The principle of mixed use of pesticides, the knowledge of mixed use of pesticides!

In the prevention and control of diseases and insect pests, the single agent gradually faded out of the stage of history, in order to increase the control effect to achieve the effect of simultaneous treatment, the mixed use of pesticides has been promoted and applied. The reasonable mixed use of pesticides can improve the control effect, delay the resistance of diseases and pests, improve the control effect, reduce the dosage of pesticides, control the mixed use of pesticides of different diseases and pests, and reduce the frequency of application, thus reducing the labor cost.

Pesticide mixing sequence

1. The mixing order of pesticides should be accurate, and the mixing order of foliar fertilizer and pesticides is usually as follows: micro-fertilizer, water-soluble fertilizer, wettable powder, water dispersible granule, suspending agent, microemulsion, water emulsion, EC (in principle, no more than three kinds of pesticides are mixed). Each addition is fully stirred and mixed, and then the next one is added.

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

3. No matter what kind of medicine is mixed, we should pay attention to "present use, not for a long time". Although the liquid does not react when it is just prepared, it does not mean that it can be kept at will for a long time, otherwise it is easy to produce a slow reaction and gradually reduce the efficacy.

Principle of mixed use of pesticides

Mixed use of pesticides with different poisoning mechanisms. The mixed use of pesticides with different mechanisms can improve the control effect and delay the resistance of diseases and insect pests.

Mixed use of pesticides with different toxic effects. Insecticides have contact, stomach poison, fumigation, internal inhalation and other functions, while fungicides have protection, treatment, internal inhalation and other functions. If these chemicals with different control effects are mixed, they can complement each other and produce a good control effect.

Mixed use of insecticides acting on different insect states. The mixed use of insecticides acting on different insect states can kill all kinds of insect pests in the field and kill them thoroughly, so as to improve the control effect.

Mixed use of pesticides with different ages. Some kinds of pesticides have good quick-effect control effect, but the duration is short; some kinds of quick-effect control effect is poor, but the action time is long. The mixed use of such pesticides can not only have a good control effect after application, but also play a role in long-term control.

Mixed with a synergist. Although synergist has no direct toxic effect on diseases and insect pests, it can improve the control effect when mixed with pesticides.

Pesticides that act on different diseases and insect pests. When several kinds of diseases and insect pests occur at the same time, the use of this method can reduce the number of spraying, reduce the working time, and improve the efficiency.

Matters needing attention in mixed use of pesticides

Although the mixed use of pesticides has many advantages, do not mix it at will. Unreasonable mixing is not only useless, but also has the opposite effect. The mixed use of pesticides should pay attention to the following points.

Do not change the physical properties

That is, after mixing, there can be no oil slick, flocculation, precipitation or discoloration, nor can there be heat, bubbles and other phenomena. If they are both powders, or granules, fumigants or fumigants, they can generally be mixed.

Different dosage forms, such as wettable powder, EC, concentrated emulsion, gel suspension, water solvent and so on, should not be mixed arbitrarily.

Does not cause chemical change.

1. Including many agents can not be mixed with alkaline or acidic pesticides, under alkaline conditions such as Bordeaux solution and stone-sulfur mixture, carbamate and pyrethroid insecticides, dithiocarbamate fungicides such as thiram and dithiocarbamate are prone to hydrolysis or complex chemical changes, thus destroying the original structure.

two。 Under acidic conditions, 2mae 4murD sodium salt, 2methyl 4chloride sodium salt and diformamidine also decompose, thus reducing the efficacy.

3. In addition to acidity and basicity, many pesticides cannot be mixed with drugs containing metal ions.

4. The mixture of dithiocarbamate fungicides, 2mae4 murine class D herbicides and copper preparations can produce copper salts to reduce the efficacy.

5. Thiophanate methyl and thiophanate can be complexed with copper ion and lose their activity.

6. Except for copper preparations, other preparations containing heavy metal ions, such as iron, zinc, manganese, nickel and other preparations, should be used with special caution.

7. The mixture of stone sulfur mixture and Bordeaux solution can produce harmful copper sulfide and increase the content of soluble copper ions.

8. Paspalum and butachlor can not be mixed with organophosphorus and carbamate insecticides, and some chemical changes may cause drug damage.

Pesticides with cross resistance should not be mixed.

For example, fungicides carbendazim and methyl topiramate have cross-resistance. Mixed use not only can not delay the emergence of drug resistance, but will accelerate the emergence of drug resistance, so it can not be mixed.

Biological pesticides should not be mixed with fungicides

Many pesticide fungicides are lethal to biological pesticides, so microbial pesticides and fungicides can not be mixed.

Sharing of mixed formulations of pesticides

1. Kung fu + imidacloprid or acetamiprid can prevent green bug bugs.

two。 Avermectin + 44% propyl chloride is used in rice to control rice stem borer and borer, which is economical.

3. Methamidyl salt + tebufenozide can be used for the control of night moth pests for a long time.

4. Thiazide and furosemide granules have become new ingredients to prevent insects.

5. Furosemide + kung fu, high and lasting effect in the control of whitefly.

6. Kung Fu + probophos popular formula, special effect for underground pests.

7. Metamitoxin + thiazuron is used to control rice leaf roller and fruit tree heart borer.

8. Methamidone + isocarbophos, the old formula-for all kinds of rice pests.

9. Chlorpyrifos + triazophos can prevent rice heart worms (triazophos is prohibited in some areas).

10. Awei + chlorobenzamide + enantiopymione, rice full-beat formula.

11. The resistance of peach trees to aphids was very good with enantiomide + butylthio-imidacloprid / chlorpyrifos.

twelve。 The effect of snail ethyl ester + avermectin on pear planthopper is very good.

13. Omethoate + fenvalerate is effective in killing wheat aphids and the price is not high.

14. Prochloraz + iso-carbamide is very effective in controlling leaf spot and anthracnose of leafy vegetables.

15. Organic copper preparation + benzimide + iodine solution is economical and economical for the control of cucumber target spot disease.

16. Avermectin + snail ethyl ester, control whitefly, aphids, thrips absolutely no problem.

17. Tocopherol + acaronitrile, insecticidal and mites.

18. Buprofezin / chlorpyrifos + snail ethyl ester, resistant to scale insects, safe and efficient.

19-enoylmorpholine + multi-antibody manganese zinc to control white rust of hollow vegetable, downy mildew of melon, and dry spot for three days.

20. Methylvitamin salt fluorocarbamide + cyanogen chloride, beating fruit tree heart-eating insects, the effect is good.

21. The control effect of conventional agents for preventing downy mildew and epidemic disease plus organic copper preparation is increased by more than 50%.

twenty-two。 Flusilazole + organic copper, smeared melon vine blight, the healing effect is good.

23. Insecticidal order + chlorpyrifos, kill ginger heart worm effect lever.

24. Dimethrin / azoxystrobin + organic copper to control root diseases.

25. Shenzinmycin + well wax bud to treat melon vine blight and Fusarium wilt.

twenty-six。 Dacarine + thiazide, jump nail lever drop.

twenty-seven。 Avi + melamine, fight leaf moth.

twenty-eight。 Ethoxyfluoxane + pendimethalin, forbidden grass in garlic field, double weeds, the best combination.

twenty-nine。 Thiazide + bifenthrin, root irrigation to control ground maggots and leek maggots.

thirty。 Carbendan + Bacillus subtilis to solve the disease of continuous cropping.

thirty-one。 Chlorobenzamide + chlorpyrifos is effective in controlling Chilo suppressalis.

thirty-two。 Methylvitamin salt + tebufenozide, beet, Spodoptera litura, Spodoptera litura is effective.

thirty-three。 Chlorphenicol hydrate + carbendazim / methanesulfin was used to control root diseases.

thirty-four。 Pyrazolyl thiofuramide can prevent citrus resin disease (sand skin disease) for a long time.

thirty-five。 Avi + pyridabine / triazotin + biphenyl well fat was used to treat red and white spiders with high resistance to fruit trees.