Methods and precautions for rational mixing of pesticides

Due to the wide variety of pests and diseases, in order to improve the control effect and reduce the number of artificial inputs and use of sprayed pesticides, we have basically become accustomed to the use of various types of pesticides or mixed with foliar fertilizers , plant conditioners and other items.

For some pesticides, reasonable mixing or compounding can prolong the efficacy period, delay the resistance of pests and diseases, and improve the control effect;

However, there are many pesticides that are not suitable for mixing and mixing due to the difference in pH or the mechanism of insecticidal sterilization. In practice, the following four principles must be followed. First, the chemical stability of the active ingredients cannot be affected, and no side effects are produced after compounding. Second, the physical properties of the agent cannot be destroyed, and there is no delamination, flocculation or precipitation after compounding. Third, pesticide compounding should generally be lower than the cost of single use. Fourth, the use of pesticides is clear and targeted.

Especially for those friends who mix and match pesticide formulas, if they are used carelessly, they will even cause crops to be produced!

Today, I would like to talk to you about the precautions for mixing and mixing pesticides. For your reference.

Matters needing attention when using pesticides

1. The order of addition of pesticides and foliar fertilizers

Micro-fertilizer → water-soluble fertilizer → wettable powder → water-dispersible granules → suspending agent → microemulsion → water emulsion → water agent → emulsifiable concentrate.

2. Types of fertilizers that cannot be mixed with pesticides

Tobuzin, Jinggangmycin, Yeqisan, Kuweiwei, etc. can not be mixed with ammonium bicarbonate, ammonia water, grass ash, lime nitrogen, etc.;

Alkaline pesticides such as stone sulphur mixture, Bordeaux mixture and rosin tablet can not be mixed with fertilizers such as calcium phosphate, calcium superphosphate, ammonium sulfate, ammonium nitrate and ammonium chloride. The arsenic-containing pesticides cannot be combined with sodium salts and potassium salts. Mixed.

3. Principles of pesticide mixing and liquid preparation

Generally speaking, most of the pesticides will react chemically or physically after mixing. When using pesticides, it is best not to add more than three pesticides in sequence.

Moreover, after each pesticide is added, it should be thoroughly stirred and mixed to make a liquid medicine, and after observing no obvious turbidity, discoloration, sedimentation, bubbling, flocculation, etc., the next pesticide is added again for mixing. Liquid preparation.

Pesticide can not be mixed with pesticides

1. Mix and match is prone to phytotoxicity

The antibacterial WP cannot be mixed with the parathion emulsion;

Enemy and chlorpyrifos should not be mixed with organophosphate insecticide, fungicide or carbamate killing agent, nor can they be used one after another;

Enzymes and multiple fruits must not be mixed with emulsion pesticides;

The cockroach manganese equivalent drug can not be mixed with the sensen zinc, the daisen ring, etc.;

Enemy killing should not be mixed with organophosphorus pesticides;

Benzimidazole pesticides cannot be mixed with copper-containing pesticides;

Bordeaux mixture can not be mixed with stone sulfur mixture;

Organophosphorus pesticides should not be mixed with the rosin mixture.

2. Mixing is easy to neutralize or lose efficacy

Acidic pesticides such as copper sulfate, sodium fluorosilicate, chalk, and superphosphate cannot be mixed with alkaline fertilizers such as rosin mixture, stone sulphur, Bordeaux, aluminum arsenate, soap, lime, and lime nitrogen.

When acid-base pesticides are mixed together, they will decompose and destroy, reduce the efficacy, and even cause phytotoxicity;

Further, dimethoate, fenitrothion, malathion, ammonium phosphate, and most organophosphate insecticide and pesticide kasugamycin, validamycin, blasticidin-like portion of the micro biological pesticides, can not be mixed and matched with alkaline pesticides .

3. Mix and match pesticides of different categories

Water-soluble drugs such as wettable powders, emulsifiable concentrates, concentrated emulsions, suspensions, and aqueous solvents are generally not used in combination; and granules, fumigants, and aerosols are mostly used in combination;

4. Heavy metal drug mix and match

Dithiocarbamate fungicides, 2,4-D herbicides , thiophanate-methyl, thiophanate-like drugs, etc., can not be mixed with copper ions and copper preparations;

And cautiously mix and match with iron, zinc, manganese, nickel and other preparations.

5. Other non-mixable drugs

Carbendazim cannot be mixed with methyl ketone, and microbial pesticides should not be mixed with bactericide drugs.

Mix and match suggestions:

Mixing of different pesticides : The main method is the mixing of organic phosphorus and organic phosphorus, such as methyl parathion or ethyl parathion mixed with trichlorfon, or four enemy powders or enemy enemies. Mixture of insects and malathion, such as enemy horses; compounding of organic phosphorus and pyrethroids, such as omethoate, dimethoate and pyrethroid mixed with omethoate and fenvalerate Chrysanthemum, etc.; the mixture of carbamate and organic phosphorus, such as leaf emulsifiable concentrate of leaf mash and marathon, mixed with carbofuran and granule granules; organic nitrogen mixed with carbamic acid With the two-speed wettable powder such as insecticidal double and quick-killing.

Different fungicides are compounded: the main method is to mix the systemic therapeutic fungicide with the protective fungicide. After being absorbed by the plant body, the systemic fungicide can be transported to various parts of the plant body to kill the bacteria in the plant. The protective fungicide remains on the surface of the plant to prevent the invasion of pathogens. For example, dystrophic Mn-Zn is a mixture of systemic therapeutic ruthenium and protective mancozeb; mixed carbendazim is a mixture of carbendazim and Jinggangmycin; The mixture is made up of carbendazim and thiram.

Different herbicides: the main method is to mix long-lasting herbicides with short-lasting herbicides, or internally-conducting herbicides with contact herbicides, and insecticides. Complementary complementary agents such as monocotyledonous herbicides and dicotyledonous herbicides, herbicides that kill broadleaf weeds, and herbicides that kill grass weeds, and the like. For example, butachlor has a good effect on controlling most of the annual grass weeds, but the effect of controlling broadleaf weeds such as ragweed and kohlrabi is not obvious, while the effect of Xicaojing on broadleaf grass is high. The mixture of Dingxi Granules can be used to achieve the same effect. In addition, the compounding effect is better, such as chlorpyrifos plus dimethyltetrachloride, herbicide ether plus dimethyltetrachloride, chlorpyrifos plus dimethyltetrachloride, chlorpyrifos plus diuron, and green merlonga chlorpyrifos Fluorine Glycol, paraquat, simazine and so on.


When using pesticides, be sure to use them in strict accordance with the instructions for use. Do not blindly increase the dosage and concentration. Do not mix and use the formula to avoid unnecessary losses.

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