What are the underground pests of peanuts? What are the effective preventive measures?

The main underground pest that harms peanuts is grubs, in addition to ground tigers, needlebugs and other underground pests. When preparing the land, mix it with fine soil or fertilize it evenly. There are phosphine capsules on the market.

At present, 10% embankment, 15% shastan, and high soil fertility are commonly used. Before 2011, many flower production areas were controlled by this method, probably because of manual or uneven spreading, cost, control effect and other reasons.

The underground pests that harm peanuts mainly include grubs, ground tigers, mole crickets, needleworms, etc.

There are several ways to prevent it:

Chlorpyrifos particles are incorporated into the land when it is cultivated, which can effectively prevent pests.

Seed coating. Common coatings on the market include ticks and chlorpyrifos, which can effectively control aphids.

Pesticide application. It is very convenient and a common means in the market.

There are many underground pests of peanuts, such as grubs, root-knot nematodes, mole crickets, etc., which feed on peanut roots, stems, leaves, and fruits. When soil treatment is carried out, before peanut sowing, 3 kg of 80% dibromopropane emulsion mixed with 75 100 kg of water can be applied in ditching strips, or 3% carbofuran granules can be applied at the same time as sowing, about 3 kg per mu, or 10% Yishubao granules and 3% milel granules, about 5 kg of ditching strips per mu, or 10% defense line No. 1 emulsifiable concentrate, about 3 kg per mu and 25 kg of fine soil to make poisonous soil and sprinkle it into the hole, and sow it after covering the soil.

For peanut underground insects such as ground tigers, mole crickets, needleworms, etc., underground pest treatment agents can be used for effective prevention, such as phosphine high chlorine mixed thiamethoxam, which can effectively reduce drug residues and kill insects.

Control methods of peanut underground pests:

Underground pests are an important factor that plagues peanuts to continue to produce high yields, the main underground pests that harm peanut high yield are grubs, in addition to golden tortoise shells, ground tigers, ground maggots, needleworms and other underground pests, today farming to help you introduce several effective control methods.

1.Proper crop rotation. The selection of good stubble is the basis for high yield of peanut, and it is more suitable to take grasses such as corn and millet, and it is necessary to avoid heavy stubble as much as possible.

2.Seed coating. Before sowing, the seeds are treated with seed coating agent or seed dressing agent, which can not only prevent but also prevent mice. It can be sown with coated seeds, or with 50% phosphine emulsifiable concentrate 500 ml with 10 to 50 kg of water and 400 to 500 kg of seed dressing.

3.Agronomic measures for prevention. For example, the application of well-rotted organic fertilizer, the addition of calcium and magnesium fertilizer, promote the healthy growth of peanuts, improve the ability to resist insects; The leaves of castor beans contain ricin, and castor beans or sedium can poison and kill the adult insects that feed and reduce the number of adults in the field; Treated in large areas for autumn or spring ploughing; Where conditions permit, winter irrigation can be carried out in lJanuary to reduce the harm of grubs.

4.Biocontrol. Taking advantage of the fact that the golden tortoise shell is active from 20 to 22 o'clock at night and has phototaxis, an insecticidal lamp is used to trap and kill adult insects from 20 to 22 o'clock every night.

The golden tortoise shell was destroyed before laying eggs after excavation, so as to reduce the number of eggs laid in the field; Pesticide trapping, in the peak period of adult occurrence, the fresh elm branch with 40% oxidized dimethoate or 90% crystal trichlorfon soaked for 10 hours, tie the handle into the peanut field, 4 to 5 per mu, trap the adult, put the tree in the shade in the morning, take it out in the evening and then use, a handful of medicinal branches can be used continuously for 2 to 3 days.

5.Pharmaceutical prevention and control.

1) Soil treatment. In the peak hatching stage of grubs and the young larval stage, the soil was treated with toxincide ticks, phosphine, etc., and the roots were irrigated by ditching or spraying. When the insect situation is serious, combined with the cultivated land before sowing, use parathion or 5% carbaryl powder to kilograms per mu, add 15 to 25 kg of fine soil, mix evenly and spread the whole field, and then turn the rake into the soil.

2) Apply at the time of sowing. It can be mixed with phosphine emulsion according to the ratio of 1:50 or 50% phosphine according to the ratio of 1:

50 to 75 seed dressing, to protect seeds and seedlings, this method is carried out in summer, the temperature is high, and the stuffing time should not be too long, so as to prevent the seeds from heating and affecting germination; Or use 2% Maisha granules (the main ingredient is 2% avermectin), apply according to the points when sowing, which can not only effectively prevent the harm of grubs to peanuts, but also have a good control effect on underground pests such as ground tigers, ground maggots, needleworms and golden tortoise shells.

3) Application at seedling stage. The method of irrigating roots before flowering and sprinkling poisonous soil with imidacol phosphos emulsifiable concentrate before flowering or sowing has a remarkable effect. The root irrigation solution can directly act on the grub larvae, play a contact killing or stomach poisoning effect, and the effective period is 40 to 50 days.

The villagers in the peanut planting area are more keen on dealing with the problem of underground pests for peanut seed dressing, for example, acetamiprid, fipronil, thiamethoxam, fipronil, etc., not only to control underground pests, but also to reasonably prevent and control the stinging and sucking insect pests in the growth period. At the same time of seed dressing, pesticides and fungicides can also be added to the insecticides, such as thiofuramide, difenoconazole seed coating, fludioxonil floating seed coating, methamethyl floating seed coating, which can reasonably control peanut root diseases and pests such as brown spot, bacterial wilt, white silk disease, etc.

Commonly used in the control of grubs refers to poisoning cicadas, the drug can immediately eliminate grubs and other peanut underground pests. And it has the advantages of long-term medicinal power, no systemic property, and not easy to lead to food crop residues. How to use chlorpyrifos:

1 mu should be 3% chlorpyrifos, 2 4kg of tablets, before sowing or transplanting, furrowing, burrowing or topdressing. In addition to chlorpyrifos, imidac-octathion can also be used to irrigate the roots before the peanut blooms or sprinkle the poisonous soil before sowing, and the actual effect is excellent.

Seed treatment. When sowing, carry out pesticide seed dressing. Or use 50% octathion acetamiprid, according to the amount of 200 250 grams per mu, mix in fine sand, mix evenly, and apply it in the sowing hole.

Improve planting management methods and effectively apply fertilizer. To use organic fertilizer that is completely manure, do not apply pig manure. Deep ploughing, scientific and reasonable fertilization and watering, organic fertilizer should be effectively prepared with nitrogen, phosphorus and potassium fertilizer, properly manipulate the base fertilizer, increase phosphorus and potassium fertilizer, promote the healthy growth and development of peanuts, and improve the ability of peanuts to resist diseases.

For the small areas where the disease of peanut Donghai Forest is more serious, farmers will continue to choose special care methods to carry out underground pest control, such as using imidaco-phosphoacetamiprid with water for irrigation or mixing soil and bran to carry out poisoning; The nymphs of underground pests are sprayed and hunted in the form of light effect spraying, such as mole crickets, beetles and other insect pests; Naturally, you can also choose the method of pit spraying, for example, mole crickets like fresh horse manure, and can dig large pits to spray intensively.

Dressing peanuts before sowing is the easiest way to control pests and diseases. After planting, you can sprinkle some lime powder in the peanut field, which can kill bacteria and insects

Spray pesticides, because pesticides can kill pests in the soil very well, so pesticides should be sprayed to control.

It is necessary to choose the right land for planting, we must pay attention to the treatment of the soil, it needs to be dried, the right varieties are selected for planting, and pesticides are sprayed on time.

Peanut aphid: Inhibits the flowering and fruiting of peanuts. Thrips:

The surface of the peanut leaf will appear white or yellow dots. Spider mites: Hinder the normal growth of peanuts and cause reduced yields.

Grubs: Grubs eat leaves when they are young in peanuts. Mole crickets:

This causes the soil to detach from the peanut roots, which in turn leads to death.

1. Peanut aphid

Peanuts may be attacked by peanut aphids during the whole growth and development period, when the disease is mild, it will inhibit the flowering and fruiting of peanuts, and when the disease is severe, the plant will become dwarf, and the leaves will shrink, in order to prevent and control this disease, you can spray imidacloprid, cypermethrin and other agents.

2. Thrips

Thrips is a kind of peanut underground pest, will absorb nutrients on the young leaves, so that the surface of the leaves appear white or yellow dots, when the plant withers and falls off, the flowers do not bear fruit, can be sprayed acetamiprid, spiromethane ethyl ester and other agents to prevent and control.

3. Red spider

Peanuts are attacked by red spiders, the leaves will initially be grayish-white, then gradually yellow, and finally dry up and fall off, if the number of adults and nymphs is large, it will hinder the normal growth of the plant, resulting in the consequences of reduced yield, once this insect pest is found, it is necessary to spray avermectin agent.

4. Grubs

Grub is the most serious pest of peanuts, and the damage time is very long, from the seedling stage to the maturity period will be infested, in the seedling period grub will eat the rhizome, the mature period grub will eat the young fruit, so that the peanut yield is greatly reduced.

5. Mole crickets

Mole crickets mainly eat the underground shoots of peanuts, and the leaves will fall, and the mole crickets often move underground, which will also cause the soil to be separated from the roots of the plant, and then make the plant die, the insect pest is more serious in North China.

The main underground pests are grubs, in addition to many underground pests such as golden tortoise shells, ground tigers, ground maggots, and needleworms. Apply enough well-rotted organic fertilizer, increase calcium and magnesium fertilizer, promote the healthy growth of peanuts, and improve insect resistance; The castor beans are planted on the edge of the field, and the castor leaves contain ricin, which can poison and kill the adult insects that feed and reduce the number of adults in the field; Treated in large areas for autumn or spring ploughing; Where conditions permit, winter irrigation can be carried out in lJanuary to reduce the harm of grubs.

The main underground pests that harm peanuts include: ground tigers, grubs, needleworms, mole crickets, etc., these underground pests will produce harm in the entire growth period of peanuts, among which the seedling stage is the peak period of the prevention and control of overwintering adults and larvae, and this period will also be the key period for the prevention and control of ground tigers. The peanut needle period is the peak period of grub and other pests, and this period is also a critical period for the prevention and control of grubs, which needs to be controlled by chemical or physical means in time as needed.

In addition, the pod maturity period of peanut to the harvest period is the peak period of the adult damage of various underground pests, this period should be combined with chemical means and physical means and other ways to prevent and control, combined with the harvest period to clear the tree in the field, etc., to prevent the damage of underground pests to the next crop. The control of peanut underground pests needs to be combined with the occurrence law of each period, and the prevention and control of sowing period and growth and development period should be combined, and the control of adult insects should be combined with larval control.

There are many kinds of underground pests that harm peanuts, mainly crickets, mole crickets, ground tigers, grubs, and needleworms, which are all omnivorous and can harm many crops at the same time.

The main prevention and control methods are: agricultural control: intensive farming, weed elimination, irrigation, crop rotation; Physical and artificial control:

Artificial trapping, light trapping, sugar liquid trapping, grass trapping; Biological control: Bacillus lactis is cultivated and inoculated in the soil to make the grub susceptible to death; Chemical control: It can be combined with the prevention and control of sweet potato stem nematode disease to soak seedlings with pesticides, mix poisonous soil, trap poison bait, and spray pesticides.

In particular, it is recommended to take agricultural measures to prevent underground pests, and chemical control must meet the national requirements for the safe production of agricultural products.

Grubs, also known as white soil silkworms, ground silkworms, etc., are the most serious pests in the peanut growth period. July and August is the most serious period for peanut grub larvae, mainly because the larvae hide in the soil to damage the peanut pods and roots, and the pod stage is damaged.

Prevention and control methods: 1) Deep ploughing of the soil, deep ploughing of the soil before the year, combined with overwintering water, effectively kill overwintering insect eggs.

2) Artificial trapping, evening is the mating period, and the adult phototaxis is used to trap, which can effectively reduce the base of the insect population.

3) Reasonable crop rotation, and corn, sorghum and other gramineous crops rotation.

4) The hatching of eggs in July and August, timely watering and drought resistance can reduce the survival rate of eggs.

The underground insect pests of peanuts mainly include this Lou Gu Lou Gu, it is easy to eat peanuts, so you can use some underground to buy some medicine. to kill.

<> control of peanut underground pests can be used 70% imidacloprid suspension seed dressing, or 5% emamectin benzosalt microemulsion chlorpyrifos spray irrigation roots, or 500 ml of 40% phoxanthion emulsifiable concentrate per mu, and sprayed with water for socks.