agricultural pests and the most extinction of migratory pests.

Third, in-depth historical experience. It has been recorded in all Chinese dynasties that in the summer of 2002, more than 100 counties in 13 provinces, autonomous regions and municipalities, including Hebei and Xinjiang, were plagued by locust plagues in different ways, and 90 million mu of agricultural and pastoral areas were affected, resulting in great losses. Today, it is mainly locusts that have migrated from abroad.

Fourth, the risk of desert locust swarms invading China remains. Locusts will eat our crops and all green will be swept away, so we need to be prepared for the arrival of locusts and come up with a way to stop the locust plague. In nature, the food chain adheres to a state of relative harmony, and the ecological environment can be guaranteed and optimized.

Species extinction or endangerment affect biological chains and thus ecosystems; And the disaster of certain organisms will definitely destroy the biological chain and ecosystem.

The problem of locusts must be paid attention to, although the current science and technology are thriving, but the environmental problems are intensifying, especially the chain effect caused by climate warming, many viruses that have been silent for hundreds of millions of years are eager to try, many animals and plants have evolved from time to time to adapt to the environment, and have surpassed the original understanding of human beings, locusts are only the tip of the iceberg, and they must be paid attention to.