What are the problems of reasonable mixing of pesticides?

Proper mixing of pesticides is important.

The key to mixing is to use two or more types of fertilizers in the same sprayer at the same time. The effective mixing of pesticides can increase the application standard or treat several types of pest control, which can improve the efficacy; Some blends can even improve the drug power and alleviate the adverse reactions of drug resistance, fertilizer damage and other drugs. However, unscientific chemical fertilizer mixing will reduce the potency of chemical fertilizers or cause fertilizer damage.

Therefore, we remind everyone to pay attention to the following aspects to ensure the effective mixing of chemical fertilizers.

The physical properties and structure of fertilizer-related components are the basis of their biological activity. When mixed, it is generally not allowed to cause chemical reactions of related ingredients, which may harm the dissolution of related ingredients. Systemic and parabenic acid fertilizers are more sensitive to alkali, and pyrethroid insecticides and dithiocarbohydrate pesticide fungicides will also dissolve in the case of extremely strong alkali.

Chemical fertilizer mixing is not more than 4 kinds, and the mixed use of chemical fertilizers is generally appropriate for 2-3 types, and 4 can be used when necessary, which will easily cause adverse effects.

When mixing the secondary diluent, first add half a bucket of water to the sprayer and add the first fertilizer to stir. Then, pour another kind of fertilizer into a plastic bottle, add water to the dilution, and then pour the dilution into a sprayer and stir well, and so on.

The order of chemical fertilizer mixing should be precise, first release water and then dosing, and carry out the dilution.

The physical properties of the drug should not change after mixing.

This is also the most important standard for the mixed use of chemical fertilizers, if the mixed use of chemical fertilizers causes sedimentation, fading and other reflections, it should be discontinued. Although most of the species are relatively stable, they are only mixed and used under the standard that the alkali is not too strong.

Mixed fertilizers should be used effectively in the application amount. When two or more pests and diseases appear at the same time, and the mixed single drug is only reasonable for one pest, and the other prevention objectives are ineffective, the solution should contain a reasonable amount of a single agent when applied independently.

When a single dose of a certain type of prevention goal, such as a mixture, is reasonable, the amount of each single dose needs to be reduced accordingly. However, the actual use of each is much more, and it is generally determined according to the results of the study. Generally, it is based on the standard of drug harmony.

If there are 2 single doses in the mixed composition, the amount of use will be reduced by 50% each. If it is a single dose of three, the dosage of each is generally reduced by one-third.

The usual order of mixing a variety of pesticides is: wettable powder, water dispersible granules, suspension agent, water emulsion, emulsifiable concentrate, added in turn, it should be noted that each agent added, stir and mix well and then add the next one. Pesticide mixture should be used at any time, and the liquid medicine prepared on the same day should be used up on the same day.

If pesticides are mixed reasonably, we must pay attention to its order, because the pesticides are used with some chemicals, and if the order is wrong, it will cause very serious damage.

The order of pesticide mixing should be accurate: the order of foliar fertilizer and pesticide mixing is usually: micro fertilizer, water-soluble fertilizer, wettable powder, water-dispersible granule, suspension agent, microemulsion, water emulsion, water, and emulsifiable concentrate are added in turn (in principle, no more than three pesticides are mixed), and each one is fully stirred and mixed, and then the next one is added.

Add water first and then add medicine: When mixing for secondary dilution, it is recommended to add more than half a bucket of water to the sprayer first, and then mix after adding the first pesticide. Then, dilute the remaining pesticides in a plastic bottle, pour them into a sprayer, mix well, and so on (if you want the medicine to work well, don't be lazy).

The unreasonable allocation of pesticides will greatly reduce the efficacy, easy to produce chemical reactions, insecticidal and sterilization effects are not ideal, especially emulsifiable concentrate, thickeners, foliar fertilizers, etc., these products have high density, strong precipitation, easy to precipitate at the bottom, so there will be drug damage or poor drug effect, only scientific drugs and correct mixing methods can play a real effect.

Steps for pesticide mixing:

1. The pesticide mixing sequence should be accurate. When mixing pesticides, many farmers don't know which pesticide to add first. Some add foliar fertilizer first, some add emulsion first, and some add wettable powder first.

The mixing order of foliar fertilizer and pesticide is usually as follows: foliar fertilizer, wettable powder, suspension agent, water agent, and emulsifiable concentrate are added sequentially. Stir and mix each additive well before adding the next one.

2. Add water first, and then add medicine for secondary dilution. Many farmers mix pesticides, add pesticides to the sprayer, and then dilute them with water, which is wrong. Mixing pesticides is not simply mixed together.

To mix, a large bucket of water can be added to the nebulizer and the first pesticide is added to mix. Then the remaining pesticide is diluted with a plastic bottle, then diluted into a sprayer to mix, and so on.

3. Spray immediately after dispensing. Many times, farmers usually mix the medicine at home and then transport it to the field to spray. Generally speaking, the medicine is prepared for several hours before use, and although the liquid does not react at the beginning of preparation, it does not mean that it can be left unwilled for a long time.

Too long can easily cause the drug to evaporate and gradually reduce the efficacy. In addition, when farmers do not know whether they can mix pesticides, it is better to conduct small-scale trials first to avoid excessive losses or wasted effort.

Precautions: (1) It should be ensured that no adverse chemical reaction will occur between the mixed varieties, and that the efficacy or efficiency is normal, and the physical properties of the efficacy will not be affected.

2) After the mixed use of different pesticide varieties, it should be ensured that no drug damage will be caused to the crop.

3) Pay attention to the resistance effect between pesticide varieties to ensure the mixing effect.

Pesticide blending refers to the mixing of pesticides of different types and mechanisms of action to achieve better control effects. When mixing pesticides, the following ideas should generally be followed:

1.No mixing of similar chemicals: In order to avoid chemical reactions and adverse effects, pesticides of the same class should not be mixed. Hold it open.

2.Different types of pesticides are compatible with each other: two or more pesticides of different classes should be selected, and it is best to mix pesticides belonging to different mechanisms of action.

3.Properly control the amount of pesticides: because the mixture will increase the efficacy of the pesticides, reduce the amount of pesticides appropriately to avoid pesticide damage.

4.Pesticide selection according to pesticide use period, crop quality and other factors: different pesticides have different impacts on crops and agricultural environment, and should be reasonably selected according to actual needs.

In general, the quality of pesticide mixing depends on the specific application situation and method, and improper mixing will have a great negative impact on crops and the environment. Therefore, it is recommended that before the use of pesticides, priority should be given to factors such as the effect, use period, and risk degree of a single pesticide, and only in special circumstances can be mixed and used in an appropriate amount.

Whether it is open-field vegetables or greenhouse vegetables, pesticides are indispensable. Nowadays, it is difficult to do insecticide, sterilization using a single dose of pesticides, thereforeOnly a scientific and reasonable mixture of pesticides can play its greatest role. There are many benefits of reasonable mixing of pesticides, which can not only reduce the number of times to take medicine, but also improve the control effect, reduce the dosage, not to mention, but also reduce labor costs, and can play a role in long-term prevention and control, which can be said to be a powerful blow to pests and diseases.

The order of pesticide mixing must be accurate, and in principle, it is best not to mix more than 4 kinds of pesticidesBut in any case, there are many types of pesticides, and the order of baking is usually micro fertilizer, water soluble fertilizer, visible powder, water dispersible granule, suspension agent, micro emulsion, water emulsion, water agent, and emulsifiable concentrate. When adding various pesticides,Each one should be fully stirred evenly, so that each pesticide can be brought into play, and when pesticides are applied to crops, it can play its maximum effect.

Secondly,In the mixing of pesticides, his mixing principle must be kept in mind, first of all, when mixing pesticides with different toxic effects, it can bring good control effects to crops, and if it is mixed with different forms of pesticides, it can also completely eliminate various insect pests in the field, and the control effect can also be improved. If it is mixed with pesticides with different timeliness, its post-drug control effect is good, and the action time is also very long.

When sharing pesticides with crops, we should pay attention to the following aspectsFirst of all, biological pesticides can not be mixed with fungicides, because pesticide fungicides have a strong lethality for biological pesticides, and secondly, the water temperature can not be too low when configuring pesticides, and the water temperature is too low to make pesticides unable to fully dissolve, and the preparation of pesticides with live water is likely to destroy the suspension of the liquid medicine and precipitate, which will affect the medicinal properties of pesticides.

Rational mixing of pesticides is a technical taskEither way, its benefits are recognized by us.

What are the problems with the mixed use of pesticides?

In rural areas, it is common to see farmers mixing several bottles of pesticides for use. This is to improve the control effect, what are the problems of the mixed use of pesticides?

The first point is that according to the symptoms, it can be divided into acute toxicity and chronic toxicity. Chronic drug injury usually takes a long time to show symptoms of drug damage, such as affecting flower bud differentiation, deformities of organs such as leaves and fruits, short plants, and insufficient grains. The next crop after use can also be damaged by some medications.

For example, after the use of benzsulfuron on wheat, it can cause drug damage to the next crop, peanuts, peppers, watermelons, etc.

The second point is lumpy. For long-term storage of emulsions, the bottom of the bottle will have white crystalline precipitation or cloudiness. Soak the lotion bottle in 30-40 °C warm water, crystallize and dissolve after about 30 minutes, and return a clear liquid, indicating good quality.

If it does not dissolve, it indicates that the quality of the emulsion has changed and it cannot be used. If the emulsion becomes a non-flowing viscous liquid or soapy solid, it is proof that most of the solvent has evaporated and the quality has changed.

The third point is the change of emulsifying properties of emulsified oil. If there is emulsion at the top, sedimentation at the bottom, and delamination after 10 minutes, it means that the emulsion is damaged and cannot be used. Under alkaline conditions, some agents are prone to hydrolysis reactions or complex chemical changes, which will lead to damage to the original structure and drug!

Under acidic conditions, some drugs will undergo chemical reactions, resulting in their inactivation, which will reduce the efficacy and easily cause drug damage!

Fourth, it cannot be mixed with copper. Certain drugs react with copper preparations, resulting in loss of activity, reduced efficacy, and drug damage! Precipitate crystallization.

For long-term storage of emulsions, the bottom of the bottle will have white crystalline precipitation or cloudiness. Soak the lotion bottle in 30-40 degrees of warm water, crystallize and dissolve after about 30 minutes, indicating good quality and ready to use. If it does not dissolve, it indicates that the quality of the emulsion has changed and it cannot be used.

<>(1) The mixed use of pesticides must be clarified; The mixed use of pesticides must mainly achieve the objectives of improving efficiency, simultaneous treatment and expanding the control framework; If the above objectives cannot be achieved, no mixing is allowed.

(2) There will be no adverse chemical and physical changes after mixing pesticides, such as the agent will not decompose after mixing, the emulsion will not be damaged, and the suspension will not produce flocculation or a large amount of precipitation. Any drug that easily decomposes under alkaline conditions cannot be mixed with alkaline substances.

(3) After mixing, the mixed solution shall not cause harm to the drug in the culture; In drones, it cannot be mixed with each other, from injuries to drugs.

4) After mixing the product, the efficacy of the mixed liquid should be improved, at least not reduced, that is, the efficiency should be improved after mixing.

Symptomatic and timely medication, according to the types of sunflower diseases, insects and weeds and the occurrence of diseases, insects and weeds, the law of harm, the selection of different varieties of insecticides, different types of pesticides have different control effects on different control objects, before the use of drugs to carefully investigate diseases, plagues and weeds, the best prevention and control period, symptomatic medication, generally choose in the early stage of the occurrence of diseases, insects and weeds, to achieve timely prevention and control.

To ensure the technology and quality of pesticide application, high-quality spraying equipment must be used for pesticide application, and pesticides must be strictly weighed, which is an important part of the prevention and control of diseases, insects and weeds. Pesticides should be measured according to the "Pesticide Instruction Manual", and the dosage should not be increased at will, especially herbicides, so as not to leave residues, pollute the environment and agricultural products, do not use a single pesticide for a long time, scientifically and reasonably deploy pesticides, and delay the development of resistance to pests and weed drugs.

Take care of safe medications. Ensure safe drug collection and scientific drug use to avoid human and animal poisoning. Pay attention to clean the pesticide application equipment and avoid using clean water.

Currently, some of the herbicides used in production are very effective. Because a pesticide remains in the application equipment or the water in which the product solution is prepared, it is easy to cause damage to sensitive crops due to the contamination of a certain pesticide.

To choose the appropriate proportion to proportion, no chemical reaction can occur, pay attention to their own protection of the amount of pesticides should not be too high, the concentration of pesticides should not be too high, when using mixed pesticides, do not cause too much damage to crops, these are the problems that need to be paid attention to.

You should pay attention to the medicinal properties, but also pay attention to the brand, because some medicines may cause great impact and harm if they are mixed together, which may not have any medicinal properties.