Can rain spray pesticides, and if it rains just a few hours after spraying pesticides, will it affec

The subject is asking if you can use pesticides when it rains? If this is the question, then the answer is that it is better not to fight, whether it is raining or it raining after playing. Or after the rain, it will greatly dilute the medicinal properties, reduce the effect, or even have no effect.

Generally speaking, rain after 4-5 hours will not affect the efficacy of pesticides, but fungicides are best to rain 5 hours after application in order to receive effective control effects.

It's okay to spray for how long it rains.

5 hours. Generally, after spraying, if it rains at an interval of 4 to 5 hours, there is no need to spray.

2. The effective time of different agents.

Contact insecticides rain every 3 hours and do not need to be sprayed; The efficacy of the systemic type will be reduced, and the rain will not affect the efficacy of the fungicide 5 hours after application.

However, some fungicides do not need to be sprayed in the drizzle, so after spraying, it should be determined according to the actual situation of the agricultural area used, and there is no unified standard.

3. The time interval between spraying and rainfall.

According to the general rate of pesticide absorption by plants, the active ingredient can absorb about 70% in 1-2 hours, and the active ingredient can absorb 60%-80% in 4-6 hours.

If the spraying time is more than 4 hours away from the rainfall time, then the pesticide solution has been fully in contact with the crop and has been absorbed, which has played a part of the role of inhibiting pathogens or killing pests or inhibiting the metabolism of weeds, and there is no need to respray at this time.

However, the rain will definitely wash away part of the solution, which will affect the duration of the solution. But if you spray today, it will rain tomorrow, and there will be a day in between, no matter what pesticides you do, you basically don't need to spray them.

You said that it would rain an hour after spraying pesticides, so it is recommended to respray.

In rural areas, it is indispensable for farmers to plant pesticides. We farmers know all this common sense. Be optimistic about the weather before spraying.

Do not use pesticides when the sun is fierce, as the effect of the medicine will be lost too quickly. Pesticides should be sprayed in the afternoon. Contact killers such as pyrethroids can kill more than 90 people for half a day (4-6 hours) before rain; In general, the effect of fungicide can be seen after two days, and the effect of insecticidal dimethoate can be seen after three days (72 hours).

Stomach poison is like acaricide, and the effect can be seen in the afternoon and evening.

This cannot be generalized, the average farmer will look at the weather forecast before spraying, and only apply the medicine when there is no rain in the last two days. But there are unforeseen circumstances, in case it rains after spraying, it is necessary to remedy once, there are many kinds of pesticides, such as insecticides, fungicides are effective in rain for 2 hours! Generally, it is basically absorbed after three hours, so many pesticides can be sprayed again if it does not rain three hours after spraying, and if it rains within three hours, it needs to be sprayed again.

It's okay if it rains 6 hours after taking the medicine, but it also depends on the weather, only when the potion is almost dry, then it's okay when it rains.

Related to pesticide varieties, it generally rains 6 hours after pesticide spraying, and there is no need to respray; It is also related to the amount of rainfall, if you take the medicine, you must pay attention to the weather forecast in the past one or two days, and you can't be sloppy! There are many kinds of pesticides, some drugs are insecticidal, some pesticides are stomach insecticidal, it is best to rain after a day or two! When it comes to efficacy, most of the pests have been wiped out in four or five hours, or twenty-four hours!

Systemic pesticides are generally more resistant to rainwater washing, such as enoylmorpholine, and rainfall has little effect on the efficacy of the drug after 1 hour of use; EproTech (oxazolidinedione and mancozeb mixture) is used for 4 hours, and 80% of 90% of the active ingredients quickly penetrate into the plant body, and there is no need to spray it again in case of rain. After that, there was no respraying, and I didn't continue to fight. As a result, half of the leaves were green and free of pests and diseases, while the other half was not sprayed, but the leaves were flowery, and the leaf miners began to spin and droop.

The appearance of a leaf about to fall. The medicine that was beaten was fluorochlorine.

Depending on what pesticides are used, some pesticides are oily, and there is no need to worry about rain after spraying pesticides, but some pesticides are water-based, and you need to wait for plants to absorb them before they are afraid of rain.

Yes, because pesticides need a day to be absorbed, just after the rain will take away some of the pesticides, when pesticides are used, you must choose a sunny day.

Yes, in this case, all the pesticides will be washed out, and the desired effect will not be achieved, after all, the pesticides are not yet ready for fermentation.

Rain just after spraying pesticides will affect the effect of pesticides, because rain will reduce the concentration of pesticides, so that the effect will decrease.

It will affect the efficacy of the drug, even if the pesticide with a strong grip and slippery systemic foci skin balance, it takes 1-2 hours of absorption time to do it, if it rains just 1 hour after the drug, the rain will wash away a part of the liquid medicine, affecting the duration of the efficacy.

Hello dear, if it rains within two hours after the pesticide is applied, it may have a certain effect on the effect of the pesticide. Rain may wash away some of the pesticides, reducing their residue on the crop, thus reducing the effectiveness of the pesticides. In addition, rain can dilute pesticide concentrations, preventing them from having the desired effect.

If the rain is short, pesticides may still be able to leave some effect on the crop. However, if the rain slide chain is too long or the rainfall is large, the effect of the pesticide may be greatly affected. In order to ensure the effectiveness of pesticides, it is recommended to pay attention to the weather forecast before applying pesticides, and choose weather with no rain or low rainfall for application.

If it rains shortly after application, consider reapplying the pesticide or adjust it according to the specific situation.

Influential. The effect of the drug will not be completely gone, but it is possible that the effect will be reduced, you can wait for a moment or two to see the effect and then decide whether to respray. You can also refer to the drug instructions, and the effect of the sedan has been diluted into the soil.

How much will there be pesticide residues, it has been 2 hours and the effect has been absorbed, and some pesticides are played before the rain, there are such drugs will reduce the effect of the drug greatly, and the rain will stop and hit some more. Generally speaking, as long as there are insects killed by the pesticide when the farmer kills the insects on the crop, the effect of the pesticide is there, and the insects on the crop will basically die as long as they eat it after 2 hours.

Summary. Hello; Half an hour after the pesticide was applied, it rained and it didn't work.

Hello; Half an hour after the pesticide was applied, it rained and it didn't work.

If it rains an hour and a half after spraying, and the organophosphorus and polyester pesticides used to control the sap sucker have not been completely absorbed by the plants, it is recommended to make up the book again. In general, the absence of rain within one day after the application of the medicine has no effect on the efficacy of the drug. Talk quickly.

Under normal circumstances, pesticides will be effective after 4 hours. Here I would like to share with you a few precautions. 1.

In rural areas, it is indispensable for farmers to plant pesticides and fight holes. We farmers know all this common sense. Be optimistic about the weather before spraying.

Do not use pesticides when the sun is fierce, as the effect of the medicine will be lost too quickly. Pesticides should be sprayed in the afternoon. 2.

Farmers should not spray pesticides on rainy days, and pesticides should not be sprayed on rainy days, which will cause pesticides to fail. 3.Regarding the problem of adding pesticides with water, put a small amount of water into the sprayer first, and then add pesticides to make it even.

When adding water, please choose to add clear and clean water. If turbid water is added, it will also cause the spraying pesticide to fail.

Personally, I think that if it rains after you finish the fight, it is likely to affect the effectiveness of the medicine, after all, the rain washes away all these pesticides.

Rain after spraying pesticides will affect the properties of the medicine. Pesticides are generally fully effective within 72 hours of spraying, so if you want to spray pesticides, it is best to spray them in stable weather.

No, pesticides are mainly used to repel mosquitoes by taste, and after rain, pesticides will also remain on the leaves or soil, which can also play a role in repelling mosquitoes.

Spring sowing, at this time is also the high incidence of pests and diseases, but also the peak period of spraying pesticides, due to the recent frequent rain, and the weather forecast is not yet able to achieve accurate forecast, spraying pesticides may rain at any time. So will this affect the efficacy of the drug? It depends.

Clause. First, look at the type of pesticide. Some pesticides are systemic pesticides, which are generally more resistant to rainwater washing, such as tricyclazole, which rains 1 hour after spraying, which basically has no effect on the efficacy of the drug, and there is no need to make up for it. Clause.

Second, look at the time interval, sometimes after the pesticide does not rain for three or four hours, it will not have an impact on the efficacy, but sometimes just after the pesticide or before the rain is finished, in this case it may affect the efficacy of the drug, and it needs to be supplemented.