What problems need to be paid attention to when spraying pesticides in winter?

Pesticides will be carried out in winter, after all, there will be some pests and diseases in each season, and we must do a good job of corresponding prevention. <>

The first point is that we need to add water when we use pesticides, and we can't add too much water, but according to its proportion.

Now the pesticides produced by different manufacturers of concentrated pesticides, their dilution degree is not the same, we generally use some water when sprinkling pesticides. At this time, we should strictly according to the manufacturer's instructions for proportional blending, some are 1:100, then we follow 1:

100, we can't increase the amount of this diluted water without permission, so as not to affect the efficacy of this medicine.

Second, we should not increase the concentration of pesticides to avoid pesticide damage. <>

There are some people in life who are clever and think that as long as my concentration is higher, then these weeds and pests can be killed faster, but this is not right. Pesticides are accurately calculated to have a lethal effect on some weeds and some insects, but if our concentration is too high, it will affect our crops, and then the pesticide damage will outweigh the losses.

Number 3: Try to avoid rainy weather, so that the effect will be better.

Pesticides are soluble in water, if we just encounter rain when we sprinkle pesticides, it will be troublesome, we have to stop, and after the rain clears, the dew is dripping, then we sprinkle pesticides, if there is still a lot of water residue on this crop, at this time we spray pesticides will cause the concentration of pesticides to be diluted, which will affect the effect of this pesticide. <>

Fourth, don't spray pesticides when you're about to harvest.

Pesticides will have some pesticide residues, the residue period is a week, some are three days, some are 15 days, we have to judge the use according to the type of pesticides, if you are about to pick, then do not spray pesticides.

In winter, we must pay attention to the temperature when playing pesticides, if the temperature is particularly low, pesticides have no effect, so the temperature should be kept at about 20 degrees, when playing pesticides, in a closed space, so that the effect of pesticides can be played to the best, when playing pesticides, pesticides and warm water should be mixed into potions according to a certain proportion.

It is necessary to pay attention to pesticides at noon, the temperature at this time is relatively high, it is easy to make pesticides effective, and there are pesticides on sunny days, so that there will be no rain, so that pesticides can have better effects, these problems are to be paid attention to, so that you can better spray pesticides in winter.

Pay attention to the time of pesticide application, the choice of drugs, etc. Pay attention to the time of spraying pesticides, generally choose to spray pesticides on sunny days, which can play a role but will not produce effects; The choice of drugs should be based on the characteristics of the crop to avoid counterproductivity.

There are also some misunderstandings about the use of pesticides in winter, which need to be paid attention to, and when we choose pesticides in winter, do not think that the higher the concentration, the better. Generally speaking, there will be a matching ratio on the instructions of pesticides, we can use pesticides according to this ratio, if we increase this concentration without authorization, then it will only increase our economic cost, after all, the current price of pesticides is not cheap, and the effect of increasing the concentration is not very obvious, so it will naturally outweigh the losses, so it is not worth advocating. <>

When using pesticides in winter, pay attention to this time period of use. If we choose to spray pesticides at this time, the effect will not be particularly obvious, after all, pesticides are dissolved in water, if we have blended well, the pesticide is sprayed on the crop, and the crop has dew, and the concentration of the pesticide will be further diluted, which will affect the efficacy of the pesticide, so spraying pesticides must wait until the dew is dry before spraying. <>

Because of the climate, when pesticides are used in winter, the degradation rate of pesticides is often very slow, so we need to strengthen this safety cycle. In spring and autumn, we spray pesticide pesticide residues for a long time, but in winter we have to extend it for 3 to 5 days, or even for about a week, so as to effectively ensure food safety. Of course, if you are using a high-efficiency, low-toxicity and residue-free pesticide, then this can be ignored.

The winter solstice uses pesticides, and you must stir it evenly when pairing, don't think that the weather is too cold and don't want to stir, this lazy really can't steal. If the pesticide is not stirred evenly, then there will be a situation when spraying, that is, some places can effectively kill some germs or insects, but in some places there will be incomplete killing, often causing harm to crops, so we should stir evenly.

When using pesticides in winter, we should pay attention to the air, temperature, light, time, moisture and other issues, so that we can correctly apply pesticides to crops.

Be sure to pay attention to the ratio of pesticides, not too strong, not too light, otherwise it will have an impact on the efficacy, and it is best to choose a higher temperature at noon at the time of spraying, which is easier to exert the medicinal properties.

The problem that needs to be paid attention to when using agriculture in winter is that we must not hurt our crops, because if we hurt our crops, it will bring very large losses to ourselves, and these gains outweigh the losses.

Growing crops and spraying pesticides is normal. However, accidents due to pesticide spraying occur every year, especially during the winter months. If you are not careful, the pests, diseases and weeds in the field will not be able to **, and there will be problems with the crops, resulting in reduced yields.

Choose the right insecticide. There are some pesticides on the market that do not reduce their effectiveness at low temperatures, some fail at low temperatures, and some suffer from drug damage at low temperatures.

When preparing to spray pesticides, be aware of the weather conditions for the next few days. If the temperature is low, choose a drug that will not be greatly affected by the effect at low temperatures. In cold weather, the amount of chemical solution absorbed by diseases, insects and weeds will be relatively reduced.

At this time, the concentration of some medicinal solutions can be appropriately increased to achieve the purpose of death. In the cold weather of winter, the evaporation of the potion will also become relatively slow.

For pesticide varieties with a long residue period and early planting in the next season, caution should be exercised, especially herbicides, so as not to cause herbicide harm to low crops. During the cold winter months, crops and weeds are dormant or semi-dormant and have low capacity for pesticide absorption and utilization. Pest activity is very rare.

Pests usually hibernate and lose their ability to harm. For crops grown in greenhouses, due to the high temperature in the greenhouse, pesticides can be sprayed if insecticide, disease prevention, and nutrition supplementation are needed, and the impact is not great. However, it should be noted that the greenhouse should be ventilated from time to time.

Factors such as the active ingredients, additives, and processing technology of pesticides will vary, but if the temperature is too high or too low, such as a high temperature above 35 degrees Celsius or a low temperature below 5 degrees, the use of pesticides is not recommended. Excessive pesticide residues in agricultural products not only affect food quality and safety, consumer health, but also affect the export of agricultural products and even the development of the agricultural industry. Beijing Strawberry Slices has had a significant impact on the production and sales of strawberries in China, affecting consumers and causing huge losses to farmers.

When using pesticides in winter, we must pay attention to the setting of temperature, do not use pesticides at low temperatures, which will affect the effect of pesticides, and should also pay attention to the proportion and dosage of pesticides, do not use pesticides excessively, otherwise it will affect the yield.

In winter, we must pay attention to the temperature when applying pesticides, if the temperature is particularly low, the effect of pesticides will be very poor, and we should also pay attention to the emission when applying pesticides in winter, the temperature is best to be about 25 degrees, after spraying pesticides, it is best to water less, but also stay in a confined space for a period of time.

It is necessary to pay attention to the shelf life of the medicine, to pay attention to whether the medicine is suitable for use, to pay attention to the mixing ratio of the medicine, to pay attention not to spray on people, and to pay attention to temperature and weather.

Be sure to pay attention to dilution, good protection, so as to avoid injury, and spray pesticides must be lower, so that the spray is more even, try not to choose to spray pesticides in windy weather or before rain.

Be sure to protect your body, and be sure to dilute pesticides when using them, and also use them in windless weather.

To protect personal safety, be sure to wear protective clothing, masks, hats, gloves, and when using pesticides, you must choose at 10 o'clock in the morning, when the temperature is more suitable, and you should choose the right agent according to the variety of crops.

In winter, when the temperature is relatively low, it is necessary to pay special attention to the use of pesticides and fertilizers to ensure that they can do their best with their strengths. For example, some pesticides will weaken with the decrease of temperature at low temperatures; For example, under low temperature conditions, which chemical fertilizers should not be applied to crops, and which fertilizers are suitable for more application. Today, I will popularize for us how to use pesticides and fertilizers rationally in winter!

What are the areas that must be paid special attention to in the process of use?

1. Pesticides suitable for use in winter.

Some pesticides (such as dimethoate, etc.) are greatly harmed by temperature, and their medicinal power is significantly weakened with the decrease of temperature, while some pesticides (such as dimethoate, etc.) are less harmed by temperature, even at lower temperatures (below 15), they can also stimulate their conventional insect repellent effect. Similar to dimethoate, there are also pyrethrins, etc., which are more toxic at low temperatures (below 15) than at high temperatures (above 25).

Therefore, to prevent crop diseases and insect pests in the low temperature season of spring and winter, it is necessary to pay attention to the use of pesticides that are less harmful to temperature, so that the medicinal power can play a greater role. Winter is coming, the temperature is greatly reduced, most of the theme activities and injuries of crop diseases and pests are hidden and stopped, and the following problems should be paid attention to when preventing crop diseases and pests.

2. Effectively use pesticides suitable for winter use.

Under normal conditions, gastric poisons and contact killers are less harmful by temperature, and systemic agents and tobacco agents are more harmful by temperature. For example, low temperature such as insecticidal double will significantly harm the actual effect of insect repellent, while pesticides such as deltamethrin, phosphine, dimethoate oxide, etc., can still give full play to the actual effect of insect repellent when used at a lower temperature. Therefore, to prevent crop diseases and pests in winter, it is necessary to pay attention to the use of pesticides that are less harmful to temperature.

3. Choose a sunny day and a high temperature time period to take medicine.

In winter, when the temperature is high, the movement area and inspiratory compressive strength of the insect pest are expanded, the amount of food is increased, and the medicine is sprayed on the insect body, and there are many medicines that are sent to the body, which is beneficial to give full play to the poisoning effect.

Fourth, increase the dose moderately.

The lethal dose of pesticides for insect pests is not stable, the lower the temperature at room temperature, the lower the lethal dose of insect pests, so the dosage is moderately increased in winter, and the food and drugs that can prevent pests are not dead. However, it should not exceed the "safe concentration" (the maximum allowable dosage that does not produce fertilizer damage). When pesticides are used in winter, water should be released strictly according to the dilution factor, and the amount of water used cannot be increased or decreased arbitrarily.

Fifth, improve the way of pesticide application.

To prevent greenhouse crop diseases and pests in winter, the smoke method or smoke and dust method should be used as much as possible; If spraying is used, the frequency of prevention and control and the amount of spraying should be reasonably reduced to avoid excessive temperature in the shed.

6. Moderately increase the safety observation period.

In winter, the dissolution rate of pesticides slows down, and the time for pesticides to remain in the crop body is relatively long, so when preventing diseases and pests of vegetable and fruit crops, it is necessary to moderately increase the number of days between the last application of pesticides and picking of crops (that is, the safety observation period) to ensure the safety of taking.

Be sure to choose the right temperature for spraying, to avoid pesticides to bring harm to plants, be sure to choose the right concentration, choose the right time, so that you can better protect the plant, you need to choose the right pesticide.

The precautions are that we must pay attention to the protection of the land, do not apply excessive pesticides, do not operate pesticides in violation of regulations, and must take protective measures when using pesticides, and protect our own bodies.

First of all, we should pay attention to the temperature, and the time to spray pesticides must be sunny or in the morning, and then when we also spray pesticides, we must also choose the right equipment, and we also need to pay attention to the time and weather of spraying.

1. Reasonable selection of pesticides suitable for winter application, under normal circumstances, stomach poisons and contact killers are less affected by temperature, and systemic agents and fumigants are more affected by temperature. Pesticides such as deltamethrin and phosphos can still exert a good insecticidal effect when applied at lower temperatures. Therefore, to prevent and control crop diseases and pests in winter, we should pay attention to the selection of pesticides that are less affected by temperature.

2. Choose to use the medicine during the sunny day and high temperature period, because in the winter when the temperature is high, the activity range and respiration intensity of the pest increase, the amount of food increases, the liquid medicine is sprayed on the insect body, and there are many drugs that are brought to the body, which is conducive to playing a toxic role.