How to choose safe pesticides for growing vegetables in greenhouses?

First, how to choose safe pesticides for growing vegetables in greenhouses?

1.Before use, it is necessary to understand the performance and use method of each pesticide, and correctly select pesticides according to the characteristics and objects of diseases and insects in the shed, so as to achieve a target.

2. Considering the warm and humid environment in the shed, it is not advisable to spray in rainy days or high temperatures, so as to prevent spraying in the case of too high humidity in the shed and reduce the efficacy.

3. Rotation of drugs should be used alternately according to different types of pesticides with different mechanisms of action. The mechanism of action of various pesticides is different, and if attention is paid to rotation, pest and disease resistance can be avoided or delayed.

of the generation. Safe use of pesticides in the production of vegetables should be selected with high efficiency, low toxicity and low residues, do not increase the concentration of liquid medicine at will, the number of drugs can not be too much, and the drugs should be used strictly according to the interval

II,Choosing the right pesticide is important

The vegetables generally cultivated in the greenhouse are organic vegetables, and the most taboo thing for people is harmful pesticides, which are composed of some chemicals.

If you choose unsafe pesticides, it is harmful to our healthBecause the pesticides are hit on the vegetables, and then the vegetables enter our body and are eaten by us, which has a great impact on the human body, and it may not be reflected in a short period of time, but if it is a long time,It can lead to chronic poisoning in the human body and may even lead to Alzheimer's disease.

How important it is to choose safe pesticides, so when we go out to buy vegetables and go home, we must clean a few more dishes with water, and then soak them in hot water before stir-frying, isn't there a saying, can high temperature be disinfected, boiled, can generally eliminate 80% of crop residues, no one can guarantee whether there are pesticides on it.

Third, the advantages of organic vegetables.

Organic vegetables are relatively better, but it is quite expensive, the advantage of organic vegetables is that there are fewer residues in crops, organic vegetables use natural fertilizers, and ordinary vegetables are used with chemical pesticides, but there may be residual chemicals on it, which is harmful to the human body.

Personally, if you want to choose a safe pesticide, you must go to the relevant departments to consult at this time to see which pesticide is relatively safer.

First of all, before using pesticides, you should read the instructions of pesticides to know how to use pesticides and what crops are suitable for them. Secondly, the humidity in the greenhouse is different from the outside, so don't spray when the humidity is too high. Finally, try to choose low-residue pesticide varieties, and do not increase the pesticide concentration arbitrarily in order to pursue the effect.

Correct selection of pesticides, each pesticide has a certain scope of prevention and control objects. So it is necessary to understand the performance of each pesticide before use.

Pesticides are a very important strategic material in the process of agricultural production, and generally safe, effective and economical pesticides should be selected. Before purchasing, special attention should be paid to the name of the pesticide on the label, whether the following is clear, and then see if there is a pesticide registration certificate number, product standard number, production approval certificate number, and domestic pesticides.

The first is to choose the right brand according to the vegetables planted, and the second is to choose products with factory inspection certificates.

Plant vegetables and fruit trees on the balcony, don't use pesticides indiscriminately, try this "low-toxicity" insecticide.

Greenhouse vegetables can be exempted from chemical fertilizers.

A backpack-sized device that can "cure the disease" of insect pests based on the high concentrations of ozone that is produced and released. Shaanxi Zhengxing Electronic Technology Co., Ltd. research and development of this kind of greenhouse vegetable prevention instrument, will enable many greenhouse vegetables without chemical fertilizer to achieve the purpose of preventing pests, for the production and manufacturing of green organic food has brought another technical guarantee. Ozone is an oxidant, which has a strong practical effect on all kinds of insects and bacteria, and at the same time, it also has a strong potato dissolution effect on chemical fertilizers and organic chemical harmful substances, <>

It remains in the air for a period of time and then dissolves automatically and becomes O2. When the insect inhales ozone, the strong chemical effect of ozone will break the inhalation and circulation of the two, suffocating it to death, so as to achieve the purpose of insect control. Ozone can also destroy the somatic cells and membrane organs of various bacteria, killing somatic cells.

Ozone pest control has the characteristics of zero pollution, no residue, no dead ends, etc. It is playing an increasingly critical role in the future of agriculture.

Top dressing fast-acting fertilizer: After the seedling repair of frozen vegetables, the fast-acting basal fertilizer and phosphorus and potassium fertilizer can be topdressed immediately to promote the repair and growth of the main stem of vegetables. Before ultra-low temperature, potassium dihydrogen phosphate solution can be sprayed 1-2 times to improve cold resistance or 1 mu of dilute human and animal manure water 400-500kg, which can alleviate the thawing level of the soil layer and reduce chilling damage.

Topdressing 50-100 quintals of fire soil ash or grass ash in the vegetable garden can not only prevent cold and frost, but also have the effect of topdressing potassium fertilizer, and have excellent practical effect on the prevention of cruciferous vegetable brown spot disease.

Spray water or evapotrant: After 2-3 days of light frosting, the vegetables and seedlings planted in the shed should be shaded for a short time around the afternoon to prevent sudden lack of water and wilting due to strong light. According to the environmental humidity conditions, spray a small amount of clean water at noon to increase the ground temperature and environmental humidity, inhibit the drying and drying of the frozen mechanism, and promote the moisture absorption of the frozen mechanism.

3-4 days before the arrival of the cold snap, spray 30-40 times the liquid ** vapor inhibitor on the main stem of vegetables on a sunny day, and generate a layer of invisible antifreeze film on the leaves, which is conducive to reducing the plant respiration of the leaves, maintaining the human body temperature of vegetables, and achieving the purpose of anti-freezing.

Water injection and heat insulation: Irrigating or watering the frozen vegetables can improve the thermal conductivity of the soil layer, avoid the soil temperature from decreasing again, and alleviate the cold damage. Watering should be watered enough, after pouring water or watering, grasp the beneficial stage of rising temperature, turn over the soil and heat insulate.

Pruning and pruning: Immediately after frosting, cut off the frozen leaves of the young shoots. Even if the end of the pepper seedling is frozen, it can still sprout branches with good medical care, take one of the strong branches instead of the petioles, and cut off the other branches. After pruning and pruning the small celery cultivated in the open field, new shoots can also emerge.

Rush to sow seeds: In order to reduce property losses, you can rush to plant low-temperature resistant broccoli, greens, radish vegetables, and oily wheat vegetables after the weather warms up. It is best to rush to sow in China and small sheds, early budding, early growth and development.

A good way is to dilute the pesticide with water and then put it in a noisy watering can to use it, so that the pesticide application surface is more pure and efficient, and the vegetables can be protected.

You can use the grinding erection control instrument, you can use ozone, you can strengthen the management of greenhouse vegetables, to prevent pests and diseases, you can blindly attack to select high-quality varieties of fiber people, so that you can remove pests and diseases.

We must pay attention to the soil situation, pay attention to care, pay attention to watering, pay attention to fertilization, and choose the right varieties, so that we can avoid agricultural pesticides to a large extent.

You can ventilate more, and the sedan car will be fertilized, or more sunlight, or frequent watering, and you can close the vertical to learn the management and management skills of the greenhouse, so that you can not apply pesticides.

Frequent ventilation, scientific management of the cover, you can use a sedan car to flush some smoke and fog annihilation things, fertilization is also effective, and the temperature is well controlled, which can reduce the virus.

Choose a reasonable time to take medication. During the day, the temperature is high and the water evaporates quickly. It is easy to increase the concentration of the liquid after spraying, especially in the middle of the day.

We should choose to use the drug before 10 a.m. or after 16 p.m., which can reduce the occurrence of drug damage. We should always be aware of changes in the weather. Before it rains, we should take the medicine 1-2 days in advance.

The high incidence of viral diseases and various pests requires a variety of pesticides to control them.

Spraying is also time-consuming and labor-intensive. Therefore, many vegetable farmers will mix and add various pesticides every time, so that chemical reactions between different pesticides can not only not achieve the control effect, but also lead to the occurrence of pesticide pests. Don't mix it up blindly.

If pesticides and copper agents cannot be used in combination with foliar fertilizer, the effect of single spraying of foliar fertilizer is better. Spraying should be targeted, and the most serious diseases should be prevented and controlled first. Cover the greenhouse with plastic film or add a small arch.

Mulching can increase the temperature of the surface soil2, and the addition of small arch canopies can keep the temperature of the vegetable growing environment above 15. Using iron wire instead of bamboo poles and bamboo film, and using plastic ropes instead of bamboo poles as attachments, can reduce shade and improve photosynthetic efficiency. The purpose of planting vegetables in greenhouse mulching is to artificially create a suitable ecological environment, adjust the vegetable production season, adjust market demand, and promote high quality and high yield of vegetables.

It is an effective means to increase peasants' incomes. The suitable climate provides out-of-season vegetables, which completely solves the situation of relying on the weather to eat vegetables.

Especially in the northern region, people have fresh vegetables in winter, which is also the most important place for vegetable protection in China. We should apply fertilizer in a balanced way to promote the stable growth of vegetables. Completely decomposed organic farm fertilizer should be applied throughout the year; Apply refined organic fertilizers such as Ye Meifeng and high-energy organic fertilizers.

Change the way of local nitrogen and phosphorus application, reduce nitrogen, stabilize phosphorus, increase potassium, and apply micro-fertilizer. Fertilizer should be applied in batches and in an appropriate amount; If fertilizer damage occurs, a variety of active liquid fertilizers must be sprayed to mitigate the damage.

It should be noted that pesticides must be mixed with water to use, but absolutely not to put a lot of water, but also not to put very little water, must be adjusted according to a normal ratio.

First of all, it is necessary to wear protective clothing, pay attention to the concentration of pesticides when using pesticides, and also choose a variety of pesticides to use in rotation, and also do a good job of ventilation, and ensure the fertility of the soil.

First of all, we must prescribe the right medicine, but also should choose a better effect of pesticides, pay attention to the time and amount of spraying pesticides, but also need to pay attention to the proportion of pesticides, when spraying pesticides, we must choose to use in sunny days, should avoid rainy days and windy weather, spraying pesticides must do a good job of personal protection, avoid contact with **.

First of all, we must pay attention to the reasonable use of time and range, when spraying pesticides, we must get the plastic sheet down to prevent volatilization, and the pesticide will play the maximum role, we must spray pesticides in the afternoon, and we must cover it when spraying pesticides, and then after spraying, we must stay away from the greenhouse to avoid poisoning, and then after an hour or two, we must lift the plastic sheeting.

It is necessary to grasp the concentration of pesticides, but also to choose safe and pollution-free, try not to spray too much, but also to grasp the frequency of spraying, to grasp the way of spraying.

The biggest skill of greenhouse pesticides is that we should pay attention to the distance when spraying, and when there is time to spray, we should pay attention to the coordination of some water and pesticides.

The skill of applying pesticides is to pay attention to the angle of pesticide spraying, the way of pesticide spraying, the time of spraying pesticides, and the proportion of pesticides.

First of all, it is necessary to choose the time when the temperature is more suitable, you can choose at 10 o'clock in the morning on a sunny day, and you should choose the right pesticide according to different vegetables, and you must pay attention to the ratio and dosage of pesticides.

First of all, we should choose the right pesticides, but also should prescribe the right medicine, ensure sufficient light, timely watering and fertilization, strengthen the management of water and fertilizer, but also need to choose high-quality fertilizers, you can choose some pesticides, or fungicides, we must pay attention to the proportion of pesticides and the problem of dosage.

It is necessary to carry out light, and at the same time pay attention to the humidity in the greenhouse, and apply pesticides in combination with the temperature in the greenhouse, and pay attention to the problems of pesticide damage.

To ensure the moisture of the soil, it is necessary to grasp the ratio of water and pesticides, pay attention to the time of spraying, pay attention to the scope of spraying, and ventilate regularly.

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.

1. Herbicides.

Herbicide refers to a type of substance that can completely or selectively kill weeds, also known as herbicides, to eliminate or inhibit plant growth.

2. Acetochlor.

Acetochlor is a widely used herbicide. Successfully developed by Monsanto in 1971, it is one of the most important herbicide varieties in the world and one of the most widely used herbicides in China.

3. Buchlor.

Buchlorachlor (2-chloro-N-(2,6-diethylphenyl)-N-(butoxymethyl)acetamide) is a selective pre-budding herbicide. It is mainly used for direct seeding or transplanting of annual grass weeds and some broad-leaved weeds in paddy field control. It is also selective for wheat, barley, sugar beet, cotton, peanut and cabbage crops.

4. Paraquat.

Paraquat, chemically known as 1-1-dimethyl-4-bipyridine cationic salt, is a rapid herbicide with contact killing and systemic effects. It can be quickly absorbed by the green tissues of plants, causing them to die. It has no effect on non-green organizations.

It quickly binds to the soil in the soil and passivates it, and is ineffective on plant roots and perennial underground stems and roots.

5. Quinoxalin.

Quinoline is a chemical with the molecular formula C17H13ClN2O4. According to China's pesticide toxicity grading standards, Quinograss is a low-toxicity herbicide. Its light yellow uniform crystalline, the total ester content is higher than 95%, and the R body is greater than 90%.