What are the effects of the use of drugs to control underground pests on the vegetables produced?

In the process of planting vegetables, it is inevitable to suffer from the impact of some pests and diseases, and the use of pesticides can not be avoided

1. Try to use low-toxicity pesticide products.

The drugs for the prevention and control of underground pests, some are highly toxic, some are moderately toxic, and some are low toxicity, and some high-efficiency and low-toxicity pollution-free products will not be affected by normal use, such as phosphine granules, avermectin granules, etc. However, those highly toxic and high-residue products such as carbofuran, phosphine, chlorpyrifos granules and other organophosphorus products will cause excessive pesticide residues in vegetables, and the use of such products is basically prohibited or restricted on vegetables. Either way, it can have a residual effect in vegetable production.

2. Spray in strict accordance with the dosage specified in the pesticide label.

In order to avoid excessive pesticide residues, spraying should be carried out in strict accordance with the dosage specified in the pesticide label, and in the process of using pesticides, it is necessary to rotate alternately, mix and mix reasonably, and avoid long-term use of the same pesticide product, and the prevention and control effect is not good. It is also possible to implement reasonable rotation and stubble of vegetables. At the same time, it is important to avoid harvesting crops at safe intervals, preferably as long as possible from the last spray.

3. Prevention and control of chemical agents.

Nicotinoid insecticides are definitely used to control underground pests. Because this kind of agent not only has low toxicity, but also has good systemic properties, it can be used on crops such as vegetables. In recent years, the application has been more and more recognized by farmers.

For example, our commonly used thiamethoxam, clothianidin, imidacloprid and so on are widely used nicotinic insecticides!

4. Prevent vegetable diseases and pests.

When using farmhouse fertilizer, it should be fully fermented to kill the eggs of pests and diseases and reduce the occurrence of insect pestsUse pesticides as much as possible to use low-toxicity and high-efficiency insecticides, and biological pesticides to reduce pesticide residues;Underground pests can be controlled by agricultural measures, autumn irrigation to eliminate the eggs of the mole insects, irrigation to eliminate the pests.

5. Approximate analysis of pesticide residues.

Abamectin: Abamectin is easy to decompose due to light, and different manufacturers will add different additives to make it last longer. Usually the half-life is about 5 days, and the final decomposition is generally 15 days.

Chlorpyrifos: As an alternative to the highly pesticide 3911, the market for chlorpyrifos was once very hot. The half-life of chlorpyrifos is two months, and it is easily affected by precipitation and irrigation, and it leachates greatly in the soil.

Phosphine: sensitive to light and easy to decompose, but the residual period in the soil is long, generally about two months.

Rational use of drugs, prohibition of medication during the safety period, and prohibition of medication before harvesting. Improve the efficacy of the drug and prohibit the excessive pesticide residues.

It may damage the roots of vegetables, affect the growth of vegetables, lead to serious pesticide damage, may cause vegetables to have no way to grow, and may lead to the death of vegetables.

It will affect the value of vegetables, affect the nutritional degree of vegetables, and will also lead to the presence of pesticides on vegetables, and will also cause some harm, and may also lead to a decrease in the yield of vegetables.

It may cause pesticide damage, which may affect the quality of vegetables, and may also lead to a decrease in the nutritional value of vegetables. It can cause deformities in vegetables. There will also be pesticide residues.

It will affect the yield of vegetables, there are chemical drugs in vegetables, and there will be pesticide residues, which is not conducive to the sale of vegetables and will affect the economic profits of vegetables.

In the process of growing vegetables, it is inevitable to suffer from some pests and diseases, and the use of pesticides is also unavoidable. Whether the control of underground pests will have a residual impact on vegetables can be prevented from the following aspects:

1. Try to use low-toxicity pesticide products.

Some of the drugs used to control underground pests are very toxic, some are moderately toxic, some are low-toxicity, and some are usually used with high-efficiency, low-toxicity pollution-free products that will not have any effect, such as phosphine.

Granules, avermectin.

granules, etc. But those products that are highly toxic and high residue, such as carbofuran.

Phosphine, chlorpyrifos.

Organophosphorus products such as granules can have an impact on vegetables with excessive pesticide residues. At present, the use of these products in vegetables is basically prohibited or restricted. But in any case, it can have a residual effect in vegetable production.

2. Spray in strict accordance with the dosage specified in the pesticide label.

In order to avoid excessive pesticide residues, spraying should be carried out in strict accordance with the dosage specified on the pesticide label. In the process of using pesticides, it is necessary to alternate the use of pesticides, mix them reasonably, and avoid long-term use of the same pesticide products, which has poor control effects. Reasonable rotation and stubble retention of vegetables can also be implemented.

At the same time, to avoid harvesting crops at safe intervals, it is best to stay as long as possible away from the time of the last spraying.

3. Chemical control.

Nicotine. Pesticides must be used to control underground pests. Since this pesticide is not only low in toxicity but also has good systemic properties, it can be used in vegetables and other crops. In recent years, the app has become more and more recognized by farmers. For example, thiamethoxam is commonly used.

Thiaxoxam, imidacloprid.

All are nicotine insecticides and have a wide range of uses.

Fourth, the prevention of vegetable diseases and pests.

When using farmhouse fertilizer, it should be fully fermented to kill the eggs of pests and reduce the occurrence of pests; Use low-toxicity and high-efficiency pesticides, biological pesticides to reduce pesticide residues; Underground pests can be controlled with agricultural measures, winter eggs can be eliminated by autumn irrigation, and pests can be submerged by irrigation.

5. General analysis of pesticide residues.

1.Avermectin: Abamectin technology products are easy to decompose when exposed to light. Different manufacturers will add different additives to make them last longer. Usually half-life.

It takes about 5 days, and the final decomposition is usually 15 days.

2.Chlorpyrifos: As an alternative to the high pesticide 3911, the market for chlorpyrifos was once very hot. Chlorpyrifos has a half-life of two months and is susceptible to precipitation and irrigation, leaching in the soil.

3.Phosphine: sensitive to light and easy to decompose, but the residual period in the soil is long, generally about two months.

Use drugs rationally, do not use drugs during the safe period, and do not use drugs before harvest. Improve the efficacy of the drug and prohibit excessive pesticide residues.

1.If a low-pesticide toxicity drug is used, it will be recycled by the vegetables and will not have a residual effect. 2.

In the case of avermectins, it has the property of being easy to decompose when seen by light, and it will have a residual effect on vegetables. 3.If it is a nicotinoid insecticide.

Because the residue of this type of agent vegetables is particularly low.

In the production process of vegetables, if pesticides are used, they will have a certain impact on health to a greater or lesser extent. Therefore, it is necessary to breed good varieties and reduce the use of pesticides.

Yes, there will be a lot of pesticides on the surface, so they will remain on the surface of the vegetables, which will also lead to a decrease in the yield of vegetables and a decrease in quality.

There will be an impact, when using drugs to control underground pests, we should try to choose a relatively low toxicity, which can reduce the impact on vegetables.

Yes. Because these things have a certain toxicity, vegetables will also absorb these things, so the vegetables produced in this way have some harm.

Yes, because these things are inevitably toxic, vegetables will also receive these equipment, and the vegetables produced as promised have some harm.

Pollution-free vegetables are the common aspirations and requirements of many people, how to use pesticides rationally on vegetables, is the knowledge that many vegetable farmers need to know about the production of pollution-free vegetables. The basic principles of rational use of pesticides are science, safety, economic development and high efficiency. The specific description is as follows:

Methamidophos, hydroxyl 1605, dimethoate, carbofuran, etc. are highly toxic pesticides, DDT is a high residue pesticide, and the state stipulates that all high toxicity and high residue pesticides are not allowed to be used on vegetables. Every vegetable farmer must strictly implement it, which is also a must for safety.

1) Diseases and pests that can be controlled by non-organic chemical pesticide methods should be controlled with as little organic chemical pesticides as possible.

If Spodoptera liturae larvae have the habit of swarming, they can be manually removed or pinched to assist in control, so as to reduce drug control.

2) Manipulate the total area and frequency of pesticide application as much as possible. Those that can be treated are not universally treated, but those that can be treated at the same time (such as Spodoptera litura, Spodoptera exigua, diamondback moth can be treated, whiteflies and budworms can be treated, and sclerotinia and gray mold can be treated at the same time) are not treated alone, so as to reduce the number of drugs and maintain the nemesis.

Different pests and diseases react differently to pesticides. Similarly, different pesticides also have their own application fields, and the control goals of pesticides will also change with the emergence of resistance, so it is necessary to select the best pesticides according to the control objectives, pesticide performance and resistance level. In addition to having a good control effect on the control target, the selection of pesticides also needs to be safe and harmless to food crops.

Whether to use drugs and when to use them should be carried out in a timely manner according to the effects of different pesticides and insect pest habits and the growth stage that is easy to be poisoned and die in the process of production; When using pesticides, microbial pesticides should be preferred, and according to the amount of pests and diseases is not to achieve the control index value, but also need to take into account the climatic conditions, such as rainy days are not suitable for sprayers, in the morning before the dew is not suitable for sprayers, when the wind is strong and high temperature in the afternoon to stop spraying, diseases and small and medium-sized insect pests should generally produce early medication, noctuidae insect pests should be used at dusk, etc.

Long-term repeated use of the same pesticide for the prevention and control of a pest will definitely make the microorganism gradually improve its resistance to the agent, so that the control effect will be greatly reduced. At the same time, because there is interactive resistance, that is, a pest that has become resistant to a certain agent can also become resistant to some similar agents that have not been used, and then the effect of the drug is reduced. One of the most effective ways to get rid of and delay resistance is to rotate two pesticides with different mechanisms of action.

You can choose lime water, you can also choose potassium permanganate solution, you can use brown sugar and rice vinegar to stir, tea seed cake water to remove insects, pepper water, onion water and so on.

We can use a variety of vegetable interval planting methods, so that it can have the effect of insect repellent, is a good physical pest control method, you can also use the plant ash precipitation liquid spray control, or directly sprinkle the plant ash on the leaves, in addition to the use of daily things at home to synthesize spraying liquid, such as washing powder, urea and water in the ratio of 1:4:400 diluted, stir evenly, spray on the vegetable leaf surface can control large green worms, aphids and other insect pests.

You can use garlic juice, plant ash, vinegar, olive oil to solve the problem, and choose the right thing according to the actual situation of the plant.

Natural factors: When the ambient temperature, humidity, light and other conditions are abnormal, crops are susceptible to pests and diseases. Human Factors:

Extensive management can also lead to frequent pests and diseases. Pathogen invasion: The planting plots have not been disinfected, leaving bacteria and pest eggs.

Poor stress resistance: nutrients are consumed during growth, and their own stress resistance is weakened and eroded.

1. Natural factors

During the vegetable planting period, when the environmental temperature, humidity, light and nutrition conditions are abnormal, the crops are susceptible to pests and diseases, such as when the temperature is too high or too low, it will cause harm, and during the rainy season, the air humidity is too high and bacteria breed, and the lack of light will cause poor growth.

2. Human factors

In addition to natural factors, extensive management of vegetables will also lead to frequent pests and diseases, no timely water and fertilizer supplementation of nutrients, improper cultivation and weeding, overgrown weeds in the field provide a hotbed for pests, improper harvesting causes vegetable injuries, incision infection and insect invasion.

3. Pathogen invasion

The planting plot of vegetables has not been disinfected, leaving bacteria and pest eggs, after planting, it will be infected by the root system, and the bacteria will erode from the inside after infection, so that the plant will be infected from the inside, and the pests at the bottom will also erode the stems and leaves, and the whole plant will die when the disease is serious.

4. Poor resistance to stress

The probability of infection during the growth of vegetables is mainly related to their own stress resistance, the high incidence period of general pests and diseases is incomplete in the cotyledon stage and true leaf development, at this time, the root system of the crop is not fully grown, and the internal nutrients are consumed by a large amount of growth, and the stress resistance is weakened and eroded.

Beauveria bassiana effect is also good, the general 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% octathion 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 to be able to eliminate most of the soil pests at the same time, and at the same time do not hurt the root system of the crop, 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, aggravation of pests and diseases, so at the same time of seed dressing, for the plots with serious pests and diseases, you can use a two-pronged approach, before sowing, you can sprinkle chlorpyrifos and phosphine particles, but because of the wide application of pre-thiamethoxam and imidacloprid, some pests have developed resistance, so it is recommended to use compound fertilizers, insect control and synergistic effect is more significant, such as single thiamethoxam fertilizer granules.