Is it good to spray fruit trees in the morning or in the afternoon?

If you want to fight herbs, it is recommended to do it in the afternoon. First of all, it is said that the noon of the high temperature must not be sprayed, the high temperature will make the medicine volatilize quickly, can not play the effect of prevention and control, and there will be symptoms such as poisoning. As for whether it is good in the morning or in the afternoon, I don't think there is an accurate answer, and it also depends on the seasonal change and the type of medicine.

In winter and spring, it is generally chosen to start spraying after 2 p.m. Especially for greenhouse planting, because the temperature in the shed is low, and it is also the peak period of photosynthesis for crops, if you choose to spray in the morning, the temperature of the shed will be reduced, and it will also affect photosynthesis, which is not conducive to crop growth.

In the summer, you can choose to do it before 10 a.m. or after 4 p.m., so that the agent can achieve the desired effect and the risk of poisoning is also lower.

The best time to spray fruit trees is 8-10 a.m. or 4-6 p.m. Due to the rapid volatilization of the drug at noon, it is easy to cause poisoning in humans and animals, and the effect is not good.

8-10 am and 5-7 pm are optimal. Because the temperature is too high during the day, if you spray pesticides, the fruit trees may be damaged by pesticides, and there is no insecticidal effect.

In winter and spring, it is generally chosen to start spraying after 2 p.m., especially for greenhouse planting, because the temperature in the shed is low, and it is also the time when the crops enter photosynthesis.

During the peak period, if you choose to spray in the morning, it will reduce the temperature of the shed, and it will also affect photosynthesis, which is not conducive to crop growth. In summer and autumn, the spraying of pesticides is generally controlled between 7 a.m. and 10 a.m., or between 4 p.m. and 7 p.m., avoiding the spraying of pesticides at noon high temperatures, the activity of pathogens and pests decreases at noon, and pests are sheltered in the shade.

The reason why spraying pesticides in the morning is that there will be some dew on the plants after waking up in the morning, and after a night of low temperatures, after the sun comes out, the water evaporating from the ground may also condense onto the leaves and become small water droplets. After choosing the time, it depends on the wind of the day, we generally choose to spray crops when the wind is small, so when spraying crops, we should not only look at the season to choose the time of spraying, but also look at the weather conditions of the day, only choose the right time and the right weather.

Just like this spraying time, crop varieties are diverse, cultivation methods are also different, spraying time is also different, on the whole, the more general spraying time: is a sunny day before 10 o'clock in the morning and after 4 pm, to avoid the noon high temperature time, to avoid the morning and evening dew time. In the afternoon, there is no dew at all, and the water on the upper part of the crop has also flowed back to the rhizome, so the pesticide can ensure the adsorption and penetration of the drug, and the effect can be more durable.

Especially at noon on a sunny day, the temperature is the highest of the day, and the volatilization of pesticides is also the largest, which is very bad for the human body. Even on cloudy days.

I don't recommend anyone doing that at noon. It is important to know that when controlling weeds, insects or diseases, the most suitable activity temperature is generally about 20 30, so that when the temperature and environment are suitable, spraying will have the best control effect, which is more conducive to the daily management of crops.

Of course, it is good to play in the morning. Because the temperature in the morning is not too high, and pests and diseases are very active, the effect of spraying in the morning is very good.

Generally, it is better to play in the afternoon, because there is more sun in the morning, in fact, the application of pesticides is likely to affect the growth of this crop.

In fact, it is best to play in the morning, and then in the afternoon, the sun is very sufficient at noon, and the medicine in the afternoon can also be well absorbed at this time to achieve a good effect?

In the afternoon, because the temperature is low in the afternoon, it is easy to absorb, and the transpiration at noon is not conducive to the absorption of plants.

It must be better to spray pesticides in the morning, when the sun has not yet come out, and the absorption rate of pesticides is relatively high.

The effect is good in the afternoon, because there will be dew in the morning, and the medicinal properties cannot be brought into play.

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.

1. It is better to spray on cloudy days. Strictly speaking, pesticides can be applied on sunny and cloudy days, but the crops are easier to absorb and are not easy to produce pesticide damage, and they can be applied all day. On sunny days, the application is generally carried out before 10 a.m. and after 4 p.m., and the leaf surface and leaf dorsal surface of the plant are sprayed during application.

2. If the pesticide is applied in the case of cloudy days, it must be paid attention to, because the growth of plants at this stage is easy to be inhibited, so in the selection of pesticides, do not use or be cautious to use the word "azole" and the word "alcohol", because this kind of agent can inhibit the growth of plants.

The main reason for the impact of this drug on the next day is the formula of the drug, because now the drug is basically required to be compounded with a variety of drugs, such as some fungal drugs, most of them will be invalid after a few hours, I contract a farm of 120 acres, a variety of different fruit trees, I prepare a good pesticide for the fruit tree, often encounter unstable weather, the pesticide is used the next day, the effect is the same as that used at that time, because the prepared potion can be kept for three days without invalidation.

The pesticides of the past are different from the current ones, they are all highly efficient and highly toxic pesticides, and there are many varieties. There are i605, DDT, i059, 203, ammonium phosphate, dimethoate, etc., in order to be safe and pollution-free, these drugs are now eliminated. The original drug is prepared by the original drug according to a certain ratio, and the original drug is the mother liquor of the synthetic pesticide preparation, most of which have a content of more than 95%.

For example, we need to produce 5% lice carite urea suspension, and we need to add 98% to one ton of preparation.

We spray fruit trees, generally mainly bactericide and insecticide, corresponding to fungicides and insecticides, which are the most commonly used, and then we occasionally use some growth regulators, in addition, when playing fungicides and insecticides, if you prepare the medicine in the morning, it will generally be sprayed after the preparation, that is to say, you have already beaten the medicine, and it rains, and the instructions of the drug will write that you need to re-spray in case of rain, and you still have to re-spray the next day.

In fact, this principle is very simple. People with a little common sense, let alone professionals. All chemical drugs, especially the use of liquid chemical drugs, once the lid is opened, the temperature, air, and medicinal properties will be emitted, and the conventional spraying is inseparable from two drugs, insecticides and fungicides, under normal circumstances, these two drugs need to be used together, so think about it, the two drugs need to be dissolved in water at the same time, and they will work about 2 hours after spraying.

Such a process must not have much effect, and there must be a problem with this medicine, so it should be re-put and re-injected with the effective fruit.

The effect of the medicine is useful because it is absorbed by the fruit trees and will not be washed away even if it rains, so the effect will continue to work.

There are still some pesticides, but the effect is not particularly obvious, because many pesticides have been washed away after the rain.

It has a medicinal effect, but the medicinal effect is not very obvious, and after a day, a lot of medicinal effects are lost, so many crops are now dispensed and hit first.

I think that if the medicine for beating fruit trees in the morning is rainy, and then the next day, then its medicinal effect will be greatly weakened, and we should reconfigure this medicine.

There are no more, after all, the pesticides have been washed away after heavy rain.