What pesticides are contained in various fruits and vegetables

Pesticides can also be broken down by heating at high temperatures, such as blanching them in boiling water or stir-frying them in oil. Experiments have proved that some heat-resistant vegetables, such as cauliflower, beans, celery, etc., can reduce pesticide residues by 30% after washing and then scalding with boiling water for a few minutes, and then 90% of pesticides can be removed by cooking at high temperature.

Although peeling vegetables will cause some nutrient loss, it can reduce pesticide residues. Chen Chunxiu reminded that especially vegetables and most fruits that use more pesticides such as cucumbers and eggplants are best eaten by peeling. Jiang Weibo said that when eating apples, it is best to eat less around the pit, because the gaps in the pit will cause pesticides to seep in.

For fruit and vegetable detergents, Shan Weili, director of the Pesticide Residue Office of the Ministry of Agriculture, does not recommend that you use them too much, because the benzene ring in its chemical structure contains high toxicity, and the harm caused by residues on vegetables and fruits may be more serious than pesticide residues. In recent years, pesticide degraders, fruit and vegetable detoxifiers, etc., experts believe that they do not work for all pesticides. Pesticide degraders claim to use biological enzymes to degrade pesticides into carbon dioxide and water, Shan Weili said, they have compared the effects of some pesticide degraders, and their effects are very unstable.

The fruit and vegetable detoxification machine claims to be able to eliminate pesticides on the surface of vegetables and fruits with ozone water, but it plays more of a bactericidal role and is difficult to destroy the chemical structure of some pesticides. "In fact, the impact of pesticide residues on food safety is not as serious as everyone thinks.

Tomatoes are uniformly ripened with ethephon. Leeks are mostly added to 1605 during irrigation in order to prevent maggotsThe color of the small persimmons after autumn is consistent, soft and slightly elastic, and it is ethephon-induced.

Some vendors also use bleach to clean apple rust, this apple peel is particularly bright, and there is a good smell, there are many things you can't think of, pork is not only injected with water but also added medicine to improve color, lean cattle feeding asthma medicine can increase fat in the short term.

Did you study this thing useful? You can't control other people's vegetable farmers... What pesticides do people want to spray.

It is estimated that it is a baby who wants to eat fruit and commit suicide.

<> in order to protect people's health and prevent and control vegetable pests, it is necessary to choose pesticides with high efficiency, low toxicity and short residue period, such as trichlorfon, dichlorvos, dimethoate, marathon, imidothion, carbendazim, tobulu, etc. However, it is also necessary to strictly comply with the regulations that vegetables can only be harvested and marketed 7 to 10 days after application.

What pesticides can not be used for vegetables.

1. There are pure Huaikai machine mercury preparations, such as Xilisheng, Sailisan, Fujilong, mercury, etc.

This kind of pesticide is highly toxic to humans and animals, and it is easy to accumulate in the human body when applied, such as pesticide contact with **, especially contact with the tearcus or spraying inhalation from the nostrils.

2. Organophosphorus preparations such as methylphosphine, etc.

This kind of pesticide is more toxic to humans and animals, it can enter the body through the mouth to poison people, and can also enter the human body through penetration and respiratory tract to poison people.

3. Organochlorine preparations.

Six. Six. 6. DDT.

The toxicity of these two pesticides is low, but because of its stable nature, it is not easy to decompose in organisms and soil, and the vegetables that have been applied to these two pesticides are often consumed, and their residual poison continues to accumulate in the human body, which is easy to cause chronic poisoning.

1. Water spinach. Because water spinach is often repeatedly picked for the most tender part of its upper part, the roots remain in the soil, resulting in the accumulation of pesticides in the roots. In addition, for water spinach planted in summer, vegetable farmers will constantly apply pesticides to the leaves to prevent insect pests.

In this way, the two add up to make water spinach the first pesticide residue vegetable."

2. Cucumbers. Many people buy cucumbers and think that the top flowers are "thorny" and relatively fresh. However, in general, the top flower of cucumber "wilts one day after the cucumber is picked." If the top flower of the cucumber is still fresh and there is a raised part at the junction, it is estrogen.

3. Cauliflower. Due to the shape and tenderness of the cauliflower, its appearance will be wrapped in a layer of paper or film during transportation. As a result, the pesticides on the cauliflower cannot be volatile. In addition, the surface of cauliflower is uneven and difficult to clean, so pesticides are easy to remain in it.

4. Cabbage. Removing pesticide residues from cabbage does not mean throwing away the leaves from the outer skin. Because in the growth process of cabbage, at least two pesticides must be applied.

One is hit on the roots of cabbage to avoid maggots eating the roots, and the other pesticide needs to be hit on the leaves, which is to prevent normal insect pests. Moreover, according to the experiment, the amount of pesticide residues in the inner layer of cabbage was generally higher than that in the outer orange deficiency layer.

5. Tomatoes. At present, tomatoes are mostly cultivated in greenhouses, and their stamens cannot be pollinated normally, so tomatoes are usually grown by vegetable farmers with some growth regulators on the pistils. This method of cultivation leads to the fact that tomatoes often have different shapes of deformities and hollows.

If the color of the tomato is red on the outside and green on the inside, it is a ripening agent.

Vegetables in different varieties of different planting methods, its yield per mu is also different, the yield per mu of cabbage is generally between 2500kg-4000kg, if you want to give vegetables pesticides, it is best to carry out in winter and spring, and do not use drugs in the morning, between 2:30-3:30 in the afternoon is more appropriate.

When spraying pesticides on vegetables, we must pay attention to spraying the back of the leaves, and we must also pay attention to the use of pesticides according to the occurrence of pests and diseases, and do not spray pesticides indiscriminately.

Vegetable spraying. Vegetables in different varieties of different planting methods, its yield per mu is also different, taking cabbage as an example, its yield per mu is generally between 2500kg-4000kg. If you want to spray pesticides on vegetables, it is best to do it in winter and spring, and it is more suitable to spray pesticides in the low temperature season.

Vegetable type dress vegetables pesticide time.

It is best not to use pesticides in the morning when vegetables are applied, generally between 2:30 and 3:30 in the afternoon, but it is better not to use pesticides for vegetables, only fertilizer, water, and more sunlight.

Vegetable pest and disease prevention and quiet treatment of drugs.

1. Disease spraying:

Common diseases of vegetables are: wilt, root rot, cataplexy, blight, bacterial wilt, etc., you can choose 75% chlorothalonil wettable powder with 600 kg of water, 70% methyl tobuzine with 1000 kg of water, spray at the beginning of the disease, spray once every 7 10d.

2. Pest spraying:

Common insect pests of vegetables are: diamondback moth, pseudo-cabbage aphid, southern yellow thrips, etc., with 50% marathon emulsion with 1000 kg of aqueous solution, or 50% pine borer emulsion, with 1000 kg of water to rent slag solution, etc., they can be completely eliminated by spraying them on the plant 1-2 times.

3. Contraindications for pesticide use:

1. When spraying pesticides on vegetables, you must pay attention to spraying the back of the leaves, and it is best not to spray on the front of the leaves.

2. When spraying pesticides on vegetables, we should also pay attention to the use of drugs for the occurrence of pests and diseases, otherwise spraying some inapplicable pesticides will not only not eliminate pests and diseases, but also not good for the growth of vegetables.

Generally speaking, fruits and vegetables that are easy to grow insects and are difficult to control after insects are often varieties with serious pesticide pollution. For example, pesticide residues such as apples, pears, plums, grapes, strawberries, watermelons, oranges, and bananas in fruits are more serious, while fruits with shells such as lychee and longan are less polluted. Vegetables with heavy pollution include leafy vegetables and fine vegetables, such as Chinese cabbage, green cabbage, chicken hairy cabbage, leeks, spinach, rape, etc., while root vegetables, melon vegetables and fruit vegetables (such as potatoes, pumpkins, cucumbers, bitter gourds, tomatoes, squabs and onions) are relatively less polluted by pesticides, and the nutrients of these vegetables are also higher.

Regarding the statement that "there are no pesticides when buying vegetables with insect eyes", Professor Li believes that there is no scientific reason. Because it is difficult for vegetable farmers to kill all pests at the same time when spraying, after a long time, the pests will become resistant, and when vegetable farmers spray again, they will escape, and then "kill will come back". Therefore, the presence of insect eyes on vegetables does not necessarily mean that there are no pesticide residues.

In addition, the skin of vegetables has a layer of wax, which can play a role in preventing pests and toxic substances. Once the skin of vegetables is damaged, various bacteria and other pathogenic microorganisms will take advantage of the void to enter, which is not conducive to human health.

In the 2020 pesticide residue ranking, 12 commonly eaten vegetables and fruits are on the list, why do you need to use pesticides.

1. Pesticides prohibited by the state (23 kinds).

666, DDT, toxaphene, dibromochloropropane, insectamidine, dibromoethane, herbicide, aldrin, dieldrin, mercury preparations, arsenic, lead, dichlorbis, fluoroacetamide, glycofluoride, rat poison, sodium fluoroacetate, rat silicon, methamidophos, methyl parathion, parathion, monocrotophos, phosphine.

2. Pesticides (19 kinds) that are not allowed to be used on vegetables, fruit trees, tea, and Chinese herbal medicines are prohibited from being used on cabbage; It is forbidden to use dicofol and fenvalerate on tea trees; It is forbidden to use butyryl hydrazide (bijiu) on peanuts; prohibit the use of terbutylthion on sugar cane; It is forbidden to use methylphosphine, methylisosulfonphos, tert-butylthionphos, methylthiocyclophos, phosphine, systemic phosphorus, carbofuran, aldicarb, aldicarb, methropsis, thiocyclophos, fly phosphine, thiophos, chlorzophos, benzophosine in vegetables, fruit trees, tea, and Chinese herbal medicines.

In addition to the above pesticides, they can be used, but there are other restricted pesticides for green vegetables and organic vegetables.

Highly effective and low-toxicity, such as dichlorvos.