Will the herbicide be effective after a few hours and then it rains?

The herbicide is played for a few hours, and then it rains, the effect is not very good, but the weeder has a certain effect on the damage of the planting soil, and the rain washes into the soil, which will cause some damage to the soil quality. After several hours of rain washing, the herbicide did not work in the crop.

It rained after 4 hours of herbicide, and the medicine still had an effect, as long as the grass absorbed the medicine, it was not afraid of rain.

The herbicide has been applied, and it still has an effect after a few hours of rain, and it will not affect the efficacy of the herbicide.

After three or four hours, you don't have to be afraid of rain. The effect is very good.

No rain for four hours is effective.

After being washed by the rain, it has no effect at all.

8 hours

The rain after the post-seedling herbicide is more than 8 hours does not affect, and it is basically absorbed by the weeds after spraying, which has played a weedicidal effect, and the rain will not have an impact on the post-seedling herbicide. The post-seedling herbicide has not affected the rain for more than 8 hours, and the herbicide has been fully in contact with the weeds or absorbed by the weeds, which has played a role in inhibiting the physiological and biochemical metabolism of weeds or killing part of the weed tissues, and has played a grass-killing effect, and the rain will not have an impact on the post-seedling herbicides.

While most post-emergence herbicides are basically systemic herbicides, the absorption time is very short, and after 2-3 hours, the sprayed herbicide can obtain most of the absorption. Therefore, generally rain will not have any effect on post-emergence herbicides after the effect is absorbed.

Generally, there is no rain within 6 hours after the herbicide is not re-sprayed, the rainfall is divided into heavy rain, heavy rain, light rain and foggy rain, light rain and foggy rain and the time is short, it is not necessary to respray, if it is heavy rain, heavy rain and a long time needs to be re-sprayed.

The herbicide was beaten for a few hours, and then it rained, and the effect would definitely be there. But the effect was not so sufficient, and the potion was washed away by the rain.

Generally speaking, rain within an hour has no effect.

1. Generally, herbicides are shot.

If it rains after six hours, it will not affect the efficacy of the drug, and if it rains within six hours after the herbicide, it is recommended to wait one to two weeks later.

Observe the condition of weeds in the field and consider whether respraying is necessary. When respraying, pay attention to controlling and reducing the dosage, or choose a different mechanism of action agent to respray to avoid pesticide damage and ensure the prevention effect.

2. If the rainfall reaches moderate rain and above, it will cause too much moisture in the plant due to the more soil moisture in the field, which will dilute and reduce the content of the agent absorbed in the plant, and at the same time, too much water will also affect the conduction and transportation of the agent in the body, so the agent will have a certain impact on the weed control effect. This situation requires re-spraying to control weeds.

3. If the rainfall is too long and the light is insufficient, it will affect the conduction and transportation of the agent in the weed, and have a great impact on the mechanism of action of the agent. This situation requires re-spraying.

Five hours after the herbicide was applied, it rained, and it didn't matter.

The size and duration of rainfall, if the rainfall is small and the duration is short, in the form of showers, in this case, the herbicide spray is sprayed for a few hours, the impact of rainfall is relatively small, on the contrary, if it is moderate rain and above rainfall, the duration of several hours after the effect of the herbicide is relatively large.

In general, it is not recommended to spray herbicides for the second time, especially after the first spray after the year, and then spray the second time, which can easily lead to herbicide damage in wheat.

There are many ingredients of herbicides, different herbicide ingredients, the effect of the effect itself is also different, if farmers in the purchase of herbicides, have paid attention to the instructions behind the packaging will find that some say that it will take effect after 6 hours, some will take effect after 12 hours, and some will take effect within at least 24 hours, which is caused by different herbicide ingredients.

It works, but the effect on crops is not very large, and generally the herbicide can only fully exert its effective effect two to three hours after spraying.

Herbicides are also known as herbicides. A chemical agent that can kill weeds or harmful plants without affecting the normal growth of crops. It can be used to control weeds in farmland or to kill weeds or shrubs on non-agricultural land.

According to its action characteristics, it can be divided into selective herbicides and biocidal herbicides. Selective herbicides are those that selectively kill certain species of plants and are harmless to others within a range of doses and concentrations.

The effective time of herbicides is not the same, most of the herbicides are absorbed by the grass within five hours, and the rain has little effect, but try to look at the weather forecast when applying herbicides in the future.

About ten hours later.

Herbicides are chemicals that kill weeds or harmful plants without affecting the normal growth of crops. It can be used to control weeds in farmland or to kill weeds or shrubs on non-agricultural land.

According to its action characteristics, it can be divided into selective herbicides and biocidal herbicides, selective herbicides refer to the use of a certain dose and concentration range, can selectively kill some kinds of plants, and other kinds of plants are harmless.

Precautions: The rational use of herbicides is conducive to improving the weeding effect, ensuring the safety of crops and reducing environmental pollution. Here's how:

1) Choose the right herbicide. Each herbicide has different activity, mechanism of action and target control. According to these characteristics, the selection of appropriate herbicides is the fundamental guarantee to improve the effect of herbicides, such as fluoralin mainly inhibits weed young roots and shoots, and is ineffective against large grasses, so fluorinol is not suitable for application after weed emergence.

2) Understand the types and characteristics of the target for removal. There are many species of weeds in the field, with different morphological differences and characteristics, and different susceptibility to herbicides, even if the same weed has obvious differences in pesticide resistance at different growth stages. If monocotyledonous weeds are dominant, herbicides with good effect on monocotyledonous weeds should be selected.

3) Choose herbicides that are safe for crops. After the application of herbicides, it is inevitable to come into contact with crops, sometimes it can directly cause pesticide damage to crops, some drift to neighboring crops to cause pesticide damage, and some herbicides have a long duration in the soil, causing pesticide damage to crops, and the above pesticide damage is directly caused, and it is obviously manifested in a short period of time, which is called acute pesticide damage. After some herbicides enter the plant body, they have an adverse effect on a certain physiological process of the crop, which is called chronic pesticide damage, such as the impact on crop quality and storability.

The above drug hazards should be fully noted.

4) The characteristics and use of herbicide are understood. prevent indiscriminate, misuse and misuse of herbicides; It is necessary to grasp the dosage of herbicides and spray evenly; Choose the right period of use; According to the growth of crops and weeds, change the use of herbicides, such as strip application, mixed application, etc.; It is necessary to achieve the principle of experimenting, demonstrating, and then popularizing, and gradually improve and improve it in practice.

In practice, some herbicides, such as sulfafen, have a weeding effect of 99% when mechanically sprayed in showers of light rain, especially the control effect of difficult weeds, and the control effect is the best, which is significantly better than that of high-volume sulfafen + urea, and soybean has no pesticide damage.

The Gram Without a Trace series takes four hours. Glyphosate series is best twelve hours.

The stems and leaves are generally treated for 6-10 hours and can be absorbed and utilized.

It can be done after 8 hours. Paraquat is OK after 4 hours.

It is best to go to the medicine in the morning and afternoon, and then blow up the sun for seven or eight hours.

Soon after the herbicide, there was a light rain, the kind of shower that was dripping and stopped for a while, and it did not need to be re-sprayed, and this light rain had little effect on the efficacy of the herbicide. If it is a heavy rain, a heavy rain, a very sudden kind, and the duration is a little long, then basically the herbicide solution is washed away by the rain, consider respraying.

If the light rain lasts for a few hours or even longer, even if the rain is not heavy, but lasts that long, it needs to be resprayed. The situation of heavy rain and heavy rain is more serious than light rain, which lasts for several hours needless to say, and does not exert its medicinal effect, and if it lasts for a short time, dozens of minutes, but in the case of heavy rain, it is decided whether to respray according to whether there is precipitation in the follow-up and whether there is water in the field.

After more than three hours of herbicide, it rained, and if the grass is not finished, the grass should not be beaten again. If there is a lot of grass, it will be beaten again in five or six days.

Don't hit it hard, just dry the dew, but it will definitely work well when there is no big sun, and the grass will slowly die.

No need to hit hard, three hours of herbicide action is enough to make the grass die.

After spraying the herbicide for 4 hours, it rains fine, at this time the herbicide has been absorbed by the weeds, and slowly begins to exert the herbicide's weeding effect, and the rain will not affect the herbicide's efficacy.

When using herbicides, we should pay attention to the environment and the environment of spraying, and choose the weather when spraying without wind and rain, the wind may cause harm to the crops downwind, and the rain will reduce the efficacy or cause pesticide damage to the crops.

Precautions for herbicide application.

When using herbicides, it is necessary to find out the types of weeds and choose the appropriate herbicide varieties according to the types of weeds. When applying pesticides, it is necessary to control the concentration of drugs, and apply them in strict accordance with the instructions, as large doses can easily lead to drug damage.

When spraying drugs, it is necessary to spray evenly and thoughtfully, if the spraying is uneven, it will not only affect the efficacy, but also be prone to pesticide damage, which will affect the growth of crops.

Theoretically, it is 15 days, but practice has proved that rain immediately after the drug has the best effect; However, if it rains within 15 days, it will still have a medicinal effect, but the effect is not as obvious as the rain immediately.

Herbicide spraying should be in high temperature, dry, windless, sunny weather, 10 a.m. to 4 p.m. Experiments have shown that spraying herbicides at wind speeds of more than 8-10 m/s can reduce the efficacy of herbicides by about 5%. In case of rain 6 hours after application, the efficacy of the drug will be reduced, and it should be properly sprayed.

corn herbicide).

The soil should be kept moist before and after spraying to improve the efficacy. After the application of pesticides, pay attention to drainage if it rains to avoid pesticide damage.

Summary. Hello, heavy rain two days after the herbicide will affect the effect Oh dear, the herbicide in the farmland, the effect of the herbicide needs a few days to fully exert itself, such as the next day rain, the herbicide may be carried away by the rain, and flow to the low-lying land, after accumulating to a certain amount, it will also have an impact on the crops in the low-lying land. If it rains the next day after using the herbicide, it is recommended to wait until the day is clear, and then spray again, but also pay attention to the spraying time, not in the morning, at this time there is dew on the crop, the herbicide may flow to the ground or evaporate with the dew, and not in the sun, the crop will avoid water evaporation and close the stomata, the herbicide will be difficult to enter the crop, and it will not be effective.

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Hello, heavy rain two days after the herbicide will affect the effect Oh dear, the herbicide in the farmland, the effect of the herbicide needs a few days to fully exert itself, such as the next day rain, the herbicide may be carried away by the rain, and flow to the low-lying land, after accumulating to a certain amount, it will also have an impact on the crops in the low-lying land. If it rains the next day after using the herbicide, it is recommended to wait until the day is clear, and then spray again, but also pay attention to the spraying time, not in the morning, at this time there is dew on the crop, the herbicide may flow to the ground or evaporate with the dew, and not in the sun, the crop will avoid water evaporation and close the stomata, the herbicide will be difficult to enter the crop, and it will not be effective. Do you have any questions that I would like to answer for you?

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