How long does it take to see results from spraying pesticides? How long does it take for a plant to

In order to get the best effect of spraying pesticides, not only the medicine should be selected correctly, the ratio should be scientific, but also the time of spraying is also particular, many farmers and friends in the prevention and control of crop pests and diseases, do not pay much attention to the time of medication, and even very arbitrary, which will affect the effect of medication. So, how do you master the spraying time? I will introduce it to you today, and I hope it can help you.

Depending on the season, the spraying time is different.

There are also seasonal changes in the time of medication, such as short light hours in winter, low temperature, slow drying after spraying, and less chance of pesticide damage. In winter, the vegetables in the greenhouse can be used in the morning to wait for the dew of the leaves to dry before spraying, and in the afternoon, you can choose to do it before closing the vent. In summer, the temperature is high around noon, the liquid dries quickly, and the drug activity is strong.

Different pests and diseases, spraying time is different.

Different pests and diseases have different invasion times, so there should be differences in spraying time. For example, to control pests, it is necessary to use flexible drugs in combination with the living habits of pests, such as ground tigers.

Thrips and other pests are accustomed to feeding at night, and it is better to choose to spray in the evening; Whiteflies, aphids.

It is mainly eaten in the morning, so the spraying effect in the morning is obvious.

The spraying time is different depending on the agent.

The characteristics of different agents vary greatly. Such as avermectin.

It is sensitive to light, and it is easy to decompose and fail under strong light, so it is best not to use it in the morning and noon when the light is strong, but should choose to use it in the afternoon to evening when the light is weak. Bacillus subtilis.

Trichoderma harzianum, Bacillus thuringiensis.

and other microbial pesticides, most of which are ultraviolet rays in the light.

Sensitive, should not be used in strong light. In addition, microbial reproduction requires high environmental humidity, especially insecticides such as Bacillus thuringiensis and Beauveria bassiana, which need to be infected faster and more effective when the humidity is high.

First, the right medicine, when purchasing, you must read the product manual carefully, and choose according to the object to be prevented.

Second, the strict allocation of pesticides, to accurately weigh the amount of pesticides and the amount of water. If it is a mother liquor, the mother liquor should be diluted first.

3. Strictly follow the operating procedures.

To apply pesticides, choose a sprayer according to the type of pesticide: spray fungicide and choose a nozzle with smaller droplets; Spray insecticides, choose a spray head with slightly larger droplets; Spray herbicides.

Use a fan-shaped nozzle. Choose a sunny day without wind before and after sunset to spray, and do not spray in rainy and windy weather, high temperature and strong light. According to different control objects, the corresponding pesticide application technology is adopted. The liquid medicine should be sprayed evenly and in place, and the inner chamber of the plant and the front and back of the leaves should be sprayed in place.

Under normal circumstances, the effect can be seen two or three hours after spraying, and the time of pesticides with different toxicity is also different.

The vegetables planted have insects, and it is better to spray pesticides in the morning or at night. The vegetables planted have insects, and it is better to spray pesticides in the morning or at night.

The best time to spray pesticides in summer is before 10 a.m. and around no.m. Because around 9 o'clock in the morning, the general dew has dried, the temperature is not too high, it is the sunrise pest feeding, activity, mating is the most vigorous time, so at this time, the use of medicine, will not be because the agent is washed or diluted by the dew and reduce the efficacy, will not cause the decomposition of the agent due to the high temperature, affecting the efficacy. On the contrary, at this time, the use of pesticides will increase the chance of pests feeding and touching the pesticides, and effectively improve the lethality of pesticides.

At about 5 o'clock in the afternoon, the sun has turned west, it is the time of "sunset in the evening of the west mountain", the light intensity is relatively weakened, and the nocturnal pests begin to be active (feeding, mating and other activities), so at this time, the spraying is just before it is harmed, and there is also a high insecticidal rate.

Different pesticides have different effective time, some pesticides are immediately effective, you can see the effect immediately after spraying, most pesticides will be effective after a few hours after spraying, but now the pesticides still have a slow release, the effective time of this pesticide is relatively long, most of them only see summer after 2 or 3 days, but this pesticide is not affected by rain, as long as it does not rain within 8 hours after spraying, it can play a normal effect.

When spraying pesticides, not only to know how long the pesticide can be effective, but also to choose the best time, most pesticides are suitable for spraying on sunny days, the best time to spray is about 10 o'clock in the morning every day, if the spraying time is too early, there is still a lot of dew on the plant, it is easy to dilute the pesticide, which will affect the efficacy, and the sun is stronger at 10 o'clock in the morning, the dew on the plant has been volatilized, and then the effect of spraying pesticides is better.

Spraying pesticides can also be, at about 4 o'clock in the afternoon, at this time the light is not too strong, suitable for spraying pesticides spraying people will not feel very uncomfortable, but choose to spray at about 4 o'clock in the afternoon, must be sprayed before entering the water at night, can not continue to spray after the dew appears, otherwise the drug will be diluted, and will let the sprayed pesticides drip down with the leakage, so that it can not play the due effect at all, is not conducive to the prevention and control of plant diseases and pests.

Most pesticides can produce effects within 1 4 hours after spraying, after which a small amount of rain will not have a serious impact on the effect of spraying, and an appropriate amount of laundry detergent can also be added when spraying pesticides.

Or cassava. pulp, which can increase the adhesion of pesticides, will make it stick to the leaves of plants, even if it rains, it will not have a significant impact on its efficacy, can ensure the effectiveness of pesticides. In addition, when spraying pesticides, we must do a good job of safety protection, pay attention to personal safety, do not let pesticides enter the mouth and nose, and avoid drug poisoning.

When spraying pesticides, it should also be noted that some pesticides are wettable powders, the spraying time of this pesticide is different from other pesticides, it is suitable for spraying in the case of heavy dew or fog, because these drugs can easily leak, can be quickly absorbed by plants, can enhance its sanitizing speed through dew and large objects, will improve its efficacy, but also prevent medicinal ingredients will make the effect of the drug significantly improved.

It takes about 4-10 hours to see results. When we spray pesticides, we must not choose rainy days, nor do we choose hot weather.

It usually takes about 7 to 12 hours, so after spraying pesticides, try not to enter the place, and then you should also do enough work, and pay attention to rainwater.

Noticeable results can be seen in a few hours, and some pesticides are particularly slow to act, taking about two days.

After spraying pesticides, the plants can be watered as long as the spray on both sides of the leaves of the plant is dry, and it takes about 1 hour.

At the very least, wait two hours, and it's when the weather is nice. Wait for the pesticide to be absorbed.

Plants that have been sprayed with pesticides can be watered at any time as long as they are not sprayed and watered but irrigated, so that the efficacy of the medicine will not be affected.

Depending on what pesticide you are spraying, if this pesticide only acts on the leaves of the plant, then you can water it after spraying. Because watering is not rain, rain will dilute pesticides. If a herbicide or similar is used, the tax should be paid after the day at least after the day of the application.

Pesticides are applied to crops, and the effective period of general pesticides is 7 days, 1-2 days short, and about 15 days long. The residual effect period is generally 60 days for high-toxicity pesticides and 15 days for high-efficiency and low-toxicity pesticides.

Several commonly used methods for identifying the "failure" of pesticides.

1. Intuitive method:

Intuitive method for powder pesticides, first look at the appearance of the agent, if it has been significantly damp and agglomerate, the smell of the medicine is not strong or there are other peculiar smells, and can be rubbed into a ball by hand, it means that it has basically failed; For emulsion pesticides, let the bottle stand first, if the liquid is turbid or stratified (i.e., oil-water separation), there is a precipitate or flocculent suspension, indicating that the agent may have been invalid. The heating method is used for powder pesticides. Take 5 10 grams of pesticides, put them on a piece of metal and heat, if a large amount of white smoke is produced, and there is a strong pungent smell, it means that the agent is good, otherwise, it means that it has been invalid.

2. Floating method:

Suitable for wettable powder pesticides. Take a cup of 200 grams of clean water first, then weigh 1 gram of pesticide, gently and evenly sprinkle it on the water surface and observe carefully, it is a pesticide that is not invalid and can sink in water within 1 minute, otherwise it is a invalid pesticide. Suspension method: Suspension method is used for wettable powder pesticides.

Take 30 50 grams of pesticides, put them in a glass container, add a small amount of water to make a paste, then add 150 200 grams, stir with clean water, and stand for 10 minutes to observe, in which the non-invalid pesticides have good solubility, the powder particles suspended in the liquid medicine are fine, the sedimentation speed is slow and the amount of precipitation is small, and the invalid pesticides are the opposite. The oscillation method is used for emulsion pesticides. For the pesticide with oil-water stratification, first shake the bottle vigorously, stand for 1 hour and then observe, if it is still stratified, it means that the agent has deteriorated and failed.

Hot melt method: hot melt method is used for emulsion pesticides. Put the pesticide with the precipitate together with the bottle into warm water (the water temperature should not be too high, 50 60 is appropriate), observe after 1 hour, if the precipitate slowly dissolves, it means that the agent has not been invalidated, and the precipitate can be inherited and reused after dissolving; If the precipitate is insoluble or insoluble, it has become invalid and can no longer be used.

3. Dilution method:

The dilution method is used for emulsion pesticides. Take 50 grams of pesticides, put them in glass bottles, add 150 grams of water, shake vigorously and let stand for 30 minutes, if the liquid is average milky white, otherwise it is invalid pesticides, and the more oil slicks on the upper layer, the worse the medicinal properties.

Hello I am glad to answer for you, after spraying, weedicide pesticides will generally be ineffective in 7-10 days. If there is a heavy rainstorm during this period, the rain will wash away the solution, causing the medicine to fail prematurely. In addition, many people will regret the jujube for dilution when spraying pesticides, and the toxicity of herbicides will expire depending on your dilution concentration, under normal circumstances, paraquat will volatilize in a very short period of time after contact with soil and air, and there is no pollution to the atmosphere, but if the concentration is too high, it is difficult to volatilize in more than 1 hour, and it will take about a week.

In general, most herbicidal pesticides will be ineffective between a few days and a few weeks, but there are some drugs that can last for several months. In addition, it is important to note that long-term use of the same herbicide can lead to contamination of crops, soil, and the environment, while also increasing the risk of herbicide resistance. The above suggestions are for your reference I wish you a happy life and all the best! 拾殺

Summary. Hello, It is best to store pesticides for no more than 24 hours after mixing with water, and they are generally ready to use. If you have a lot of liquid medicine at one time, you should store it in a cool place.

Stir it well before reusing. Note that the longer the water is stored, the weaker the effect of the drug.

Hello, It is best to store pesticides for no more than 24 hours after mixing with water, and they are generally ready to use. If there is a lot of liquid medicine at one time, it should be stored in a cool place. Stir well before re-rubbing use.

Note that the longer the water is stored, the weaker the effect of this reincarnation will be.

In addition, different pesticides have different expiration times, but after 24 hours, there will be precipitation and delamination, which will affect the actual effect of spraying.

After the pesticide is diluted, it can be put for about 1 day at most, and the longer the annihilation time, the worse the effect of the drug cultivation will become, and precipitation may occur. When reusing the drug after storage, stir the drug well to avoid drug precipitation.

After four or five days of diluted pesticides, can you add some water and pesticides?

The time it takes for a pesticide to fail after mixing with water depends on the type of pesticide. The dosage shall not be arbitrarily increased in the dispensing, and the liquid or powder shall be weighed according to the prescribed dose.

Hello, what pesticide are you using?

It is recommended not to use it, add medicine, and then add water to dilute, the effect is not good, and if the concentration is too high, it will also be harmful to crops.

Oooh. Generally, it is matched on the same day and used on the same day to avoid invalidity, and it does not have the effect of insecticide or weeding, and it is in vain.

This means that after a few days, the prepared pesticide will not be used, right?

Yes dear. When used on fruit trees, it is easy to produce pesticide damage, right?

The effect is not good, when the time comes, you will not be able to kill insects and socks and kill mites, and it will affect your harvest.

How long does it take for the drug to expire after it is prepared, the key depends on what pesticide and water quality, if the water quality is neutral or slightly acidic, the pesticide will be placed for a longer time after it is prepared; If the water is alkaline or acidic, the storage time is shorter.

If it is a single agent, it will be placed for a long time, and the mixed pesticide will be placed for a short time. In short, after the pesticide is prepared, whether it can be used for 4-5 days depends on the service or the specific situation. Although the liquid medicine does not react when it is just dispensed, it does not mean that it can be left for a long time at will, otherwise it is easy to react slowly, so that the effect of the medicine will gradually decrease.