Do you know the standards for the use of pesticides in vegetables?

In the prevention of diseases, farmers have not paid attention to the application interval of vegetables and fruits before they are sold, resulting in excessive pesticide residues. I now introduce the use standards of vegetable pesticides in detail as follows, for farmers to refer to learning and training:

The safety interval of % bromodifen EC is 14 days.

Dazik wettable fertilizer safety interval of 7 days.

Mancozeb wettable powder is applied 7 days prior to sale.

It can kill wettable powder for 3-5 days.

Promethine wettable powder for 4-7 days.

Thiopanate-methyl wettable powder for 5-7 days.

Nonliling WP for 4-5 days.

Garry 58% Ruixin Thunder Manganese Zinc WP for 2-3 days.

Disinfect alum wettable powder for 3 to 4 days.

% deltamethrin emulsifiable concentrate for 2-5 days.

5% bromopermethrin for 2 days.

5% time emulsifiable concentrate for 7 days.

Leflin EC for 3 days.

Anti-aphid wettable powder for 6 days.

8% Aifu factory emulsifiable concentrate 7%.

Quickly destroy the enemy's emulsifiable concentrate for 3 days.

7% Lesben EC for 7 days.

Aceoli EC for 3 days.

The safety interval of fenvalerate EC is 5 days.

The period of optimal thionphos is 7 days.

The safety interval of deltamethrin EC is 3 days.

The safety interval of mapelik EC is 7 days.

14. The safety interval of quinthion 25% emulsifiable concentrate is 9 days.

The safety interval of anti-aphid WP is 6 days.

The safety interval of Multi-Liberty WP is 7 days.

1. The solution of the soil layer is to apply the herbicide to the surface layer of the soil layer or rock layer, apply the herbicide before planting or germination, and apply the herbicide before planting.

2. After the soil layer is solved, a certain thickness of the medicinal soil layer can be produced in the surface soil. Herbicides only have a destructive effect on the germinating weed seeds, in order to make better use of the soil layer to solve the actual effect, it is necessary to apply the pesticide when the weeds are concentrated and germinated.

3. Watering before application, or after precipitation. The total number or neat level of weed germination is immediately related to the actual effect of hoeing, and the left and right should be integrated with tillage, watering, covering and other countermeasures before and after pesticide application, resulting in a lot of concentrated germination of weeds. The method of solving the soil layer can be the sprayer method.

Pouring method or medicinal soil method.

Know that it is necessary to use the appropriate amount of pesticides according to the situation of pests and diseases, to prescribe the right medicine, not to use too many pesticides, and pay attention to the amount of pesticides.

Of course, I know the standards for the use of pesticides, and when using pesticides, I must use them without destroying the soil and crops.

Know that pesticides should not be used indiscriminately, do not use pesticides with strong toxicity, pay attention to the composition of pesticides, and pay attention to the proportion of pesticides.

Nowadays, with the use of chemical pesticides, the problem of pesticide residues has attracted people's attention more and more, when people plant pollution-free vegetables, in order to solve the problem of excessive pesticide residues in vegetables from the source, while using the panacea, the prevention and control of pests and diseases, how to scientifically and reasonably choose the use of chemical pesticides, and control the level of pesticide residues below the green agriculture that allows the development of green agriculture, has become an inevitable trend.

In addition to high efficiency and quick effect, the most important thing for pollution-free vegetables is that they are safe, low toxicity and low residue. Pesticides can be quickly digested in nature (such as hydrolysis, photolysis or microbial decomposition), do not pollute the environment, cause less damage to natural enemies and pollinators, and will not cause pesticide harm to vegetables. So, what are the pesticides suitable for the production of pollution-free vegetables?

Biopesticides. Biological pesticides have special control effects on pests, with high efficiency, low toxicity, no residue, slow resistance to insecticides, etc., and are highly safe pesticides.

Such as bacterial insecticide BT (Bacillus thuringiensis microbial insecticide), avermectin. alkaloid plant insecticides; fungal insecticides (Beauveria bassiana, metarhizium anisopliae); Insect viruses, insecticides, and insect pheromones (e.g., sex attraction). Biochemical pesticides.

Azirotin is an antibiotic produced by actinomycetes, which is currently in circulation in China by many names, including imported insecticides, domestic marine insecticides, Saifu, Aifudin, mites, etc. It is mainly used for the prevention and control of small leafhoppers, Libyan Americans, mites, etc., and has achieved obvious economic and social benefits.

Specific insecticides: including isopropanol, carcarbazole, imon, etc. It is mainly used to control noctuidae pests.

It is a high-efficiency, low-toxicity and low-residue pesticide. 5% high efficiency refers to imidacloprid with a content of 5%, which belongs to the nitromethyl group, with high efficiency, low toxicity and low residue. It is mainly used to control aphids, thrips, whiteflies and other stinging insects.

The drug has a long duration of efficacy, the use of * can control pests for about 10 days, aphids can be controlled for up to 20 days, the current circulation of similar products and Kangfuduo, a net, aphid lice net, etc.

There are many commonly used pesticides for pollution-free vegetables, such as insecticides, Saifu insecticides, Aifuding insecticides, mites and insecticides, and these pesticides are very effective, they can kill all pests and diseases, and these pesticides can promote the growth of plants, and if the situation is very good, they can also increase the yield of vegetables, so we must pay attention to this aspect when planting vegetables.

There are biological insecticides, microbial insecticides, insect pheromones, insecticides that combine biology and chemistry, and bacterial insecticides, which are pesticides that are pollution-free to vegetables.

Nutrient solution, gentamicin, insect pesticides, pine resin mixture pesticides, stone sulfur pesticides, these pesticides are pollution-free and help crop growth.

There are some pesticides, and there are some fungicides. It also contains some biopharmaceuticals. Be sure to use double-A drugs, and also learn more about the guidelines for use.

There are biological pesticides, insect growth regulators, high-potency selective agents, new antibiotic preparations, and plant-derived pesticides.

The use of disease-resistant varieties is the basis for reducing the incidence of vegetable diseases, but it is necessary to select improved varieties suitable for local production and manufacturing to increase yield, resist diseases and insects, and have strong drought resistance.

1.Effective crop rotation and stubble. For example, the rotation of eggplant and bean vegetables and onions, ginger and garlic vegetables can not only alleviate the disease clearly, but also have the practical effect of high yield.

Crop cultivation technicality.

2.Eliminate diseased plant residues. It is a good way to prevent diseases by eliminating diseased plant residues, vine blight, and weeds, and destroying and burying them in a centralized manner, and cutting off the transmission route.

3.Reduce ambient humidity. Since pathogenic bacteria can only multiply in large quantities and harm vegetables when the environmental humidity is high, the environmental humidity in the field should be reduced as much as possible to reduce the occurrence of diseases.

4.Effective fertilization. It is best to put formula fertilizer on vegetables, and mainly to apply good organic fertilizer as the leading, use phosphorus and potassium fertilizer with each other, manipulate the amount of fertilizer of base fertilizer, and apply nitrate nitrogen retarder dicyandiamide in the middle and late stages of growth and development to avoid the accumulation of phosphate in vegetables and environmental pollution.

5.Soilless cultivation techniques are used. This method can artificially reduce the number of pathogenic bacteria, which is a very good way.

6.Set up shade nets. If it is a greenhouse vegetable, set a shade net in the ventilation hole of the greenhouse to prevent the invasion of scale insects, bud worms and other insect pests, and reduce the chance of pest and disease infection.

1.Choose "five changes and one promotion". That is, change "dripping film to no drip film", change "arched shed open field cultivation to arch shed agricultural mulch film full coverage planting", change "flat furrow planting to high ridge planting", change "open water irrigation to dark irrigation under the film", change "watering flowers in the middle of the greenhouse to water flowers at high altitude on the ridge of the shed"; The moisture-proof ditch at the forefront of the lifting shed collects the membrane water in the ditch to remove and infiltrate into the ground to reduce the water volatilization of the arch shed.

2.Grasp the technical nature of "three watering, three non-watering, three control" water injection. That is, do not water on rainy days, do not water on sunny days, do not water at noon, water in the morning, and do not water in the open and dark water; Seedling manipulation watering, even cloudy manipulation watering, ultra-low temperature manipulation watering.

3.Improve light and temperature management methods. Frequently scrub the greenhouse film to maintain the excellent light transmittance of the greenhouse film, improve the light, increase the temperature, and reduce the air humidity; According to the thickened wall, double film covering, digging cold ditch and other countermeasures, the cold injury and physiological diseases of vegetables can be reasonably alleviated.

Pesticide residue standards are based on the toxicity of pesticides, the amount of pesticide residues in agricultural products, our food consumption structure, etc., and the safety values calculated using risk assessment techniques. When setting standards, they are based on the maximum possible risk, that is, the maximum amount that a person can eat and the maximum amount of a certain agricultural product that can be eaten every day of his or her life. On this basis, taking into account the species differences and the safety of pregnant women and children, the safety factor is increased by a factor of 100, so the standard is very strict and there is a large insurance factor.

Therefore, pesticide residues in agricultural products are safe as long as they are within the scope of national standards. At present, China has formulated 3,650 pesticide residue standards, involving 387 kinds of pesticides and 284 kinds of foods, covering almost all major agricultural products such as vegetables, fruits, and grains.