How long is the safety interval of commonly used pesticides in vegetables?

Many farmers usually do not pay attention to the safe time interval before the vegetables are put on the market when applying pesticides to prevent pests and weeds, resulting in a large amount of pesticide residues on the vegetables. In order to better enable customers to eat safe and secure vegetables, vegetable growers should pay great attention to the interval between pesticide use to ensure safe use and safe eating.

When some farmers use pesticides to prevent pests, diseases and weeds, they usually do not pay attention to the safe medication interval before the vegetables are put on the market, resulting in excessive pesticide residues on vegetables. Therefore, many farmers are reminded to improve their understanding and pay attention to the interval between the marketing of vegetables after taking medicine to ensure that vegetables are pollution-free. Below, the author will share with you how long is the safety interval of common pesticides in vegetables?

1. Pesticide fungicide.

75% mancozeb wettable powder applied 7 days before marketing; 77% can kill WP for 3 5 days; 50% promethane wettable powder for 4-7 days; 70% thiophanate-methyl wettable powder for 5 to 7 days; 50% Nonliling WP for 4 to 5 days; 50% Gary 58% Rhizva Thunder Manganese Zinc WP for 2 to 3 days; 64% disinfectant alum wettable powder for 3 to 4 days.

2. Insecticides.

10% deltamethrin EC for 2 to 5 days; Permethrin.

for 2 days; Time emulsifiable concentrate is 7 days; 5% Leflin EC for 3 days; 5% anti-aphid wettable powder for 6 days; 10% quick-kill emulsifiable concentrate for 3 days; Lesburn.

emulsifiable concentrate for 7 days; 20% emulsifiable concentrate for 3 days.

20% fenvalerate emulsifiable concentrate for 5 days; The 35% thionphos period is 7 days; 20% deltamethrin EC for 3 days; 10% mapelik EC for 7 days; 25% quinthion EC for 9 days; 50% anti-aphid wettable powder for 6 days; 5% multi-Plebro WP for 7 days.

3. Acaricide.

50% bromodifen EC for 14 days; 50% Dazik wettable powder for 7 days.

Keep an eye out: methamidophos.

Methyl parathion, parathion, monocrotophos, phosphine, phosphine.

Hydroxyisosulfonate, tert-butylthion, hydroxythiocyclophos, phosphine, systemic phosphorus, carbocarb, aldicarb, methropha, thiocyclophos, fly toxin, thiathion, chlorazophos, benzophos, dimethoate, sodium pentachlorophenol contour.

Toxic and high residue pesticides should not be applied to vegetables.

The pesticide safety interval mentioned above refers to the minimum number of days for the pesticide residue in agricultural products to achieve the specified value after the application of organic chemical pesticides and the selection of all normal concentration values to prevent a certain type of disease.

The safety interval is about half a month, and it is best to eat vegetables after spraying pesticides for a long time to avoid pesticide poisoning.

Generally, it is about three days to five days, and within this time, the efficacy of pesticides is relatively high, and then sometimes it is around 7 o'clock.

The safety interval should be about 3 to 7 days, mainly according to the different pesticides, so there are different safety intervals.

There is no unified standard for this, we use different pesticides, so its safety interval is not the same. Let's say if we're using dichlorvos.

Or rather, trichlorfon.

Then its safety interval cycle is generally 7 days, only more than 7 days after can be picked, if not more than 7 days, then there will be this pesticide residue, will affect health, and does not meet food safety standards.

This is important to note. <>

Of course, if you use thisCarbendazimTo spray some crops for bacterial diseases, then its interval is about 20 days. For example, once a bacterial disease occurs like this eggplant, like this wheat, or like this fruit tree, we have to spray some carbendazim to sterilize, then its interval cycle should be 20 days, if it does not reach 20 days, do not pick or collect, because there will be pesticide residues, so this must be paid attention to, so as not to cause harm to the body. <>

In life, we also need to see how much the concentration of pesticides we use, taking this trichlorfon as an example, if the concentration used is, then its safety cycle is about three days. If you don't understand, you can also ask the boss who sells pesticides, ask him how much concentration he should use, how many days to interval, for example, to plant cabbage as an example, use this polyester emulsifiable pesticide, the concentration is about 10%, generally speaking, 5 days is a safe cycle. <>

If the pesticides used are:ChlorothalonilIf the concentration of this powder reaches 75% or more, then the interval period is about one week. In fact, the pesticides we use must be clearly understood, this manual has a clear record of this safety interval, if you don't understand, you can call the manufacturer, or pay tribute to the sales staff to inquire, so as to be able to do the bottom of the mind, so as not to cause unnecessary trouble.

The safety interval refers to the period from the last application to the harvest and consumption of the crop, that is, the time required from the spraying to the maximum allowable residue. The general safety interval is 7 days.

The safety interval is generally about three months to four months, and pesticides should not be used during this period, otherwise it will cause pesticide damage to crops.

The safety interval of commonly used pesticides for crops is generally about three days, and the application of pesticides should not be too frequent, otherwise the effect will be conflicting.

The pesticide safety isolation period is about half a month, because the effect of pesticides is very strong, and if the time is particularly short, it may be poisoned.

The timing of this is not uniform, because in general, it must be after 7 days, otherwise it will have a certain impact on the crops.

When many vegetable farmers use pesticides to control pests and diseases, they often do not pay attention to the safety interval before the vegetables are put on the market, resulting in a large amount of pesticide residues on vegetables. In order to enable consumers to eat safe and secure vegetables, vegetable growers should attach great importance to the interval between pesticide applications to ensure safe application and safe consumption. The safety interval for the use of several commonly used pesticides on vegetables is described as follows.

1.Fungicides: 75% chlorothalonil wettable powder for 7 days, 77% killable wettable powder for 3-5 days, 50% promethanum wettable powder for 4-7 days, 70% thiophanate-methyl wettable powder for 5-7 days, 50% Nonlilin wettable powder for 4-5 days, 58% Ruifude manganese-zinc wettable powder for 2-3 days, 64% disinfectant alum wettable powder for 3-4 days.

2.Insecticides: 10% cypermethrin EC for 2-3 days, bromopermethrin for 2 days, time EC for 7 days, 5% Leflin EC for 3 days, 5% anti-aphid wettable powder for 6 days, Efordin EC for 7 days, 10% fast enemy EC for 3 days, Lesben EC for 7 days, 20% fenvalerate EC for 5 days, 35% fenvalerate EC for 7 days, 20% fenethon EC for 3 days, 10% mapelic EC for 7 days, 25% quinthion EC for 9 days, 50% anti-aphid wettable powder for 6 days, 5% more Noble WP for 7 days.

3.Acaricides: 50% bromodifen emulsifiable concentrate for 14 days, 50% Dazik wettable powder for 7 days.

1.Use low-toxicity pesticides. With the continuous development trend of the chemical industry, there are more and more varieties of pesticides, and a variety of drugs can be selected to prevent a certain disease.

In order to better the safety of people and animals, low toxicity should be selected under the condition that disease can be prevented. Low residue pesticide species.

2.The concentration value of the liquid should be low. After the type of pesticide used in the selection is clear, the bottom limit of the drug power range should be selected when configuring the drug.

Because of the use of lower concentrations of the potion, it is to better human and animal safety, control costs, and prevent individual resistance to residual pests, thereby increasing the life of pesticides.

3.A wide variety of pesticide replacement applications. Because there are many types of diseases in vegetable fields, the trend is faster, and spraying is frequent.

If the same drug is used continuously, the target of prevention will become resistant to the drug and become less potent. Therefore, some different kinds of drugs with similar potencies are applied in place to prevent the development of resistance.

4.Pay attention to the timeliness of taking the medicine. To put it bluntly, the timeliness of taking the drug has a two-fold meaning:

When the disease is caused, seize the opportunity to take the medicine immediately, the sooner the better, in case you miss the time to cause the best medicine; When taking the medicine, the concentration value and total number of pesticides should be adjusted according to the growth period of vegetables and fruits, because the concentration value and number of pesticides are different in different growth periods of vegetables and fruits.

First, the pesticide fungicide 75 mancozeb wettable powder should be applied 7 days before the sale; 77% can kill wettable powder for 3 5 days; 50 Promethanin WP 4 7 days; 70 hydroxytobuzin wettable powder 5 7 days; 50 Nonliling WP 4 5 days; 50 Gary 58 Rhizin Thunder Manganese Zinc WP 2 3 days; 64 disinfectant alum wettable powder 3 4 days.

Second, the insecticide 10 fenmethrin EC 2 5 days; bromopermethrin for 2 days; Time: EC 7 days; 5 Riflin EC for 3 days; 5 Anti-aphid wettable powder for 6 days; 10. Quickly destroy the enemy's emulsifiable concentrate for 3 days, and Lesben emulsifiable concentrate for 7 days; 20 Aceoli EC for 3 days; 35 Optimal thionphos period of 7 days; 20 The safety interval of deltamethrin EC is 3 days; 10 Mapelik EC safety interval of 7 days; Quethion-25 EC safety interval 9 days; 50 The safety interval of anti-aphid wettable powder is 6 days; 5 The safety interval of multi-lebro WP is 7 days.

Third, the safety interval of acaricide 50 bromodifen emulsifiable concentrate is 14 days; 50 Dazik WP safety interval of 7 days. A few days ago, our country was constantly cloudy and foggy in temperature, and there was strong convective weather after rain and snow, which was extremely bad for the growth and development of vegetables in the maintenance equipment. In order to ensure the normal growth and development of vegetables in the maintenance equipment, China's scientific research experts especially suggest that farmers should see more of it to improve solar thermal power generation.

At this stage, the winter stubble vegetables in the shed are in the picking period, and the spring and winter stubble vegetables are in the emergence of seedlings. In the absence of sunlight or low sunlight, the high efficiency of photosynthesis of vegetables will be reduced, and the growth of the main stem will be stunted. In addition, the low light temperature is not conducive to the rise of the temperature in the shed, which endangers the growth and development of vegetables, and makes the main stem rise after the strong sun, which is very susceptible to diseases.

Agricultural and animal husbandry experts believe that vegetable greenhouses all over the country should use diffuse light on rainy days as much as possible, and untie the grass around the afternoon to ensure that the main stem sees light every day under the condition that the room temperature does not decline. If the room temperature is constantly decreasing, special attention should be paid to manpower to fill the calorific value and increase the indoor temperature to ensure that the main stem is not affected by cold.

The interval can be chosen for 14 days, and there is a particularly good planting in the vegetable garden. A lot of farmers do that now.

Two days is the best, so that it can be sterilized and disinfected, and it does not harm the crops, so that the crops can grow better.

It will take about a week, and then the effect of the medicine will be better, and it will not affect the normal growth of crops and will not harm human health.

It is more reasonable to use pesticides in the vegetable garden, preferably at intervals of about a week, so that the pesticides can be effective as soon as possible.

Imidacloprid is an effective pesticide that is often used for pest control on crops. In vegetable cultivation, proper application of pesticides is essential to protect the growth and quality of crops. When using pesticides, it is also very important to use them safely and in a standardized manner.

Safe use requires knowing the safe interval of pesticides to ensure that vegetables are not affected by chemicals before harvesting, while standardized use requires knowing how pesticides are used and dosage to avoid overuse.

According to the instructions of imidacloprid, the safety interval after the use of the agent is different for different vegetables. For example, after using imidacloprid, the safe interval for cucumber and tomato is 3 days, while the safe interval for fava beans and kidney beans is 7 days. This means that after application, you need to wait for a specified safety interval before harvesting.

It is important to note that the method of use and dosage of the drug are also very important. Before using imidacloprid, it is necessary to follow the instructions on the instructions to master the correct dosage and use of the drug. Excessive use of pesticides will have adverse effects on vegetables, and it is easy to overdose residual drugs in vegetables, affecting the safety of food.

It is worth mentioning that vegetables will be affected by a variety of factors during the growth period, such as climate, soil quality, growth environment, etc., which will also affect the metabolism of vegetables to pesticides and reduce the mold. Therefore, when using imidacloprid, it is necessary not only to pay attention to the safe interval and the correct use of the agent, but also to adjust and react quickly to different vegetable varieties.

In short, in the process of using imidacloprid, it is necessary to work in accordance with the norms, pay attention to the safe and correct use of drugs, flexibly adjust the use of drugs and dosages, and harvest and transport after the safety interval. This ensures the quality and safety of the vegetables and ensures that users can enjoy healthy food with greater peace of mind. <>