When spraying crops, is it better to spray in the morning or in the afternoon?

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.

Crops can be sprayed in the morning and afternoon。As long as it's not noon. The application time of pesticides is different in different seasons and different growth stages of different crops.

For example, cucumbers in greenhouses are better sprayed on sunny days after 9:00 a.m. and 4:00 p.m. in the hot season because 9:00 a.m

After 00, the dew is dry, the temperature is not too high, and pests and diseases are active, so the spraying effect is best at this time. After 4 p.m., there is frequent activity of pests at night. Spraying pesticides at this time can effectively kill pests.

Generally, on sunny days in summer and autumn, vegetable growers do not spray pesticides at noon. Due to the high temperature in summer, the high temperature at noon is easy to promote the decomposition of the drug, increase the volatilization of water in the liquid medicine, and easily cause drug damage. At the same time, when the weather is hot, the chemical activity of pesticides becomes stronger and the efficacy decreases, but the toxicity of pesticides increases.

Especially when spraying emulsifiable concentrate and various herbicides at high temperatures, it can easily lead to poisoning of pesticide applicators.

In winter and spring, it is generally between 2:30 p.m. and 3:30 p.m

In winter and spring, the temperature in the shed is very low. Spraying at noon will lower the temperature and affect photosynthesis, so spraying in the morning is not appropriate. In addition, in hot weather, crops grow vigorously, the leaves have wide stomata, and phytotoxicity can easily penetrate into the crop, which may cause damage to the crop.

At the same time, high temperatures and the enhancement of the chemical action of the chemical solution may lead to poisoning of the pesticide appliers.

I think it's better to take it in the morning, it may be more conducive to absorption, and it is conducive to the effect of that medicine.

Generally speaking, it is better to spray crops in the morning, because they can be fully affected by sunlight.

I don't think it affects you, as long as the weather doesn't rain.

I don't think it really matters, as long as it's done regularly.

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.

The best spraying time is after six o'clock in the evening, because at this time spraying, the temperature is lower after application, the humidity is larger, the liquid medicine stays on the weed leaf surface for a longer time, the weeds can fully absorb the herbicide components, ensure the weeding effect, and the evening medication can also significantly improve the safety of corn seedlings, and it is not easy to cause pesticide damage.

The best time of the day to apply pesticides, many medicine sellers or agricultural technicians must tell you, is before 10 o'clock in the morning and after 4 o'clock in the evening.

That's fine, but the problem is that the dew doesn't go down until seven or eight o'clock in the morning, and it comes up again at six or seven o'clock in the evening. In just a few hours, how can a farmer who has been planting land for ten days or eight days? How long does it take to get a single dose?

How do I determine the best time to apply pesticides? It depends on what spraying tools are used, what kind of medicine is used, and what period the crops are in. The best time to apply the medicine is always a few hours, but it is not enough!

Let's talk about spraying tools first:

1 Plant protection aircraft.

Plant protection aircraft operate efficiently, quickly and with long working hours. In the process of operation, people are safer and more convenient. The airplane flies over the seedlings, people do not stick to the medicine, and the medicine is evenly dispersed on each seedling.

The plant protection machine needs to avoid sun exposure, because the fog droplets it sprays are small, and a large amount of volatilization will be caused by the sun. In this way, we use spraying pumps and sprayers to spray differently, the lowest distance from the seedlings is meters, and people use spraying pumps and sprayers to spray, and the height of the seedlings is less than the meter.

The plant protection machine sprays the pesticide with downward pressure airflow, and the dew on the seedlings will be blown off by the wind and then dropped. Therefore, except for 11 a.m. to p.m., the plant protection machine can be played the rest of the time.

2 Spray pumps and sprayers.

The best time to spray the pump and sprayer is indeed from 7 to 10 a.m. and from 7 p.m. to 7 p.m. During this period, the reason why the medicine is good is not that the rest of the time is not good, but when there is dew, the person will rub off the medicine, resulting in the medicine is not good, and there is no problem in the rest of the place.

Farmers use a lot of medicine and too little water. A little dew drops on the seedlings not only does not reduce the efficacy, but the effect is better than when there is none.

This is what farmers often struggle with, whether it is better to get up early in the morning with dew to play glyphosate, or not to use glyphosate without dew. Actually, both methods work, I've fought both. However, there is dew to hit, and the weeds die faster.

Some farmers say that it is not easy to use after beating, but it is actually a problem of water, and try to use water from the mouth of the pond that has been dried for two days.

Let's talk about the period of the crops:

When the rice is pollinated, the spraying must be completed before 8 a.m. and started after 4 p.m. The rest of the time is sprayed, and the loss of rice is very large, which seriously affects the yield.

Finally, the use of potions:

Spraying insect medicine can be sprayed at other times throughout the day, except for high temperature evaporation and personnel poisoning. Try to buy stomach killer medicine for spraying insects, and you need to pay attention to the entry and exit time of insects for the contact killing type.

Fungicides and herbicides, we avoid high temperatures, avoid rain, and spray all day. Spray them, there are no contraindications. As long as you pay attention to the ratio of liquid medicine, you can't exclude each other.

As long as it is not the flowering and pollination period of crops, throw away the high temperature and sun, and apply pesticides at any time of the day. Farmers are not as complicated as everyone thinks.

A good choice for pesticides, the afternoon of the day is the best, in the afternoon, the weather is more refreshing, and can make our pesticides better absorbed, but also because of the high temperature to destroy the molecular structure of pesticides.

In the summer, it is at 9 a.m. and 4 p.m., and in the winter at 2 to 3 p.m., so that the effect of pesticides is at its best.

I think it's in the morning, because there is more dew in the morning, and it is better to use pesticides.

Prevention of diseases, insects, weeds during fruit trees, fields or vegetable implants is very important, and medications are common. Many friends say that with the same **, the final prevention effect is great, mainly because there are no skills in skills. Over the years, in order to improve the efficacy, farmers have also thought of a large number of methods, such as adding silicones to pesticides, improving permeability and urea in herbicides, increasing absorption capacity, and so on.

Lao Wu, a farmer, said: "When planting deeper crops, I have to take herbicides. I usually take my medication at six or seven in the morning.

On the one hand, the medicine should choose sunny weather, the temperature is the lowest in the morning, there is no heat stroke, the artificial medicine will relax, on the other hand, in the morning, the vitality of the weeds is relatively weak. This time is to take medication, which is more beneficial for weeds. “

Another farmer said: "I used to play medicine at noon, and the temperature was very high, which was good for absorbing liquids, but it didn't work well. After 5 p.m., I will carry out medicines, fungicides, insecticides, just like these, like some pests have a habit of a day, in the afternoon, the medicine is volatile, then the anti-insect effect will be better.

Judging by the descriptions of these two peasants, there is also a controversy. First of all, we can be sure that we must avoid periods of high temperatures, high temperatures, high volatility, good volatility, healthy people are healthy, and after spraying, evaporating liquid liquids. The liquid remains on the blade, and the plant absorbs the difference.

Therefore, it is best to choose two time slots in the morning or afternoon.

When spraying in the morning**, you must look at the blades for dew. If the dew does not dry, the sputum will be diluted after dilution and the original effect will not be achieved. Before ten o'clock, the dew dries a little, and then the spray is better.

When making medicine in the afternoon, this is usually five or six o'clock. For example, some underground pests are harmful at night. After playing with medicine in the afternoon, the effect is even better.

There is also a good time to make medicines to improve the efficacy. If flying to prevent drugs, the time requirements for drugs are not high, and the control is generally better. However, when artificial medicine, try to choose sunny days, after 10 o'clock in the morning and after 5 o'clock, which twice, avoid high temperature cycles, which are more conducive to the absorption of liquids.

Including spray leaf fertilizers, plant growth regulators, these are all the same.

I think it should be in the morning, if you take the medicine, there will be sunshine all day long, and it may absorb a little faster.

It should be applied in the morning to be more effective. The effect is more pronounced in the morning than in the afternoon, and it is also better absorbed to a certain extent.

Generally, in the afternoon or morning, try not to spray when the sun is hot, it will burn the plant.

It is best to be around 6:00 in the morning for 7 years is the best effect, because at this time the weather is neither hot nor cold, and it will not cause heat stroke in people, and the vitality of weeds will indeed be weaker.

In the afternoon, because there is dew on the plants in the morning, the medicine and the medicine fall with the dew, and in the afternoon, the dew dissipates, and the medicine can be well absorbed.

The use of pesticides is an important means of agricultural production at present, and it has also made great contributions to our country's agricultural production and ensuring a bumper grain harvest. In view of the current agricultural production is still in the scattered stage, the use of pesticides is more chaotic, the use of pesticide technology and use methods need to be improved, the most critical of which is the quality of spraying pesticides, the time of spraying is the most important, the same pesticide is used in different time periods, the effect is very different. When is the best time to spray pesticides, many farmers do not know very well, the author will share this problem with the majority of farmers to help you improve the use of pesticides.

The best time to spray

The best time of day to spray in the summer high temperature season is after the dew has dried in the morning and before 10 o'clock and after 4 o'clock in the afternoon. Because the transpiration of the leaves of the crop is weakened at this time, the respiratory stomata of the leaves are stretched and opened, which is conducive to the absorption of the liquid medicine and the improvement of the use effect of the agent. The cool season of spring and autumn should be sprayed after 9 a.m. and before 2 p.m.

At this time, spraying is conducive to the exertion and penetration of the efficacy, and improves the penetration effect of the agent. At this time, the outdoor temperature is kept at about 15 degrees, which is conducive to the absorption of the liquid.

In the cold season of winter and spring, we must choose to spray when the temperature rises and the climate is warm. At this time, the timing of spraying is not too much, mainly in the spring of the fruit tree garden, the choice of pesticides is mainly some agents with good systemic properties.

The best time to spray different varieties

1. The spraying time of corn herbicide is also different, and the application time of closed herbicide is most suitable for spraying around 5-6 o'clock in the evening on a sunny or cloudy day, because spraying can reduce the volatilization of the liquid at this time, and after a night of penetration and absorption, it can improve the killing effect of weeds and grass buds. If you choose to spray after rain or in dewy weather, the effect will be even better. The spraying time of post-emergence herbicide should also be selected before 10 o'clock in the morning, spraying after 4 o'clock in the afternoon, and the outdoor temperature should be kept at 16 -23 at this time, the temperature at this time is conducive to the killing of weeds, and the speed of weeding is improved.