How many hours does it take for fruit trees to be absorbed? When was the first spray for fruit trees

First of all, from the point of view of the temperature of spraying, it must be carried out in the morning and afternoon (or even evening), these two time periods are the lowest temperature during the day, so the low temperature also helps the fruit trees to "absorb at an appropriate rate" after spraying, generally 3 to 4 hours is the most normal and appropriate.

If the temperature is high, such as near noon at 11 to 12 o'clock, noon at 2 to 3 o'clock, spraying, which in the case of a sunny day, more than 1 hour or so will be dried, passively absorbed, so that not only the effect is not good, but also will form a "pesticide damage", which is not conducive to the growth of apple trees and fruits in this time period, so we should first avoid the high temperature time period of sunny days to spray, grasp the right time and temperature.

Fruit trees can be absorbed in four hours, so when spraying, it is best to choose the evening, so that the absorption effect is better.

Summary: From the point of view of the absorption effect of apple tree spraying, it can be basically absorbed after 4 hours, and it must be sprayed at the right temperature, right concentration and right collocation in the appropriate spraying time period, so that it will be well absorbed.

Generally, it can be basically absorbed after 4 hours, and it must be sprayed at the right temperature, right concentration, and right combination in the right spraying time period, so that it will be well absorbed.

The fruit tree will not be affected by the rain after 4 hours of spraying, and its medicinal properties have almost been volatilized after 4 hours, and there is no need to reapply after the rain. Fruit trees are suitable for fruit-preserving agents during the flowering period, and pesticides to prevent pests and diseases within 7-10 days after the flowers of the plant wither, and spray Zhuangguodiling agents during the fruit expansion period. Pay attention to the concentration when spraying, especially in the summer to the fruit trees, the concentration of the liquid medicine should not be too high, so as not to cause pesticide damage.

Look at the variety, temperature, weather, pesticide application time, what to spray and other factors, generally 2-4 hours, Jiaxing Xincheng Qi gardening.

Before flowering. Before the fruit tree flowering, it is necessary to play an appropriate amount of fruit-preserving drugs, which is conducive to improving the fruit setting rate, and increasing the yield of fruit trees, reducing the fruit drop rate, the type of agent can use growth regulators, which is conducive to promoting the growth of fruits, mainly naphthalene acetic acid, gibberellin, etc., the use concentration should not be too high, in addition to the use of growth regulators, it is necessary to supplement an appropriate amount of trace elements, the main of which is boron, which is conducive to promoting pollen germination, helping fruit trees to complete fertilization, and can be mixed with sugar during the period.

Precautions for spraying fruit trees.

Generally, the suitable temperature of pesticides is 20-30, and the temperature does not exceed 32. It is safer to spray before 10 a.m. and after 3 p.m. Most pesticides are sprayed in the case of too drought and high temperature, and the water evaporates quickly, which is easy to increase the concentration of pesticides and easily cause pesticide damage to fruit trees.

Before spraying, you should listen to and watch the weather forecast in time, and if there is rain on the day, do not spray the fruit trees, so as to avoid the occurrence of pesticide spraying or reducing the efficacy. It is forbidden to spray pesticides on windy days to prevent the liquid medicine from being blown off by the wind.

When spraying pesticides, it is necessary to target and prescribe the right medicine according to the different conditions of fruit tree diseases and insect pests and the actual situation of different susceptibility of various fruit trees to pesticides. For example, stone fruits and kiwifruit fruit trees are very sensitive to dichlorvos and trichlorfon pesticides, and the young tissues of grapes, plums and peaches are very sensitive to multi-dose Bordeaux liquid.

The above content refers to Encyclopedia - Fruit Trees.

Before flowering: Before flowering, fruit trees can be injected with an appropriate amount of naphthalene acetic acid, gibberellin and other fruit-preserving drugs, which is conducive to improving the yield of fruit trees and reducing the fruit drop rate. After the flowers fall:

Within 7-10 days after the flower withers, it can be sprayed with stone sulfur mixture, which is conducive to reducing the incidence of pests and diseases. Fruit expansion period: It can be sprayed once to avoid deformed fruits, and it is also conducive to reducing the occurrence of fruit falling.

Before the fruit tree blooms, it is necessary to take fruit preservation medicine, which can increase the probability of fruit setting, increase the yield of the fruit tree, and reduce the probability of fruit drop. The type of agent can be a growth regulator, which can regulate the growth of the fruit, the main ones are gibberellin, naphthalene acetic acid, etc., and the concentration does not need to be too high. In addition to the use of growth regulators, it is also necessary to supplement trace elements, the most important of which is boron, which can effectively promote the germination of pollen, help to complete fertilization, and can also be mixed with sugar.

In the 7-10 days after the flowers have withered, it is necessary to inject a pesticide to prevent pests and diseases to reduce the possibility of pests and diseases and remove hidden dangers. The specific type of medicine needs to be based on the type of fruit tree, which can be more selective, such as stone sulfur mixture, which has a good effect and is not high in cost.

Precautions for pesticide application for tree control and pest control

1. In the young fruit period, especially when apple trees are sprayed, try to use less or no Bordeaux liquid agent, which is conducive to reducing the incidence of fruit rust.

2. Fruit trees are prone to aphids, red spiders, etc., and the back of the leaves needs to be evenly sprayed when spraying.

3. To prevent and control pests and diseases, if there is rain within 6 hours after each spray, it is necessary to spray again once during the period to enhance the control effect.

After 4 hours of spraying, it rained and the fruit trees were not affected. After 4 hours, their medicinal properties have almost evaporated, and there is no need to replenish them after the rain. It is suitable for spraying fruit preservation drugs during the flowering period of fruit trees, spraying pesticides for the prevention and control of pests and diseases within 7-10 days after the wilting of plant flowers, and spraying strong fruit pesticides during the fruit expansion period.

Pay attention to control the concentration when applying, especially in summer, when applying pesticides to fruit trees, the concentration of the liquid medicine should not be too high, so as not to harm the pesticides. First, it doesn't matter if it rains a few hours after the fruit trees are sprayed. The fruit tree will not be affected if it rains 4 hours after spraying the pesticide, so it does not need to be supplemented, because after 4 hours, its medicinal properties have almost evaporated, and it will not be affected by rain.

Pesticide spraying is suitable for fruit trees in the flowering stage, young fruit stage and strong fruit stage. The spraying time of pesticides should be determined according to the temperature. If the temperature is low on the day, it should be done at noon.

If the temperature is high on the day, it should be done in the morning or afternoon to avoid drug damage. 2. What medicine is good for fruit trees? 1.

In the flowering period of fruit trees, it is advisable to use fruit-preserving drugs to improve the fruit setting rate and the yield of fruit trees in the later stage. Growth regulators such as gibberellin and naphthalene acetic acid can be used for drugs, and the concentration should be appropriately adjusted when used. 2.

Insecticides should be applied within 7-10 days after the flowers have wilted to reduce the impact of pests and diseases. The type of pesticide should be determined according to the variety of fruit trees. 3.

During the fruit expansion stage, you can spray a strong fruit to thicken the fruit pedicle to increase the amount of nutrients transported and prevent fruit drop or deformed fruit in the later stage. Three. Precautions for spraying drugs1

Pesticide concentration: when applying pesticides, pay attention to control the concentration, especially in summer, when applying pesticides to fruit trees, the concentration of pesticide should not be too high, so as not to harm pesticides. 2.

Pesticide application time: pay attention to choose the right time when applying, and pay attention not to apply pesticide at noon in summer, because the temperature at noon is relatively high, so there are fewer pests. Noon application not only does not kill pests, but also volatilizes quickly, so the application time should be before 10 a.m. and after 4 p.m.

3.Do a good job of protective measures: pay attention to protective measures when taking medicine, especially in summer, because the high temperature will make the pores of the human body dilate, and the liquid will contact the human body after volatilization, and then be absorbed by the pores, resulting in poisoning.

1. Temperature: pests and diseases are more active in 20-30 hours, high temperature in summer, spraying before 10 o'clock in the morning or after 4 o'clock in the afternoon; When the temperature is low in spring and autumn, the medicine is sprayed at noon.

2. Fruit tree growth: before the fruit tree blooms, the fruit preservation drug is used to improve the fruit setting rate and increase the yield of the fruit tree; One week after flowering, it is necessary to inject pesticides to prevent pests and diseases to reduce the possibility of pests and diseases; During the period when the fruit is enlarged, you can spray it once, which can make the fruit pedicle thicker and increase the amount of nutrient transport.

Characteristics of pests and diseases: such as the control of whiteflies (fly away as soon as they are touched), spray pesticides in the morning when the dew is not dry; To control flower thrips, spray in the morning when the flowers bloom; Control of leaf thrips, spraying in the evening or at night, etc. Diseases are usually spread by rain, and when preventing and controlling, pesticides can be applied before and after rain, before watering, before cloudy days, and at the beginning of the disease.

Fruit trees can be absorbed in a few hours, generally depending on the variety, temperature, weather, application time, spraying and other factors, generally 2-4 hours. Fruit trees can be absorbed in a few hours, generally depending on the variety, temperature, weather, application time, what to spray and round medicine and other factors, generally 2-4 hours. When we take medicine in our daily life, the temperature is low, so we should take the medicine at noon; In summer, the temperature is high, so it is necessary to apply medicine in the morning and afternoon.

Especially when spraying and adding foliar fertilizer, the temperature is high, and the water on the leaf surface evaporates quickly, which is easy to cause fertilizer damage and pesticide damage to the leaves; When the temperature is low, the water on the leaves evaporates slowly, the water retention time is long, and the absorption of foliar fertilizers and pesticides by the leaves is relatively slow, and the effect is good and there will be no fertilizer damage and pesticide damage.

1 The leaves of plants are the most susceptible organs for absorbing pesticides because of the large surface area of the leaves, the thin epidermal cells of the leaves, and the stomata on the leaves are able to absorb pesticides in the air. 2 In addition, the roots of plants are also important organs for the absorption of pesticides, because the roots can absorb water and nutrients from the soil, and pesticides are usually dissolved in soil water. 3 It is important to note that the fruits and seeds of plants may also absorb pesticides, so it is necessary to control the amount and timing of pesticides when using pesticides to ensure the health and safety of plants.

Pesticides are sprayed on crops, and plants are mainly absorbed through the roots, stems and leaves of plants, and some are absorbed, internalized and conducted; Some act directly on the rhizome and leaves. In other words, there are differences depending on the plant species and the different varieties of pesticides. Therefore, according to the plant variety, pesticide type, pesticide characteristics selection, prevention and control needs, etc., the corresponding pesticide is selected.

Therefore, after the pesticide is applied to the plant, the plant is mainly absorbed through the rhizomes and leaves of the plant.

When sprayed on fruit trees, they are absorbed by the stomata and skin pores on the leaves, branches and fruits.