What are the pests in the ground? What are underground pests and what are their harmful characterist

Underground pests fire species: grubs: Scarab larvae feed on crops, young roots, stems, underground parts often bite or bite off the root hazard characteristics, the fracture is relatively neat, so that the seedlings wither and die, soybeans, sugar beet, sorghum are more seriously damaged.

Needleworm: The larvae of the knocking insect damage wheat, corn, sorghum, potato, etc. bite seeds, germs, rhizomes, etc. Mole crickets:

Underground biting just sowed seeds or germinated seeds and feeding tender stems and roots, damage characteristics, biting into a messy shape, at the same time, mole crickets surface layer activity to form a tunnel, so that the seedling roots and soil are separated, resulting in the withering and death of seedlings, and millet is seriously damaged. Ground tiger: larvae eat miscellaneous damage to soybeans, corn, vegetables and other crops, latent soil during the day, unearthed at night, damage characteristics, stem base bite, often cause serious crop lack of seedlings, broken strips and even destroyed seeds.

Followed by root maggots, root bugs, root aphids, pseudo-tertepals, crickets, root scales, root leaf beetles, root beetles, root weevils and termites. Underground pest control method: use 40 dimethoate 500 times solution.

5. The enemy kills 1800 times the liquid to kill the adult insects. Mix well with 50 chlordanan powder and appropriate fine soil, turn it under the soil, and poison the larvae. In the larval peak stage, it is poured in the soil with 50 phosphine 600 times, which has a good effect on the larvae.

The eggs and hatchling larvae of needleworm are distributed on the surface of the soil and are less resistant to adverse environments. Ploughing and exposing the soil, cultivating and weeding, can make it die. Mole crickets: The soil is treated with chlordane powder, a method used to control mole crickets.

Lights trap and kill adults, and there are many traps in sunny and windless and hot weather. Mix well with 50 chlordane powder and an appropriate amount of fine soil, and then turn it into the ground. About 2500 grams of medicine per mu.

Mole crickets have strong chemotaxis and are especially fond of sweet items. Therefore, use 500 grams of fried bean cake or millet, add 500 grams of water and 50 grams of 40 dimethoate emulsion to make poisonous bait to lure mole crickets. Prevention and control methods of ground tigers:

Booby-trap adults. According to the phototaxis of the adults, they are lit to trap and kill at the peak of adult emergence, or the adults are poisoned with sweet and sour venom. Planting trap crops.

In spring, a small amount of amaranth seeds are sown in the nursery to attract pests to the amaranth to reduce the damage to flowers and trees. Artificial killing. Larvae can be found early in the morning by stirring 3 to 6 cm of topsoil around broken seedlings or along infested branches and leaves remaining at the hole opening.

500 grams of 6 trichlorfon powder per mu, 25,000 grams of soil are mixed well, and sprinkled in the nursery, and the effect is good.

Pest species vary from place to place, but are generally common in dryland areas, especially mole crickets, grubs, needleworms, ground tigers and root maggots. After the damage of crops and other crops, the light ones wilt, the growth is stunted, and the heavy ones dry up and die, resulting in the lack of seedlings and broken ridges, resulting in reduced yields. Some species are harmful to larvae, while others can be harmful to adults and larvae (nymphs).

The damage methods can be divided into three categories: the underground part of the plant that is harmed by long-term living in the soil; day and night, it is harmful near the soil surface; It can be harmful both above and below ground. The body shape of underground pests is mostly elongated and spindle-shaped, the body pigment is degenerated, and some organs are developed or degenerated, such as the front feet of mole crickets are specialized into digging feet, which are suitable for digging in the soil.

Some species have elytra or eye degeneration. The regularity of vertical activity in the soil shows obvious seasonality, which is mainly due to the sensitive response of underground pests to soil temperature and soil moisture. In winter and summer, the topsoil layer moves to the deep layer when the temperature and humidity conditions are not suitable, and in spring and autumn, it moves from the deep layer to the topsoil layer, and this time is generally at the seedling stage of crops, so as to provide them with sufficient food conditions.

Underground pests are omnivorous insects that live in the soil during their lifetime or at some stage of their lives and harm the underground parts of plants, seeds, seedlings, or the main stems near the surface of the soil. There are many species, mainly mole crickets, grubs, needleworms, ground tigers, root maggots, root bugs, root aphids, pseudo-ground beetles, crickets, root scales, root leaf beetles, root beetles, root weevils and termites, etc., more than 10 categories, a total of about 200 species, belonging to 8 orders and 36 families. It is found all over China.

According to statistics, there are 320 species of underground pests in China, including grubs, needleworms, ground tigers, mole crickets, root maggots, pseudo-step beetles, oil hyacinths, root weevils, root bugs, etc., among which grubs, needleworms, ground tigers, and mole crickets are more serious.

What are underground pests and what are their harmful characteristics?

Hello dear, I am honored to receive your question to keep you waiting, dear, underground pests mainly refer to insects that live in the soil and feed on the roots and stems of plants, including ground tigers (empty sources of insects), grubs (mole crickets), mole crickets (Lala crickets), needleworms (blind yellow worms, wire worms, golden rake teeth) and so on. Underground pests are omnivorous, and spring is the most harmful in the spring. The hazard characteristics are as follows: The hazard characteristics of various underground pests are different.

Ground tigers feed on the base of young stems close to the ground, biting or biting seedlings. Grubs can directly bite off the roots and stems of seedlings, causing seedlings to die. After the seedlings are harmed, the soil around the seedlings is loose but not uplifted, and the roots of the seedlings are bitten off or the root bark is bitten off, causing the seedlings to wilt and die, but rarely lodging.

Mole crickets bite on freshly sown seeds, especially freshly sprouted seeds. After mole crickets damage seedlings, near the roots, the soil is often raised, and the seedlings wither and lodging. When the damaged seedlings are dug up, it can be seen that the base of the roots or stems of the seedlings has been bitten off, and the wounds are neat.

After the needleworm damages the seedlings, there are wormholes drilled at the base of the seedling taproot or young stem, and the seedlings gradually wither or grow poorly. Thank you for your trust, the above is my reply, I hope it can help you, I wish you a happy life and smooth work, give a thumbs up if it is convenient, thank you.

Abstract Underground pests mainly harm the underground rhizomes and seedlings of plants with larvae, mainly harm the roots of seedlings, cause seedlings to die, and lead to lack of seedlings and broken ridges. The growth period is harmed, the larvae mainly harm the underground roots, tubers, bulbs and other parts, after the roots and tubers are damaged, a large number of holes often appear, lose the edible value and commodity value, resulting in a serious reduction in yield, the adults mainly harm the leaves of the aboveground, after the leaves are damaged, there are a large number of missing or even only leaf veins, resulting in reduced photosynthesis and weak plant growth.

The extent of the damage caused by underground pests.

Underground pests mainly harm the underground rhizomes and seedlings of plants with larvae, and mainly harm the roots of seedlings, causing seedlings to die, resulting in lack of seedlings and broken ridges; The growth period is harmed, the larvae mainly harm the underground roots, tubers, bulbs and other parts, after the roots and tubers are damaged, a large number of holes often appear, lose the edible value and commodity value, resulting in a serious reduction in yield, the adults mainly harm the leaves of the aboveground, after the leaves are damaged, there are a large number of missing or even only leaf veins, resulting in reduced photosynthesis and weak plant growth.

1) Soil treatment, before sowing and transplanting crops such as wheat, corn, potatoes, etc., can be used with 2% thiamethoxam granules, or 4% imidacloprid granules, or 5% diaziphos granules and other agents, with 15 kg of fine soil, or with 1 billion grams of Beauveria aeruginosa mixed with fine soil, mixed well and carried out hole application, furrow application and strip application, can effectively control the harm of underground pests, long duration of effect, outstanding effect. (2) Seed dressing. Before sowing tomatoes, eggplants, peppers, cucumbers, watermelons and other crops, 60% imidacloprid can be used to suspend seed dressing, or 10 billion grams of Beauveria aeruginosa 500 times liquid seed dressing, and sowing after drying in a cool place, which can control the harm of various underground pests for a long time.

Organophosphorus pesticides such as octathion and chlorpyrifos are commonly used to eliminate underground pests; clothianidin, dinotefuran and other nicotinic pesticides; Avi thiazolphosphine and other control agents for root-knot nematodes.

1. Organophosphorus pesticides such as phosphine and chlorpyrifos.

There are mainly phosphine, chlorpyrifos, phosphos, etc., these agents are now strictly controlled, chlorpyrifos has been banned in some provinces, phos is prohibited in vegetables such as cabbage, fruit trees, tea and medicinal materials, and spray use is prohibited. Organophosphorus pesticides have a good effect on underground pests and are more toxic, and may be completely banned in the future.

2. Clothianidin, dinotefuran and other nicotinic pesticides.

At present, there are more imidacloprid, thiamethoxam, clothianidin, dinotefuran, etc., these pesticides have low toxicity, broad spectrum effect, strong conductivity, but the cost of use is high, and they can generally be used in the form of seed dressing or granules. At present, it is a mainstream drug, and the formula includes biphenyl clothianidin, bifen dinotefuran, etc.

3. Avi thiazolphosphine and other agents for the prevention and control of root-knot nematodes.

It is mainly used to control root-knot nematodes, and is used more in fruit trees and vegetable areas, and avermectin and thiazolphosphine are used to control root-knot nematodes.

Introduction to underground pests

Common underground pests include mole crickets, grubs, needleworms, ground tigers, root maggots, root bugs, root aphids, pseudo-ground beetles, crickets, root scales, root leaf beetles, root beetles, root weevils and termites and other more than 10 types, which are distributed all over China, especially mole crickets, grubs, needleworms, ground tigers and root maggots are the most important.

The body shape of underground pests is mostly elongated and spindle-shaped, the body pigment is degenerated, and some organs are developed or degenerated, such as the front feet of mole crickets are specialized to dig feet, which are suitable for digging in the soil, and the temperature and humidity conditions of the topsoil layer in winter and summer are not suitable to move to the deep layer, and in spring and autumn, they move from the deep layer to the topsoil layer.

The special drugs for underground pests include imidacloprid, phosphine granules, phosphine emulsifiable concentrate, 3911, phosphine, trichlorfon, etc.

The drug can be diluted and sprayed on the soil surface, or before planting. Spray it diluted on the seeds. Underground pests are omnivorous insects that live in the soil during their lifetime or at some point in their lives and can harm the underground parts of plants, seeds, seedlings, or the main stems of the surface of the soil.

There are more than 10 types of common underground pests, such as mole crickets, grubs, needleworms, ground tigers, root maggots, root bugs, root aphids, pseudo-ground beetles, crickets, root scales, root leaf beetles, root beetles, root weevils and termites. It is distributed all over China, especially mole crickets, grubs, needleworms, ground tigers and root maggots are the most important.

Mole cricket killing

Use fried wheat bran and bean cake to trap mole crickets. Generally, in the evening when there is no rain, dig a pit in the field, apply poisonous bait, and clean up the trapped pests in the early morning of the next day. Place the sweet and sour wine mixture basin, the production of sweet and sour wine mixture:

Take kilograms of sugar, 1 kilogram of vinegar, kilograms of liquor, kilograms of water, and add 15-25 grams of crystal trichlorfon, which can trap and kill the adults of tigers.

Rub the rapeseed cake of trichlorfon, dig and slowly put it in the pot and fry until fragrant, put the fried rapeseed cake in the bucket, and then pour the trichlorfon cake melted with warm water into the bucket and simmer for 3-5 minutes. In the evening, the poison bait was divided into small portions and scattered in the field of transplanted cotton, and the poisoned tiger body could be seen early the next morning. Cypermethrin can not only poison pests on the ground, such as heartworms and green worms, but also can be used to remove insects underground, which can be said to be the main drug for agricultural spraying and pesticide.

Underground pests are best used with maggots.

48% maggotin EC can control underground pests in a variety of crops such as leeks, tomatoes, cucumbers, soybeans, cotton and corn.

How to use: 1. Control of underground pests such as leeks, tomatoes, cucumbers, soybeans, cotton and corn: 500 grams per 667 square meters of water 75 kg 100 kg irrigated with water.

2. Prevention and control of underground insect pests of vegetables: 300 grams per 667 square meters of water volume and 300 kg of water are sprayed along the ridge, and the effect is excellent.

3. Seed dressing: maggots and peanuts, cotton, soybeans, corn, wheat and vegetables, garlic crops can effectively control underground insect pests, usually 3 grams per kilogram of seeds and 5 grams of maggotin can be.

Underground pest species and hazards:

1. The grub is the larvae of the beetle, feeding on the young roots, stems and underground parts of the crop, and often wants to bite or bite off, and the hazard is characterized by the fact that the fracture is relatively neat, so that the seedlings wither and die.

2. Needleworm is the larvae of the knocking insect, which bites seeds, germs, rhizomes, and the harmful feature is that the young rhizomes are eaten into small holes, resulting in dead seedlings, lack of seedlings or causing tuber rot.

3. Mole crickets bite the seeds that have just been sown or germinated seeds in the ground, and eat tender stems and roots, the hazard is characterized by biting into a messy shape, and at the same time, the mole crickets are active on the surface layer to form a tunnel, so that the seedling roots are separated from the soil, causing the seedlings to wither and die.

4. Tiger larvae have a very mixed diet, lurking in the soil during the day, and unearthing hazards at night, and the hazard is characterized by biting off the base of the stem, which often causes serious lack of seedlings and broken strips of crops, and even destroys seeds.

Summary. 1. Imidacloprid.

1. Imidacloprid is a nicotinic ultra-efficient insecticide, which has the characteristics of broad-spectrum, high efficiency, low toxicity and low residue, and at the same time, pests are not easy to produce resistance, and have a variety of effects such as contact killing, stomach toxicity and systemic absorption.

2. After the pest is exposed to the agent, it will cause its central nervous system conduction to be blocked, so that it will be paralyzed and die, and it will have a good control effect 1 day after application, and the residual period will be as long as 25 days.

3. Its efficacy is related to temperature, the higher the temperature, the better its insecticidal effect, mainly used for the prevention and control of stinging and sucking mouthparts pests.

2. Trichlorfon.

1. Trichlorfon is an organophosphorus insecticide, which belongs to the type of organophosphorus pesticide phosphate.

2. The industrial products are white solids, the melting point of pure products is 83-84, soluble in water and organic solvents, and the properties are relatively stable, but they will be hydrolyzed into dichlorvos when alkaline, and their toxicity is mainly acute poisoning.

3. Trichlorfon is a high-efficiency, low-toxicity and low-residue insecticide, which has the effect of contact killing and stomach toxicity, and can be directly prepared with aqueous solution or made into poisonous bait for the prevention and control of agricultural, forestry, horticultural pests and underground pests of chewing mouthparts and stinging and sucking mouthparts.

What can be done to cure underground pests.

1. Imidacloprid 1, imidacloprid is a nicotinic ultra-efficient insecticide, which has the characteristics of broad spectrum, high efficiency, low toxicity and low residue, and at the same time, pests are not easy to produce resistance, and have a variety of effects such as contact killing, stomach toxicity and systemic absorption. 2. After the pest is exposed to the agent, it will cause its central nervous system conduction to be blocked, so that it will be paralyzed and die, and it will have a good control effect 1 day after application, and the residual period will be as long as 25 days. 3. Its efficacy is related to temperature, the higher the temperature, the better its insecticidal effect, mainly used for the prevention and control of stinging and sucking mouthparts pests.

2. Trichlorfon 1, trichlorfon is an organophosphorus insecticide, which belongs to the organophosphorus pesticide phosphate type. 2. The industrial products are white solids, the melting point of pure products is 83-84, soluble in water and organic solvents, and the properties are relatively stable, but they will be hydrolyzed into dichlorvos when alkaline, and their toxicity is mainly acute poisoning. 3. Trichlorfon is a high-efficiency, low-toxicity and low-residue insecticide, which has the effect of contact killing and stomach toxicity, and can be directly prepared with aqueous solution or made into poisonous bait for the prevention and control of agricultural, forestry, horticultural pests and underground pests of chewing mouthparts and stinging and sucking mouthparts.

The above two drugs are very effective.