How to remedy the pesticide damage of vegetables grown in greenhouses?

When planting pasta in vegetable greenhouses, the pharmacology is not clear, the dosage is not allowed, and the time is not appropriate, which will cause weakness to the vegetables in the plastic greenhouse, lead to mild human growth or atrophy, lead to unbalanced reproductive growth, and the heavy leaves will wither, and the deformity of vegetables will directly affect economic interests. Therefore, in the management of vegetable greenhouse planting, it should be tracked and observed in time after spraying pesticides or foliar fertilizers. In particular, it is best to spray the new agent for the first time on a small area and then apply it to the entire warehouse.

After the agent is missprinkled or weakened, quickly spray water to wash it off and wash the surface of the affected plant. The pesticide damage caused by alkaline agent is the pesticide damage caused by the appropriate amount of vinegar and acidic agent when spraying water, and 01% quicklime is added when sprinkling water, which can neutralize the agent and decompose as soon as possible. When the weather conditions are adapted, it is necessary to pay attention to the ventilation of the shed, reduce moisture, and contribute to the emission of harmful gases.

Weakness caused by aerosols usually shows symptoms after a few hours. Although there are mild symptoms of necrosis that do not express from time to time, some leaves have a sclerosis phenomenon, resulting in the growth rate of hardened leaves being slightly lower than that of normal leaves, and generally has little effect on growth. Symptoms appear after a few hours of severe damage, early part of the leaves wither, slightly drooping and turning brown, and the affected parts gradually dry up, forming irregular white necrotic spots.

Some severely damaged leaves have necrotic spots that expand, causing all leaves to wilt and die, leaving only the heart lobes, all of which wilt and die. The active ingredient of the tobacco agent is cooled into particles in the air, and the particles collide with each other to condense and precipitate, and adhere to the surface of vegetable leaves. Smoked for 5 to 6 hours, the concentration of harmful chemical gases is high and relatively stable.

If it is sealed for too long, the longer it is in contact with the crop, the greater the damage will be, and beyond the tolerable limit, the crop will burn and become fragile.

The indoor temperature is too high and it is easy to weaken, and the respiration is vigorous under the expansion of the leaf stomata at high temperatures. At this time, the medicine easily burns vegetable leaves. Especially after the use of smoke agents, it may become more fragile if it is not ventilated in time.

If it is not used properly, the plant cannot recover its growth after the loss of the drug, and it should be replanted in time. Strengthen fertilizer and water management and temperature and humidity management, spray the leaves, and guide vegetable crops to resume growth as soon as possible. If possible, I would choose to do it after sunset on a sunny evening.

Insecticide smoke emits a large amount of smoke and has a high concentration, so it is necessary to smoke in a short time. Smoking time is usually 4-5 hours is appropriate. The concentration of the mist is then reduced by ventilation.

The small use of vegetables, especially when the dosage is too large, the concentration of the active ingredient of the pesticide also exceeds, which exceeds the tolerance limit of the crop, and is easy to cause weakness.

Watering and detoxification: the pesticide damage caused by irrigating the roots with some pesticides or using herbicides under the mulch film can be properly watered to reduce the accumulation of harmful substances in the roots, and can also increase the water in the cells in the plant, so that its metabolism speed is accelerated, and the relative content of harmful substances in the cells can be reduced.

1. In the event of slight pesticide damage, the method of strengthening fertilizer and water management can be used to restore the normal reproductive function of vegetables. 2. It is necessary to select the right pesticides, especially herbicides, which should be applied carefully. 3. Control the dosage and concentration of pesticides, and avoid reusing a pesticide.

4. Do not mix pesticides at will. 5. The application of pesticides should avoid high temperatures, and the instruments that have been applied with herbicides must be cleaned before they can be used again.

First of all, it will be affected by natural factors, including the quality of soil and weather, these two factors are the most direct impact on vegetable planting, less rain and more rain are not conducive to vegetable planting, and there is also a pollution near the factory, which will also affect the survival rate of vegetables.

If you want to reduce this pesticide damage, then it is necessary to avoid spraying pesticides at high temperatures, because it is easy to burn these vegetables at high temperatures. In addition, it should be noted that when spraying pesticides, you must pay attention to this amount, and you must do it according to the instructions.

Generally climate, temperature, manpower time. I think you should spray more pesticides, and in addition it is better to let him and the sun shine. Carry out photosynthesis.

If the vegetables in the greenhouse often have the problem of yellow leaves, it is necessary to pay attention to choosing the right fertilizer, watering regularly, strengthening sun exposure, keeping the environment warm, and pruning frequently.

We must use all kinds of pesticides scientifically, we need to pay attention to light, we need to pay attention to the situation of moisture, and we need to pay attention to the condition of the soil, so as to better avoid problems.

You should fertilize and spray vegetables appropriately. In this way, it can get nutrients and also get rid of some pests.

The planting time of greenhouse vegetables is much shorter than that of open-air vegetables, and at the same time, greenhouse vegetables can be prevented from bad weather, pests and diseases in a timely manner. But we know that greenhouses are generally impermeable, which leads to the dampness inside the greenhouse breeds many bacteria and pests, so how should we prevent the occurrence of vegetable pests and diseases in greenhouses, the following will introduce you to several prevention and control methods.

1. Pay attention to observation and early detection of pests and diseases.

Once it is found that there are water stains and mold on the leaves, it can be determined that the disease has begun to be infected, and attention should be paid to prevention and control in advance. At this time, the number of pathogenic bacteria is small, and the control effect is good. Only 1-2 sprays of protective agent can achieve a good control effect.

Observation position: Grasp the two key positions on the front of the greenhouse and below the air outlet. Downy mildew, gray mold, grape wilt, etc. are all damp-loving diseases, which mostly occur in front of the shed.

Try to discharge the dew on the shed film to the outside of the shed to avoid water accumulation in the front of the shed, resulting in excessive humidity and easy to induce moisture-loving diseases.

2. Do a good job of air disinfection.

The air disinfection technology is in line with the plant protection policy of "prevention first, comprehensive treatment", with outstanding effects and unique advantages. Air disinfection can kill pathogens in the transmission stage, especially suitable for gray mold, downy mildew, leaf mold and other diseases that mainly rely on airborne transmission. Compared with conventional methods such as fumigation and spraying, air disinfection tablets do not act directly on the vegetable body and are safer for vegetables.

There is no air damage with normal use, and there is no need for separate ventilation the next day. Moreover, the air disinfection tablet plays a gas role and will not adhere to the vegetables, so there is no residue after use, and there is no impact on the safety of vegetables. When the ventilation is normal on a sunny day, the occurrence of diseases is less, and the shed can be smoked once a week, and the prevention effect is very good.

When encountering cloudy days, watering or disease, the frequency of use should be increased, and it can be used once every 2-3 days. When discharging the medicine, it should be carried out sequentially from the inside of the shed to the outside of the shed, and the action should be rapid to avoid inhaling the disinfectant gas.

3. Reduce the source of disease and completely remove diseased branches and rotten vegetables.

In winter, gray mold, sclerotinia and cotton blight are common in fruit rot. Vegetable farmers often use symptomatic drugs for prevention. The main reason is that the diseased branches and rot are not removed, resulting in the continuous infection of the disease. To prevent disease, special attention should be paid to reducing pathogenic bacteria in sheds.

Clean up the shed in time after picking vegetables. Eggplant, tomatoes and other vegetables need to be harvested in large quantities to ensure ventilation and light transmission and reduce the occurrence of diseases. However, after picking the leaves, vegetable growers should pay attention to cleaning them from the shed in time to avoid the spread of germs.

Do a good job of surface sterilization, and the disease prevention effect is better. Most diseases overwinter and summer in the soil, and infections also spread from the soil. Good surface sterilization treatment can reduce the number of pathogens at the source and greatly reduce the occurrence of diseases.

It is necessary to do a good job of prevention, to use pesticides, fungicides, herbicides in a timely manner, to ensure ventilation, to ensure temperature, but also to ensure soil fertility.

Spraying pesticides immediately is the most correct way, and you also need to pay attention to the temperature, and slowly these pests and diseases will disappear.

You can eliminate pests and diseases, and you can also use some insecticides on the vegetables in the greenhouse, so that all pests and diseases can be eliminated.

Preface: When planting vegetables, one of the most troublesome things is the appearance of pests and diseases, which have a great impact on the yield of vegetables and directly affect the economic income of farmers. In order to control pests and diseases, many people will spray pesticides, but pesticides will have a certain impact on the growth of vegetables.

Leeks are a very common vegetable, if you want to control pests and diseases, we can mash leeks, take out the branches and leaves of leeks, and then add neutral laundry detergent, mix with a bucket of water, and spray on the vegetables. At the same time, the juice of leeks will not change the taste of vegetables, and it also has a certain effect of controlling pests, because the juice of leeks is stuck by laundry detergent, which can increase the effect of use. However, this method is more suitable for young leaves of vegetables that are damaged by aphids and red spiders.

It is recommended that we do not spray pesticides when planting vegetables, although pesticides have been decomposed in the process of cooking, but there are still some residues on vegetables, if eaten directly, it will have a great impact on the human body. You can find the seedlings with more insects at night, and then put a plastic bag on the ground to start beating the seedlings, let the insects fall on the plastic bag, collect about 200 grams, mash them, mix them with a bucket of water, and spray them. <>

Many people want to grow vegetables, but they are busy with work and do not have time to manage these vegetables well. It is suggested that we can increase the frequency of going to the vegetable field, manage these vegetables more, and if we find pests, remove the young leaves that have been eaten by pests in time. If it really doesn't work, we'd better choose pesticides with lower toxicity, and choose reasonable pesticides according to the nature of vegetables to achieve the best control effect.

It is best to soak it in salted water when washing vegetables, which can sterilize.

When planting vegetables, it is also necessary to spray some farm fertilizer on the roots, and it is also necessary to weed to prevent diseases.

When planting vegetables, the control of pests and diseases must be divided into three aspects, biological control, chemical control, physical control, and you can also prepare your own insecticides, and the effect is also different. The grown greens are covered with insect nets, which can also achieve the effect of control.

The main reason for plant disease is that there are conditions suitable for the occurrence of disease in the process of plant growth, such as poor plant growth, poor stress resistance, humid plant growth environment, and various reasons such as pathogens hiding on soil or plants.

For this kind of situation, in addition to making the plant nutrient balance, soil roots to improve the plant's ability to resist stress, you can use the foliar spray fungus fertilizer method to reduce the occurrence of disease, of course, it is not a fungus fertilizer, here to recommend two models, one is a fungus fertilizer made of em bacteria, through foliar spraying can reduce the occurrence of plant diseases, the other is a selenium-rich fertilizer containing biological selenium, this kind of fungus fertilizer not only improves the plant disease resistance effect is better, but also can improve the quality and taste of the fruit, Contributes to the production of selenium-rich fruits.

For biological control of plant diseases, it is a better way to help improve plant growth and quality, and there is no pesticide residue, and the use is more assured, but this kind of method can only be based on prevention, once the disease occurs, it will not work, but if the disease occurs very serious, it is recommended that you add organic fluorine anti-resistance additives when spraying to solve the disease resistance and improve the effect of spraying.

Pesticides can be used, so that pests can be prevented, and often** food growth conditions, so that diseases can be avoided.

You can control the temperature, or control the planting situation, or you can understand the factors that prevent insect pests, and then eliminate insect pests.

Pay attention to preventive work, and the humidity in the shed should not be too high. Due to the high humidity and suitable temperature in the greenhouse, it is conducive to the occurrence of pests and diseases. It is necessary to pay attention to covering plastic film, using water and fertilizer integration technology, strengthening ventilation and other measures to reduce air humidity.

Symptomatic treatment of pests and diseases that occur.

<> is mainly due to the high temperature and humidity of the greenhouse, which is suitable for the occurrence of pests and diseases, and the ventilation should be strengthened and the temperature should be strictly controlled. In terms of vegetable health care, non-toxic protective agents and health care agents should be sprayed. Spraying 400-500 times of Panacea oil on the foliar surface of vegetables can form a polymer non-toxic lipid film on the foliar surface, which has the effect of antifouling.

Foliar spraying of plant-based factors can improve the plant's ability to resist insect pests, and it is non-corrosive, non-polluting, safe and convenient.

In short, the daily management measures of greenhouse vegetable pest control are very important agricultural environmental control methods, on the basis of comprehensive agricultural control of different pests and diseases, different vegetables, we should take targeted biological and chemical measures to ensure that vegetables grow vigorously, high quality and high yield. Prevention first, comprehensive prevention and control, do a good job in environmental disinfection and soil disinfection before planting, reasonable fertilizer and water management, control the temperature and humidity in the shed, healthy cultivation of plants, enhance plant resistance, and timely use of drugs to prevent the disease in the early stage.

The humidity and temperature in the greenhouse should adapt to the survival of pests and diseases, before covering the greenhouse film, it is necessary to thoroughly clean up the weeds and branches or unrotted organic fertilizer, resulting in the breeding of diseases and insects, and carry out prevention and control measures for the greenhouse film, clean up the sundries and weeds and then use the rotten fertilizer, reasonably adjust the temperature and humidity, and strengthen field management. In terms of anti-freezing measures, greenhouses should pay attention to preventing physiological freezing damage of vegetables. The main purpose of greenhouse planting vegetables is to provide suitable temperature conditions for the growth of vegetables and realize the off-season production of vegetables.

Therefore, the key to technical management is to control the temperature and prevent frost damage. In terms of preventing frost damage, the thermal insulation effect of greenhouses is improved by thickening the wall, covering with double-layer film, and reducing holes with film pressing lines, so as to reduce the occurrence of vegetable frost damage and physiological diseases.