What are the effects of underground pests on crops? What are the methods of prevention and control?

In the period after the autumn harvestThe prevention and control of underground pests should be based on ploughing and land preparation, and the order of land preparation after the autumn harvest is generally to deal with the weeds in the crop field first, and then carry out the operation of ploughing. According to the law and characteristics of pest activity, it is usually a favorable period for control during the larval period: the larvae are less resistant to drugs, and the internal structure is not mature enough, and the normal drug effect can better kill the larvae.

<> underground pests not only affect root crops, but also most crop seeds, seedlings, main stems near the surface and underground parts. Common underground pests include mole crickets, ground tigers, needleworms, grubs, termites, etc., which are mainly dangerous in dry land. These underground pests are mainly characterized by penetrating into the soil to destroy crops, and generally do not move crops or move less.

Therefore, it is necessary to apply pesticides and root irrigation treatment. The nozzle can be removed with a sprayer at the seedling stage, and the pesticide can be sprayed antegrade or tree by tree. Or combined with watering to apply pesticides throughout the field.

The grub, which we call the peach worm here, is the larva of the beetle. Although there are many kinds, but the grubs that harm crops are distinguished from the color of white, there are two kinds of black, these two kinds of grubs are harmful to all crops, and the seed mixture control can also effectively control underground pests, as long as 35% Fumei double rust spirit and seeds are mixed together, so that grubs, beetles, needleworms, mole crickets and other underground pests can be controlled.

Sprinkle poisonous soil: It can be mixed with the soil with the medicine to make poisonous soil, which can be sprinkled near the crop, which can play a good role in controlling underground pests. You can use 40% Lesburn, 10 kg of fine sand, and you need to configure about 100 ml of medicine.

For the old insects of grubs, beetles have the ability to fake death, and use artificial vibration to kill a large number of adult insects. Because most nocturnal beetles are phototaxis, they can be booby-trapped with a black light. Use the fake death of the beetle to pounce to protect the trees from harm and reduce the occurrence of grubs in the soil.

When the ground tiger spot piece occurs, the use of soil capture has a certain effect. Mole crickets can also be manually captured to reduce the harm.

Underground pests can have a number of effects on crops, such as causing crops to die or grow slowly, ultimately reducing yields. Scientific and reasonable fertilization and water control can effectively prevent pests and diseases, and crops and other different varieties can be planted separately, and special insecticides for plants should be used if diseases occur.

There are three common underground pests, and the control methods are as follows:

1. Needleworm, which generally grows more in rice, will cause plant root rot, bad roots, lack of seedlings and broken walls, farmers will take the method of flooding to kill pests, and can also use chlordane powder and maggot to spread poison;

2. Tigers, will bite the base of corn stalks to cause lack of seedlings, which is the most harmful pest to crops, generally with a trap lamp directly trapped, or with sweet and sour venom to kill adults;

3. Grubs, grubs will eat plants or seedlings directly, and can be directly sprinkled on the ground with sulfur or isosulfonate poison to prevent and control.

In your daily life, do you know what are the effects of underground pests on crops? What are the methods of prevention and control? There are many kinds of underground pests, mainly including mole crickets, grubs, needleworms, ground tigers, root maggots, root bugs, root aphids, pseudo-ground beetles, root leaf beetles, root beetles, root weevils and termites, etc., more than 10 categories, among which mole crickets, grubs, needleworms, ground tigers are the main four categories, with a wide area and serious damage, which are frequent and catastrophic groups.

Mix seeds with 1000 1500 times of phoxanthion emulsifiable concentrate, pile up for 3 4 hours, and sow when the seeds are dry. It is valid for 25-28 days and can control underground pests such as mole crickets, grubs, and needleworms.

Underground pests can cause crops to rot roots, crops to fail to germinate, crops to grow and develop poorly, etc. It can be controlled by mixing pesticides, pesticides and fertilizing seeds.

Beauveria bassiana effect is also good, generally straw returning to the field, you can use it directly, not straw returning to the field, it is best to add the fungus solution to the straw ditch. Under the condition of suitable temperature and humidity, the spores invade the insect body through the insect epidermis after contact with the insect body: 2-kg of 5% phoxanthion granules per mu, or 10% chlorpyrifos granules per mu, evenly sprinkled into the soil; Or per mu with 40% phosphine EC or 40% methyl isosulfonate EC 400-500 ml mixed with 20 kg of fine soil or thiamethoxam clothianidin, these two components belong to neonicotinoid insecticides, with systemic absorption, contact killing, stomach toxicity, thiamethoxam clothianidin is currently very good in the direction of underground pests, grubs, mole crickets, needleworms.

The reason why underground pest control is difficult is mainly because the living environment of this type of pest is underground, which has fatal damage to crops that grow and bear fruit underground, such as sweet potatoes, potatoes, peanuts and other crops. But the adults of these pests and diseases are active on the ground, which is the ideal method of controlling underground pests at present, using pesticides to dress seeds, in order to achieve the purpose of controlling pests, which is also the most consistent with what the subject said is the most consistent with the method that can eliminate most of the soil pests at the same time, and at the same time does not hurt the root system of the crop, and the seeds are sprinkled when mixing and sowing. It is mainly a granular insecticide, and the insecticide and seeds can also be mixed together for sowing to achieve the purpose of prevention and killing.

There are also many pesticides in this category.

Now due to the extensive management, planting excessive use of a single chemical fertilizer caused by soil compaction, aggravated pests and diseases, so at the same time of seed dressing, for the plot with serious pests and diseases, a two-pronged approach can be used, sprinkled before sowing, chlorpyrifos and phosphine particles can be sprinkled, but because of the wide application of pre-thiamethoxam and imidacloprid, some pests have developed resistance, so it is recommended to use compound fertilizers, which have a more significant effect on insect control, such as thiamethoxam fertilizer granules.

We should choose methyl isothion pesticides, which can effectively eliminate pests and diseases, and will not affect crops.

The most labor-saving, time-saving and most effective way to control underground pests is to prevent them in advance, and the most obvious effect is to adopt soil treatment or seed dressing, or a combination of the two.

You can use some pesticides with strong efficacy, at this time you can spray them over and over again, and these pesticides can also play a role in supplementing nutrients to the soil, which will not harm crops, and can also make crops grow faster.

Drugs used to control insect pests include pyridyl ether and ketone acetate. As for this drug, it can only be used twice a year at a time of 30 days apart, so as not to reduce the effectiveness of the drug.

It can strengthen the protection of crops, and can also better protect the soil, which can prevent the soil from being damaged by pesticides. It is also more effective for pest control and will not damage the soil. Insecticides can be used, disinfectants can be used, and herbicides can also be used.

Metarhizium aeruginosa is mainly based on contact killing, effective for a variety of pests underground, above ground, and do not have to worry about drug damage due to excessive medication, during the growth of crops, it can be used at any time, after the pests are killed by Metarhizium aeruginosis, the conidia produced on the carcass of the pest, can be spread in the field with the help of wind, water, etc., we commonly see the Scarab Rhizium dosage form generally, 200 million spores gram Metarhizium granules, 8 billion spores per milliliter can disperse oil suspension, 8 billion spore per gram of Metarhizium aeruginosa wettable powder, 10 billion grams of spore grams of oil suspension, 10 billion grams of metarhizium aeruginosa wettable powder and other dosage forms. Nicotinic insecticide thiamethoxam, thiamethoxam can be used for seed dressing, thiamethoxam has the effect of killing a variety of pests, can be used for underground pests, above-ground pests, have control effects, in thiamethoxam has systemic conduction, as well as permeability, but the fast-acting is not so strong, can be combined with high-efficiency cypermethrin, avermectin, improve the speed of eliminating pests, thiamethoxam has a relatively good mixing, therefore, the method used has diversity, can be mixed with a variety of insecticides, fungicides, mixed and used, for soil treatment, seed dressing, Root irrigation.

Imidacloprid, biological insecticides, Beauveria aeruginosa, nicotinic insecticides, 20% chlorofluoro-clothianidin microcapsule suspension, etc., all of which are more effective in controlling pests.

The pesticides used to plant sweet potatoes to control underground pests include matrine aqueous agent, lesben, chlorantraniliprole, etc. The swelling period of sweet potatoes is the period when more water is needed, and the roots of sweet potatoes can be irrigated with matrine 1000 times when watering. Crop rotation can also be used to prevent underground pests and reduce the number of pests.

When preventing pests, it is important to note that farmyard manure must be fully decomposed before application, as the smell of uncooked farmyard manure will attract underground pests.

1. Sweet potato pesticide control underground pests

1. The pesticides used to control underground pests include matrine aqueous agent, Lesben, chlorantraniliprole and other agents. When the sweet potato is swelling, this stage needs a lot of water, and it can be combined with watering to apply 1000 times of matrine water agent to the root of the sweet potato, and the control effect is better. During the normal growth period of sweet potatoes, foliar sprays of Xerox 1000 times can be carried out, or 35% chlorantraniliprole suspension, and each package of agent can be mixed with 15 kg of water when used.

2. You can also use the method of crop rotation to prevent underground pests, and the number of pests can be reduced through crop rotation, and then the pesticide can be used for control, which can improve the efficacy. Sweet potatoes are more drought-tolerant, underground pests are mainly produced according to the growth characteristics of sweet potatoes, they are resistant to dry soil but not waterlogging, and the fields with frequent underground pests can be rotated with water and drought during the prevention and control, which effectively reduces the occurrence of underground pests.

3. When using farmhouse fertilizer for sweet potatoes, it must be fully decomposed before application, because farmhouse fertilizer without rotting will emit the smell that underground pests like, which is conducive to the reproduction of pests. If you use uncooked farm manure for a long time, there will be more and more underground pests, and even if pesticides are used for control, after the effect of the pests disappears, the pests will reappear and continue to harm.

Second, what are the main underground pests of sweet potatoes?

1. Grubs: Grubs are the larvae of beetles, which mainly feed on the underground parts of the young roots and stems of crops, and they will bite or bite off the roots of crops to make the seedlings wither and die.

2. Needleworm: Needleworm larvae will harm seeds and germs, and in severe cases, there will be many small holes in the rhizomes of seedlings, resulting in dead seedlings, lack of seedlings or tuber rot.

3. Mole crickets: Mole crickets will harm the seeds that have just been sown or germinated and feed on the tender stems, bite the young stems into a mess, and at the same time, the roots of the seedlings will be separated from the soil, causing the seedlings to wither and die.

4. Ground tiger: larvae have a mixed feeding habits, they will lurk in the soil during the day, and they will come out at night, which will lead to serious lack of seedlings and even destruction of crops.

5. Termites: Termites are very harmful to sweet potatoes, and they can directly hollow out sweet potatoes, which will lead to a decrease in sweet potato quality and yield in serious cases.

6. Root aphid: Mainly concentrated in the taproot, sucking the root juice, causing the lower part of the taproot and fibrous roots to become thinner, atrophy, blacken and even rot.

Underground Pest Fire Species:

1.Grub: 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 wilt and die, soybeans, sugar beet, sorghum are more seriously damaged.

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

3.Mole crickets: underground bites, just sowing seeds or germinating seeds, and feeding tender stems and roots, damage characteristics, biting into a messy shape, at the same time, mole crickets surface activities form tunnels, so that the seedling roots and soil are separated, resulting in the withering and death of seedlings, and millet is seriously damaged.

4.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.

Methods of control of underground pests:

First, the prevention and control methods of grubs:

1 Use 40 dimethoate to oxidize 500 times.

2 5 The enemy kills 1800 times the liquid to kill the adult insects.

3 Mix well with 50 chlordane powder and appropriate fine soil, turn it under the soil, and poison the larvae.

4. In the larval peak stage, it is poured in the soil with 50 phosphine 600 times, which has a good effect on the larvae.

Second, the prevention and control methods of needle worm:

1 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.

2. Treat the soil with chlordane powder, a method for controlling mole crickets.

3. Prevention and control methods of mole crickets:

1. Light traps and kills adult insects, and there are many traps in sunny and windless and hot weather.

2 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.

3 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.

Fourth, the prevention and control methods of ground tigers:

1 Booby trapping adult insects. 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.

2 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.

3 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.