Growers often spray pesticides on fruit trees, can pesticides get inside apples?

With the improvement of quality of life, people will pay more attention to food safety.

Many people worry that when farmers spray pesticides on fruit trees, pesticides will enter the inside of apples. It will be found that this pesticide will generally enter the apple, and it will take a while before selling, and these pesticides will slowly disappear so as not to affect people's health.

When the grower sprays the fruit tree, the pesticide will enter the apple, although the apple is covered with a layer of bag, through the pesticide on the leaves or branches, the pesticide residue will also enter the apple. First of all, you need to understand why fruit farmers spray pesticides on fruit trees, this time is to prevent pests and diseases, if you do not use chemical fertilizers and pesticides, the yield of apples will be reduced, and the sale of apples without chemical fertilizers and pesticides will be higher.

Generally, the fruit is not edible within a week of spraying pesticides, but if it is eaten after a week, such fruit will be safer. Organic fruits and lettuce are also popular, and fruits and vegetables are generally not sprayed with pesticides until they are ripe. It will be found that the amount of fruits and vegetables needed in the market will be larger and larger, and the current level of agricultural technology is also limited, and it is very unrealistic not to spray pesticides on fruit trees, so that the yield will be reduced and cannot meet people's needs.

Only the degree of pesticides can be controlled, so as to prevent pests and diseases, and pesticides must have a certain pharmacology to prevent pests and diseases. Now the development of agriculture is to use some low-toxicity pesticides to prevent pests and diseases, and the management is more in line with the standards, these are tested and finally pollution-free fruits, so there is no need to worry when eating. However, when eating these fruits, they need to be cleaned, and the harm to the human body will be less and less, so that the nutritional value of these fruits can be maximized, so that the body can obtain more nutrients.

It is very likely that pesticides will enter the apple, but there is no need to worry at all, as long as high-efficiency, low-toxicity and low-residue pesticides are used, there is little impact on the human body.

Of course not, these pesticides do not get into the inside of the apples because they are bagged when they are sprayed.

No, pesticides will only stay on the outside of the apple to repel the pest.

Of course it is, so that there are no insect holes, and there will be no more insect bites, just wash it.

Yes, it's generally like this, pesticides, pesticides can make some insects, so as not to eat our apples. The amount of output can be more, but this will also cause some damage to our body, so be sure to clean the mold when you buy apples.

It is definitely necessary to use pesticides, and if you don't use pesticides, apples will be bitten by other insects very ugly.

Under normal circumstances, the suitable temperature for pesticides is 20-30, and the minimum temperature does not exceed 32. Before ten o'clock in the morning, after three o'clock in the battle, the spraying force was calm. Some pesticides, such as stone sulfur mixture, dimethoate, etc., are harmful to pests and diseases at low temperatures, and the consequences are serious.

But most of the pesticides are sprayed in the case of too dry weather and too high temperature, due to the high temperature, the water evaporates quickly, the pesticide concentration is easy to increase, and the concentration of the fruit tree is easy to increase, and the temperature of the fruit tree is too high, which is easy to cause pesticide damage. In general, listen to the weather forecast before spraying pesticides. If there is rain on the day, it can not be sprayed, especially before the rainy season, sprayed copper ions before spraying, and after rainfall, copper ions are concentrated, and pesticide damage will occur.

Golden apples use Bordeaux liquid during the dry season, which tends to produce a large number of rust spots every year. <>

Some pesticides are mixed with sprays, but they should not be mixed, such as sulfur mixtures and Bordeaux solutions, which will increase water-soluble copper, and spray on fruit trees is most likely to cause pesticide damage. Within 7-10 days after spraying the stone sulfur mixture, the Bordeaux liquid can be sprayed first, and the use of stone sulfur sprayed within 20-30 days after spraying the Bordeaux liquid is prohibited. The liquid medicine should not be too much, nor should it be suitable for antibacterial special and fumeishuang, and it should also be used when mixed with inorganic phosphorus pesticides.

Natural enemies are more sensitive to the reaction of pesticides, so they should be used as little or as little as possible to protect natural enemies and maintain the ecological balance in the field. <

The weed-sensitive period is sensitive to herbicides for weeds growing on seeds, and the seedling and seedling stages are sensitive to herbicides, so this period is often the best time for herbicides. When using broad-spectrum herbicides, the pesticides should be applied under the condition that the growth period of lush weeds is relatively sensitive, and the weeding effect is obvious and the validity period is long. Be careful with safety spacing.

In accordance with the standards for the safe use of pesticides, apply pesticides within the safety interval to avoid excessive pesticide residues and adverse consequences. <

First of all, it is necessary to pay attention to the appropriate time, when using pesticides, we must pay attention to the rotation of a variety of pesticides, pay attention to the composition of pesticides, should pay attention to the concentration of pesticides, and then use pesticides, we must protect personal life safety, you can also choose liquid spray pesticides.

Generally speaking, pesticides should be sprayed on fruit trees before there are pests and diseases, and spraying should be carried out regularly, and they can be sprayed once every half a month, which can improve the disease resistance of fruit trees.

It is necessary to find the right pesticide for spraying, be sure to prepare in advance, match it according to the appropriate proportion, pay attention to safety, need to take protective measures, wear gloves, glasses, and wear a mask.

These pesticides should be added to water in a certain proportion, and then poured into a large kettle and sprayed on the fruit trees, which is also relatively common and beneficial to the growth of fruit trees.

Apples have a skin, and the probability of pesticides entering apples is not large, and the pesticide content of apples is not high compared to other fruits.

I think it's going to go into Apple to a certain extent; Because apples absorb something, but there is no need to worry, and there is almost no effect on humans.

Pesticides do not enter the inside of apples, because these pesticides are mainly used to control insects or weeds, and apples are protected by the peel.

In recent years, the wrong use of pesticides on fruit trees has not only caused some pollution to the orchard environment, but also brought many troubles to fruit farmers. So what are the effects of pesticides on fruit trees?

Immediate impact

The direct effect of pesticides on fruit trees comes from the fact that after the use of pesticides, part of them penetrate into the tissues and are transported in the plants, causing different degrees of pesticide damage. Minor pesticide hazards can affect the normal growth of fruit trees, resulting in yield loss and severe fruit tree death. Pesticide poisoning can affect the normal physiological function of a person and even endanger life.

Acute pesticide damage can cause spots, yellowing, loss of green, wilting, leaf rolling, leaf fall, fruit drop, etc., which generally occur quickly and the symptoms are obvious.

Chronic critical effects of pesticides can impair photosynthesis.

Delay the formation of flower buds, delay the ripening of fruits, deteriorate taste and color, and even lead to the death of fruit trees. Symptoms appear only for dozens of days after application, and the symptoms are not obvious.

Indirect impacts

The indirect effects are mainly pesticides entering the orchard soil through a variety of ways, killing soil microorganisms, affecting soil maturity and permeability, destroying soil structure and soil fertility, causing soil compaction, affecting the growth and development of fruit trees, and reducing fruit quality. Although the biggest ecological effect of pesticides is their impact on natural enemies, they also cause damage unknowingly.

So how to use pesticides correctly?

First of all, there are a few things to masterPesticide common sense。The physicochemical properties of these pesticides are most closely related to fruit trees. Generally speaking, small molecule water-soluble inorganic agents are the most likely to cause drug harm, so drugs with weak water solubility are safer.

WP is the next best option, while milk powder and granules are relatively safe.

In the process of spraying pesticides, it is necessary to pay attention:Alternate use of different agentsBecause due to the influence of various reasons in the production process, fruit farmers will habitually increase the use of pesticides, and unreasonable increase in the amount will cause unnecessary damage to fruit trees.

Spraying pesticides should be followedStandard operating mode, including the selection of a sprayer with a high degree of atomization, carefully spraying on the surface of the blade and the back of the blade, and not repeating the spraying. Only by doing it correctly can we ensure the effectiveness of spraying pesticides.

In order to make the environment of the orchard better and the profits of the fruit growers better, the correct use of pesticides is indispensable.

It has a particularly important impact, which can improve the normal growth of fruit trees, increase the yield of fruits, prevent pests and diseases, achieve the effect of insecticide, and ensure the quality of agricultural products; Don't use pesticides when it's windy, rainy, or snowy.

The impact on fruit trees is very large, after all, pesticides will have a certain amount of destructiveness, and will also limit the growth of fruit trees, we must pay attention to dilution when using pesticides, and then should be modulated in accordance with the relevant proportions, so as to reduce the damage.

It is true that pesticides must be used to prevent pests and diseases during the growth of fruit trees, and pesticides are added to dilute the sprayed roots with water.

If it is a fruit with skin, it will not be, and pesticides will not be used too much.

Yes, so spraying pesticides should be done professionally and in moderation.

Generally speaking, this is not the case for them.

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Precautions for apple tree planting.

1) Disease resistance of fruit trees. Strengthening the management and application of fertilizer and water and enhancing the tree vigor are the most basic measures to prevent and control diseases.

2) Transform the closed garden. No matter what kind of tree shape is used, it must achieve the goal and requirements of "smooth between rows, no handover of branches, ventilation and light, and convenient operation".

3) Cleaning must be done well. The diseased and insect branches on the fruit trees are cut off, and the low-carbon and source-saving planting technology of the apple orchard and the ground leaf litter are cleaned out of the orchard or destroyed in a centralized manner to eliminate the source of overwintering pests and diseases that fall on the fallen leaves or branches.

Prevention and control of spotted defoliation disease from late May to early June, spray 1 time in 10-15 days, depending on the weather, spray 4-5 times according to the amount of rain. The more effective agents include Dasheng M-45, polyantimycin, etc.

March: (dormant period, bud germination period) spray the whole garden with insecticides and fungicides before germinationApril: (flowering period) Spray the whole garden with insecticides and fungicides three days before floweringMay:

Young fruit stage) 7 10 days after flowering (80% of the flowers fall off) June: (fruit expansion period) spray Bordeaux liquid immediately in mid-June after bagging, early July to the end of August: the number of doses depends on the weather conditions, Bordeaux liquid and other fungicides are used alternately.

September: (late fruit expansion to before bag picking) Hit the insecticide.

Insecticides are most commonly used in the larval stage, protective fungicides are used before the onset of the disease, and eradicative fungicides are best used in the early stages of the disease.

Pesticides can be used to kill insects, fungi and other organisms that harm crop growth. The earliest pesticides used were DDT, hexahexah, etc.[2], which can eliminate pests in large quantities. However, they have good stability, can survive in the environment for a long time, and continue to accumulate in animals, plants and humans, so they are eliminated.

Later, organophosphorus pesticides, such as dichlorvos, were used instead of the original pesticides. However, they contain phosphorus, which is prone to eutrophication of aquatic organisms. In recent years, a number of high-efficiency and low-toxicity pesticides have appeared, and now people have found pesticides with specificity, that is, hormone pesticides.

Preventive pesticides are used according to the growth of the fruit tree; Pests and diseases should be used as early as possible during the onset of the disease.

Generally, fruit trees will have a corresponding prevention and control calendar. It is very clear what period to take what medicine.