How are pesticides diluted? What should I pay attention to when dilution?

Answer: The dilution of pesticides needs to pay attention to a lot, if you don't understand, it will make the pesticide concentration too high or too low, affecting the growth of crops. The following will introduce you to the relevant knowledge and precautions of pesticide dilution.

1. Dilution method

The percentage concentration refers to the amount of medicine and fertilizer in the 100% fertilizer solution or powder, which is denoted by "%". For example, 2% urea means 2 kg of urea and 98 kg of water in 100 kg of urea solution. The amount of active ingredient of the pesticide = the amount of pesticide commodity The concentration of pesticide commodity (%) is calculated according to the formula and diluted.

Second, the choice of water

Diluted pesticides are available in soft and hard water. However, hard water contains calcium, magnesium ions, etc. When diluting pesticides, it will reduce the suspension rate of wettable pesticides, which not only reduces the control effect of pesticides, but also easily produces plant toxicity to crops and clogs the nozzle.

Therefore, when diluting pesticides, soft water must be used, and it is best to use fresh water such as river water, river water, lake water, etc., so as to ensure the control effect.

3. Introduction to the method

When the amount of pesticide liquid is small, it can be diluted directly. The correct way is to pour one-third of the water into the prepared dispensing container, then slowly pour the dosage into the water, then add water and gently stir well with a wooden stick. Finally, pour the diluted pesticide into a large container (sprayer on the back of a person or a medicine cart's medicine bucket, etc.), and stir well.

4. Precautions

1.Avoid increasing the amount of water indiscriminately. When dispensing, the dispensing personnel should wear rubber gloves, and must use measuring tools to weigh the liquid medicine or powder according to the prescribed dose, and shall not increase the dose at will. The pesticide law should be strictly adhered to, and the dosage should be controlled.

2.Seed dressing should be stirred with tools, how much to use, how much to mix, and the seeds of mixed drugs should be sown by machine as much as possible. Protective gloves must be worn when sprinkling water or sowing seeds by hand to prevent **absorption poisoning. The remaining pesticide varieties after use should be destroyed and should not be used as food or feed.

3.Set up markers in places where highly toxic pesticides are used, and prohibit grazing and mowing for a certain period of time to prevent human and animal poisoning.

There are several ways to dilute pesticides, which can be diluted with water or soil, and should pay attention to wearing gloves for dilution, and the measuring tools used must be weighed according to the specified dosage to weigh the liquid or powder, and the amount shall not be increased arbitrarily.

Dilution according to the fixed ratio, according to the growth of the plant, when diluting, you must pay attention to the proportion of dilution, you must pay attention to your own protection, pay attention to wearing a mask.

It is necessary to choose the right agent according to the crop, pay attention to the ratio between pesticides and water in the dilution process, pay attention to the concentration, be sure to wear good gloves, and do not hurt **.

Try to choose water when diluting, the dilution ratio must be in strict accordance with the proportion on the manual, do not add water at will, you can choose a relatively large container.

Fertilizer dilution, tap water is very important, and many farmers do not pay much attention to the tap water of dilution fertilizer. This small key point is very likely to lead to chemical fertilizers not being able to give full play to their due preventive effects, and some will even cause unsuccessful prevention and even fertilizer damage, resulting in damage to agriculture.

Fertilizer dilutions cannot be made with hard water.

Water has a difference between water hardness and softened water, and in nature, water will melt carbon dioxide in the air, lime powder in rock layers, and finally produce calcium bicarbonate and calcium sulfate cations. The softness and hardness of water lies in the composition of its calcium and aluminum ions, the strength of drinking water measured in China is to calculate the calcium, magnesium melted in the water as calcium bicarbonate, and the calcium bicarbonate component in each liter of water is the unit of quantity, when the composition of calcium bicarbonate in the water is less than 150mg liters, it is called softened water, and it is water hardness when it is 150-450mg liters, and it is high water hardness when it is higher than 714mg liters.

The general water hardness will be river water, sea water, sea surface and other water with more calcium, magnesium and other organic matter, the strength is generally 18-20 degrees; Demineralized water has rivers, lakes and other talking water, contains less calcium and magnesium and other chemicals, and its strength is around the degree.

The calcium, magnesium and other components contained in the hard water can reduce the floating rate of wettable drugs or form calcium and magnesium precipitation with the demulsifier in the emulsifiable concentrate, destroying the emulsion properties of the emulsion of the emulsion, which will not only reduce the control effect of chemical fertilizers, but also may cause fertilizer damage and block the printer nozzle. Soft water contains less chemicals such as calcium and magnesium, which is not easy to destroy the performance indicators of drugs and reduce the control effect. Therefore, in the case of dilution liquid fertilizer, we must not be careless and negligent, we must use softened water, it is best to use water flow, rivers, lakes and other water, in order to ensure the medicinal properties and control effect of chemical fertilizer, to eliminate pests to the greatest extent, and to ensure agricultural effectiveness.

Therefore, when diluting liquid fertilizers, tap water must be softened water, and it is best to use natural precipitation and dew and frost in water flows, rivers, lakes and other water and equipment to ensure the prevention effect.

If you want to dilute it with water, the best way is to use it in a ratio of 3:3, and then spray it, then the effect is very good, don't put less water, otherwise the effect will not be very good.

Add fresh water to the pesticide, generally soft water, do not use river water, lake water, at about 18, add 10% water to a pound of pesticides.

According to different crops, and then choose the right water for proportion, and then add a small amount of water many times, and then be sure to understand the ratio of pesticides, there are many pesticides that cannot be diluted with water.

There is nothing particular about, the water we drink at home can be diluted, and it is very convenient to dilute, only a certain proportion is needed.

Taking the diluted powder pesticide as an example, if the weight of each bag of powder is 10g, it needs to be diluted to 1500 times. If the whole bag is used, the amount of water added is 10 1500 = 15000g, that is, 15kg. Generally speaking, 1 liter of water is about 1 kilogram, so it takes about 15 liters of water to prepare a bag of medicine.

When diluting pesticides, choose clean water, strictly control the dilution concentration, and prepare in strict accordance with the relevant instructions to avoid pesticide damage.

<>For example, if the pesticide needs to be diluted 1500 times, the weight of each bag of powder is about 10g, and if the whole bag is used, the amount of water added is 10 1500 = 15000g, that is, 15kg. Generally speaking, 1L of water is about 1kg, so a bag of medicine needs to be mixed with about 15L of water. Note:

Since the dilution of pesticides is usually large, the weight of the pesticide itself can be ignored in the calculation.

When spraying pesticides, it is inevitable that there will be problems in formulating liquids. Pesticide formulations, whether wettable powders, emulsions, or water-dispersible granules, have high concentrations. Direct use will definitely cause harm and it needs to be diluted to a concentration that is safe for crops.

On the other hand, spreading a small amount of pesticide evenly on a field or crop also needs to be diluted, that is, the concentration is reduced, but too low a concentration will be ineffective. To be safe and effective, it can be used by limiting the concentration of the drug or limiting the amount of the drug per unit area. For this reason, the following provisions are set forth in the manual.

For example, for the prevention and control of bacterial wilt of eggplant, 300 times of 14% copper ammonia or 500 times of 50% copper succinate (DT) wetting agent should be used to irrigate the roots. That is, 1 liter of 14% copper ammonia plus 300 kg of water or 1 kg of 50% copper succinate wettable powder plus 500 kg of water.

Because 1 kilogram of water can be equivalent to 1 liter of capacity, copper ammonia is formulated by volume and copper succinate is formulated by weight. Although there is a little error, it is completely negligible when operating in the field. A similar note also specifies the amount of water to be used per unit area.

For example, 30-40 grams of 25% pyridine wettable powder per mu should be used to prevent and control white-backed planthoppers, and 50-75 kg of water should be sprayed for control. This is a clear, universal directive.

My understanding is that when diluting pesticides, they must be diluted in proportion, not casually, not stored with other pesticides, not diluted with other pesticides, and the diluted pesticides should be put in accordance with the label.

Anyway, pesticides will generally be diluted 1500 times, 10g of pesticides need 15 liters of water, and the dilution ratio specified in Chinese patent medicine is generally 300 times or 500 times, for the prevention and control of eggplant bacterial blight, it is suitable to use 14% ammonia copper 300 times dilution.

It is necessary to pay attention to the instructions for the use of pesticides, be sure to use water as a dilution, or soil as a dilution, and be sure to wear rubber gloves when preparing the liquid, and use equipment to stir.

Use water as a dilution, weigh it accurately, stir evenly when diluting, wear gloves when diluting, wash hands after dilution, and so on.

With the development of modern life, many people will put a variety of green plants on their balconies or office spaces, after all, an environmental environment with green embellishments is a comfortable environment, which leads to not only rural families will use pesticides, urban families will also begin to use pesticides, but pesticides are different from other things, after all, it is also harmful to the human body, so in the process of dilution of pesticides, what problems need to be paid attention to? Combined with personal pesticide use, I feel that I should pay attention to some of the following aspects:

First, the selection of water quality, to choose soft water. Many pesticides need to be diluted with water, especially for plant pests and diseases, we should pay attention to the problem of water quality, we all know that there are two kinds of water, one is hard water, the other is soft water, and the distinction between these two types of water quality is determined by pH and hardness. Water with a hardness of more than 10 degrees is called hard water, and water with a hardness of less than 10 degrees is called soft water.

Diluting pesticides with hard water can reduce the effectiveness of some pesticides or cause plant toxicity. Therefore, dilution should be done with soft water. In general, unpolluted river, canal, lake or rainwater is soft water.

And the tap water we use in our lives is hard water because of the addition of other substances, especially the tap water in the northern region.

Second, when selecting soil, it is necessary to choose moist fine people without salt and alkali. There are some flower plants it likes dry, and if sprayed pesticides for a long time, it will inevitably affect the growth of flowers and plants, at this time you can use the soil as a thinner, and when the soil is used as a thinner, the selected soil must be free of saline-alkali moist fine soil. There are many types of soil, but sandy loam soil is the best because it has fine particles and good water absorption, which mixes well with other soils.

3. Accurately weigh the dosage of drugs and diluents, and do not estimate them arbitrarily. A lot of agricultural drugs, it has a strict dilution ratio, and for different plants, the dilution ratio will be different, just like our more commonly used carbendazim, when spraying the fruit trees at home, it is basically 50 1000 times the ratio, but when spraying lotus, it is basically 50 60 grams per mu, if the concentration is too heavy, it will inevitably cause harm to flowers and plants, the concentration is too light, and can not achieve the effect of curing diseases and repelling insects, and finally causes plant death. Therefore, it must be avoided proportionally.

Fourth, pay attention to the relevant work before and after pesticide dilutionMany pesticides are highly toxic, so it is necessary to make relevant protective preparations, such as masks and gloves, to prevent absorption and poisoning. When blending, it should be kept away from drinking water, and the relevant pesticides should not be taken out of their sight to avoid the loss of pesticides. Spraying should be stopped during high winds and high temperatures at noon, and it should not be sprayed before rain.

After the medication work is completed, the relevant tools should be cleaned in time and returned to the warehouse for storage together with the remaining drugs. The effluent generated should be properly disposed of in a safe place.

Dilution with water, dispensing personnel should pay attention to specifications, etc. Dilute with water, preferably with pH-neutral water; Dispensers should pay attention to specifications, such as wearing gloves and using tools when stirring.

Be sure to pay attention to the pesticide ingredients, and there are many pesticides that cannot be diluted with water, and then we must pay attention to the spraying range, we must spray evenly, and we also need to choose the right pesticide according to the form of the crop or the situation produced, and then we also need to pay attention to the appropriate ratio.

Do not use well water, grasp the ratio of water and pesticides, do a good job of personal protection, to prevent poisoning, but also to dilute in a ventilated place.

Pay attention to the role of dilution, but also pay attention to the collocation, but also pay attention to the way of dilution, understand the process of dilution, and also pay attention to contraindications.

Pay attention to the concentration of pesticide dilution, the concentration is not too low, can not cause harm to crops, pay attention to the key points of Shih Tzu Bu shortage, pour water and then pesticide first, lack of potatoes and pay attention to wear a mask when diluting drugs, wear corresponding protective measures, to avoid harm to yourself.

These key points of attention are to pay attention to the dilution process, pay attention to the preservation method of dilution pesticides and tremors, pay attention to the proportion of dilution, pay attention to the strength of dilution, pay attention to the proportion of prevention of pesticides, and also pay attention to the proportion of pesticides and water.