What are the four ways to test pesticides?

Pesticides also have an expiration date, sometimes our pesticides are put for a period of time and want to test whether they are effective, then in this case we need a certain method to check whether the pesticide is effective, if it is invalid, there is no need to use it again, after all, the invalid pesticide not only does not have an effect, but also easy to cause drug damage, the use of it will only outweigh the losses, and then let's take a look at what methods should be used to identify.

If our pesticide is a pesticide in powder form, then it can be tested by fire to see if it is effective. <>

There are many different pesticides that should be used in different ways, for the powder form, then you can choose a metal container, and then put the pesticide on the metal container with fire to burn, if the smoke comes out, then a result can be explained is that the pesticide has not lost its effect, or can continue to be used. If black smoke and yellow smoke come out when burning, then you should pay attention to it at this time.

For emulsion pesticides, we can choose to use the first shaking method to identify whether it is effective. <>

Emulsion pesticides are the same as milk, as long as we shake it up and down with the method of shaking it in a static place, patiently observe, if there is delamination, then the pesticide has lost its effect and can not be used continuously. Because the pesticide layering indicates that a physical reaction has occurred, and even some substances have begun to condense, even if they are used, it will not be effective, but will cause unnecessary trouble.

In addition, it can also be dissolved to identify whether the emulsion pesticide has lost its efficacy.

When we soak the pesticide in 50 60 degrees of water, if the sediment dissolves at the bottom of the bottle, then the pesticide is still effective or can be used. <>

For powdered pesticides or emulsion pesticides, you can also choose to mix with water to identify.

Pesticides need to be mixed with water and then sprayed, when we mix these pesticides with water after full stirring, to see if there will be precipitation, if precipitation, then the pesticide is invalid.

It can be tested by chemical reaction, or burned with fire, shaken, dissolved, or mixed with water for identification.

You can smell the pesticide, observe the condition of the pesticide, burn it, dissolve it in water, and see the relevant instructions of the pesticide.

There are four methods for testing pesticides: 1. Pesticide residue rapid detection method 2, enzyme-linked immunoassay 3, chromatographic rapid detection method 4, pyrethroid pesticide rapid detection technology.

<> "Incorrect storage or expiration of pesticides can easily lead to drug failure, and it is difficult for ordinary people to identify due to pesticide failure. Here are four simple and easy ways to identify different pesticide formulations:

1.Powdered pesticides use the combustion method, take an appropriate amount of powdered pesticides and put them on metal objects and burn them in fire. If it comes out of the fire, it is not ineffective.

Powders or moist powders, such as leafhopper powder, promethazine and other pesticides, from the appearance, if they are moist, condensed, no toxic gas, mildew and bitter, pesticides are basically ineffective. Common liquid preparations, such as dichlorate, dimethoate, dichlorvos, chlorpromazine, temperature conduction, etc., are light yellow powders; Dimethoate powder is red ground powder; Poaceous herbicides are a light red liquid. If an inherent chromogenic agent is used, it is an indication that the insecticide has become ineffective and cannot be used.

2.Pesticide emulsion adopts the first method, because the emulsion pesticide is easy to eliminate, according to this characteristic, first see whether it is stratified. If it is not layered, it is effective; In the layer, shake it up to and down a few times to make it even, then leave it on for 40-60 minutes and then observe.

If there is no leak, it means there is no fault. If it's layered again, it can't be used.

3.Emulsion insecticide for dissolution precipitation. Place the bottle in water at 40-60 degrees for about 60 minutes.

If the sediment at the bottom of the bottle dissolves, it should indicate that it is not invalid; Sediment can be filtered. Take a certain amount and add an appropriate amount of hot water. If the sediment dissolves, it means that it can still be used.

4.The water method is used for powdered, wet powdered and emulsion pesticides. Put 50 grams of dust in a glass, add a certain amount of voltaic bucket water, stir to dissolve, and leave for about 30 minutes.

If the particles are evenly suspended and there is no precipitation at the bottom of the bottle, it indicates that the drug has not failed and the wet powder is easy to collect during storage. The cluster can be ground into dust first, and if it is dissolved quickly using a small amount of clean water that is missing, the cluster is effective. On the contrary, it cannot be used again; A small amount of the lotion can be placed in a glass, filled with the same water, shaken and let stand for 30 minutes.

If there are no oil droplets on the surface of the water and no sediment on the bottom of the glass, the emulsion is effective.

Observe the state of pesticides, you can smell the smell of pesticides, you can put them on the fire to burn, you can add some water to the powder to dilute and observe the state of the water.

The four methods are, one look, two smells, three touches, four soaking, local destruction to observe the color of pesticides, to smell the quiet taste of pesticides, to touch pesticides to answer the slag has a sense of particles, and to soak pesticides to observe the dissolution speed.

First of all, it is necessary to check the relevant identification of the pesticide that Tangerine refers to, and then it is also necessary to check whether there are three certificates on the appearance of this energy, and the shed also needs to check the ingredients of the pesticide, and it can also be identified by smelling the taste or looking at the shape.

We can first check the concentration of pesticides, and then after renting, we also have to see whether this destructive fiber pesticide is suitable for this disease, and finally we should first spray some fiber imitation spraying, and then see the effect before deciding. In this way, the medicinal properties of this pesticide can be well identified.

You can distinguish by type, you can also look at the ingredients of pesticides, or understand the instructions, you can regret the specific formula, understand the effect of pesticides, and pay attention to the use of medicinal effects, etc., these methods are effective.

1.can be passed through the packaging of pesticides, 2Date of manufacture, 3Lot number of the production, 4Shelf life, 5The composition of pesticides and other aspects are identified.

You can take a look at the outside packaging bag, if there is a production date and batch number on the top of the packaging bag, it is true, and the general Yanchi Mountain color is relatively transparent, there is no delamination on the Yedan stupid, there will be no agglomeration, and there is no viscous, so you can use it with confidence.

1.It can be identified with this medicinal effect, 2Through the production of medicinal powder, 3The use of drugs is a method of excess, 4Scope of use of medicines, 5Identification of the use time of the drug concealment.

Scientific dispensing and spraying are the key steps to ensure the effectiveness of prevention and control. If the drug is mixed with water, it will affect the concentration of the solution. If the concentration is too low, the efficacy will be poor, and if the concentration is too high, drug damage will occur.

In general, there are two ways to recommend the dosage of pesticide packaging, one is to use milliliters or grams per mu, which is more common in field crops; The other is how many times the liquid, which is more common in fruit and vegetable cash crops. Under normal circumstances, the agricultural material store can tell you how many acres of land or how many buckets of water in a bottle, and you can use it according to the instructions.

<> How do I mix pesticide dosage with water? Mainly through the example of illustration, first of all, the recommended water consumption, such as benzoyl-azoxystrobin suspension registered in rice sheath blight, the recommended dosage is 30-50 ml mu, according to the current farmers' drug habits, generally use a bucket (30 catties) of water, some use two or half a bucket of water, and there are also drones to apply pesticides. The dosage of liquid medicine per mu is liters (1 liter = 2 catties).

Under normal circumstances, it is better to pump more water and prevent diseases by spraying evenly. The recommended medication method, with 50% carbendazim wettable powder for fruit trees dilution concentration of 500-1000 times, generally 30 kg per bucket of water, according to the concentration of diluent dosage = original dose, that is, 15 liters 1000 = liters = 15 ml, that is, 15-30 grams of 50% carbendazim wettable powder per bucket of water.

The correct way is to dilute the pesticide ingredients to be used separately, dilute one later, and then pour them into the dispensing box and dilute the next one in turn, so as to really play the role of secondary dilution to improve the efficacy. And the dilution has a sequential order, but also commonly used to put foliar fertilizer, wettable powder, water dispersible granules, is a suspension agent, small emulsion, water emulsion, water agent, re-emulsion, each added to the full stirring.

How to spray scientifically? First of all, the focus of scientific spraying is on the weather. Because temperature and humidity will affect the efficacy of the drug, if the dew is applied in the morning when the dew is not dry, the dew will dilute the concentration of the solution; Pesticides can not be applied in rainy days, and sprayed in rain within 1 hour after application; Temperatures that are too high or too low can affect the efficacy of the drug, especially when using herbicides.

Generally speaking, it is good to choose a temperature in the range of 20-30 for medication.

When using pesticides, we should pay attention to the weather conditions and temperature, spray pesticides in an appropriate amount and do not spray too much or too little, spray drugs according to the area of crops, pick some suitable agents, and spray different agents according to different crops.

When using it, it needs to be close to the growth of crops, and it is necessary to choose the right pesticides, spray them according to the dosage, spray them on the roots of crops, and it is best not to spray them when it rains.

We must prescribe the right medicine, seize the critical period of preventing pests and diseases, do not use drugs continuously, pay attention to the amount of medication, but also pay attention to the situation of drug damage, pay attention to the use of drugs.

In the current agriculture, the use of pesticides has already provided a very convenient way for many villagers and friends, but at this stage of the pesticide sales market, it is difficult to distinguish between the true and false pesticides.

1. Identify the authenticity from the pesticide label and outer packaging.

1. Identification from pesticide labels. The pesticide label should indicate the product name, pesticide registration certificate number, product standard number, production license number or product standard qualification certificate number and its pesticide related ingredients, content, net weight, product characteristics, toxicity, main use, operation method, manufacturing date, expiration date, labeling matters and manufacturing enterprise name, detailed address, zip code. If the pesticide is in bulk, it should also be marked with the bulk enterprise and the pesticide bulk registration certificate number.

2. Distinguish from the name of pesticide products. The product name on the label should be a common Chinese name or a reasonable and legal trade name. However, the naming of pesticide products on the current market is very messy, some take the trade name casually, and some add the words "king, emperor, fh, cp, type, type, thorn seed, high efficiency, no residue" and so on, which are all illegal names.

Pesticide consumers should first carefully check the pesticide label, but any product that cannot be undoubtedly included in the name of the pesticide ingredient in the product cannot be purchased casually.

3. The product specifications and models of the same measurement verification should be the same, and the size should not be different, and the inner and outer packaging boxes should be detailed, and there should be no damage.

4. Inquire about the product product certificate. In accordance with the "Pesticide Management Regulations" and related requirements, each product packaging wooden box should be accompanied by a product product certificate, pesticide consumers can first stipulate that the operator to provide a product certificate to ensure the quality of the products bought.

5. Loose pesticide products can not be purchased. Since manufacturers and operators can counterfeit anytime and anywhere, it is difficult to solve problems when they occur.

Second, identify the good and bad from the shape of agricultural quality.

1. Granules and wettable powder should be loose powders without low echo area. If there is clumping or more unevenness, it means that the moisture has returned, not only the particle size of the product does not meet the requirements, but the content of related ingredients may also change. If the color of the product is uneven, it is also an indication that there may be a product quality problem.

2. The emulsifiable concentrate should be in a homogeneous liquid state, without precipitation or suspended solids, such as segmentation and turbidity, or uneven emulsion dissolved by water or oil bleaching and precipitation, indicating that there is a very good chance of any problem with the quality of the product.

3. The granules and suspension solvent should be a circulating mixture, no agglomeration, long-term storage, and it is very likely that there will be a small amount of hierarchical condition, but it should be able to return to normal after shaking, if the product can not return to normal or still have agglomeration after shaking, indicating that the product has product quality problems.

4. If the flakes used for fumigation are powdery, it means that they are invalid.

5. The liquid agent should be in a homogeneous liquid state, without precipitation or suspended solids, and turbidity deposition generally does not occur after dissolving in water.

6. The tablet product should be evenly proportioned in size and should not be in the form of a lot of powder.

The method of judging the real and fake pesticides is to look, smell and touch, and many pesticides are relatively light in color, and the taste is not so pungent, and it feels granular.