In the prevention and control of pests and diseases, a single dose gradually fades out of the historical stage, in order to increase the effect of prevention and treatment, the mixed use of pesticides has been promoted and applied.
The rational mixing of pesticides can improve the control effect, delay the development of resistance to pests and diseases, improve the control effect, reduce the dosage, and prevent the use of pesticides for different pests and diseases to reduce the number of applications, thereby reducing labor costs.
Pesticide mixing order
1 The order of pesticide mixing should be accurate. The order of foliar fertilizer and pesticides is usually: micro-fertilizer, water-soluble fertilizer, wettable powder, water-dispersible granules, suspending agent, microemulsion, water emulsion, water, and emulsifiable concentrate. (In principle, do not mix more than three pesticides
2 After adding water and adding medicine, for the second dilution and mixing, it is recommended to add half a bucket of water to the sprayer, and then add the first pesticide and mix. Then, dilute the remaining pesticides with a plastic bottle, dilute them, pour them into the sprayer, mix them, and so on (if you want to work well, don't be lazy).
3 No matter what kind of medicine is mixed, you should pay attention to "currently available, not suitable for a long time." Although the drug solution does not respond when it is just dispensed, it does not mean that it can be left for a long time, otherwise it will easily produce a slow reaction and gradually reduce the drug effect.
Principle of pesticide mixture
â— Mixing pesticides with different poisoning mechanisms
Mixing pesticides with different action mechanisms can improve the control effect and delay the development of resistance to pests and diseases.
â— Mixing pesticides with different poisoning effects
Insecticides have contact, stomach, fumigation, and internal absorption. The fungicides have protective, therapeutic, and systemic effects. If these drugs with different control effects are mixed, they can complement each other and produce good results. Control effect.
â— Mixing insecticides for different insect states
The combination of insecticides acting on different insect states can kill various pests in the field and kill the insects thoroughly, thereby improving the control effect.
â— Mixing pesticides with different aging
Some kinds of pesticides have good effect of quick-acting control, but the duration of effect is short; some quick-acting effects are poor, but the action time is long. The combination of such pesticides not only has good control effect after application, but also plays a long-term prevention and treatment role.
â— Mixed with synergists
Synergists have no direct toxicity to pests and diseases, but they can improve the control effect when mixed with pesticides.
â— Mixing pesticides for different pests and diseases
When several pests and diseases occur at the same time, this method can reduce the number of spraying and reduce the working time, thereby improving the efficiency.
Precautions for mixing pesticides
Although there are many advantages to mixing pesticides, it is forbidden to mix them at random. Unreasonable mixing is not only useless, but also has the opposite effect. Pay attention to the following points when mixing pesticides.
â— Does not change physical properties
That is to say, after mixing, there is no occurrence of oil slick, flocculation, sedimentation or discoloration, and no occurrence of heat generation or bubble generation. If the same powder, or the same granules, fumigants, aerosols, generally can be mixed;
Between different dosage forms, such as wettable powder, emulsifiable concentrate, concentrated emulsion, suspension, water solvent and the like, the liquid agent is not suitable for mixing.
â— Does not cause chemical changes
1 includes many agents can not be mixed with alkaline or acidic pesticides, under alkaline conditions such as Bordeaux mixture, stone sulfur mixture, carbamate, pyrethroid insecticide, thiram, dexame ring and other dithio amino groups Formic acid fungicides are prone to hydrolysis or complex chemical changes that destroy the original structure.
2 Under acidic conditions, 2,4-D sodium salt, 2 methyl 4-chloro sodium salt, amitraz and the like are also decomposed, thereby reducing the drug effect.
3 In addition to acid and alkali, many pesticide varieties cannot be mixed with drugs containing metal ions.
4 dithiocarbamate fungicides, 2,4-D herbicides mixed with copper formulations can produce copper salts to reduce the efficacy.
5 thiophanate-methyl and thiophanate can be complexed with copper ions and lose their activity.
6 Remove copper preparations, other preparations containing heavy metal ions such as iron, zinc, manganese, nickel, etc., should be used with caution.
The combination of 7 stone sulphur and Bordeaux mixture can produce harmful copper sulphide and also increase the soluble copper ion content.
8 Enemy, butachlor and the like can not be mixed with organophosphorus and carbamate insecticides, and some chemical changes may cause phytotoxicity.
â— Pesticides with cross-resistance should not be mixed
For example, the fungicide carbendazim and methyl thiophanate have cross-resistance. Mixing not only does not delay the development of resistance to pathogens, but accelerates the development of drug resistance, so it cannot be mixed.
â— Biopesticide cannot be mixed with fungicides
Many pesticide fungicides are lethal to biological pesticides. Therefore, microbial pesticides and fungicides cannot be mixed.
Pesticide mixed formula sharing
1, Kung Fu + imidacloprid or acetamiprid can prevent green blind mites.
2, avermectin + 44% propanol, used on rice to control rice vertical and aphids, economical.
3, a vitamin salt + tebufenozide, can be used for the control of noctuidae pests, long-lasting effect.
4, thiamethoxam, dinotefuran granules, become a new component to prevent small insects.
5, dinotefuran + kungfu, prevention and control of whitefly is efficient and effective.
6, Kung Fu + profenofos public formula, for the special effects of underground pests.
7, a vitamin salt + killing urea, control rice leaf roller leafhopper, fruit tree heartworm.
8, Avi · insecticide single + sulphate, old formula: against various pests of rice.
9, chlorpyrifos + triazophos, can prevent rice borer (partially disable triazophos).
10, Avi + chlorantraniliprole + ethidine pyridone, rice full formula.
11. Alkidine pyridone + butyl sulphide / imidacloprid / chlorpyrifos, peach tree resistant mites have a good effect.
12, spirotetramat + avermectin, the effect of pear hibiscus is very good.
13, Omethoate + fenvalerate, the effect of killing wheat aphids is not good.
14, prochloraz + iprodione, control leaf leaf spot, anthracnose effect is great.
15. Organic copper preparation + benzomethine + iodine solution is effective for controlling cucumber target spot disease.
16, avermectin + spirotetramat, anti-white meal, aphids, thrips absolutely no problem.
17, a vitamin salt + insect nitrile, insects double kill.
18, buprofezin / chlorpyrifos + spirotetramat, resistant to scale insects, safe and efficient.
19, enoylmorpholine + polyclonal anti-manganese zinc, prevention of white rust in water spinach, downy mildew of melon, dry spots for three days.
20, a vitamin salt · hexaflumuron + chlorocyanide, hit the fruit tree heartworm, the effect is good.
21, anti-fond mildew, epidemic conventional agents + organic copper preparations, the control effect increased by more than 50%.
22, fluorosilazole + organic copper, smeared with vines, the healing effect is good.
23, insecticide single + chlorpyrifos, kill ginger and heartworm effect lever.
24, refined A · carbendazim / refined A · azoxystrobin + organic copper, prevention of root diseases.
25, Shen Xiamycin + well wax bud, treatment of melon blight and blight.
26, Qi Ling + thiamethoxam, hit the jump bar and drop.
27, Avi + chlortetracycline, hit the leaf miner.
28, oxyfluorfen + pendimethalin, garlic field to seal the grass, He broad double, the best combination.
29. Thiamethoxam + bifenthrin, root can be used to control mantle and earthworms.
30, Captan + Bacillus subtilis, to solve the disease of repeated ticks.
31, chlorantraniliprole + chlorpyrifos, prevention and treatment of rice stem borer is very good.
32, a vitamin salt + tebufenozide, playing beet, noctuid spodoptera, a good effect.
33, hydrazinemycin + carbendazim / methyl sulfide - carbendazim, roots to prevent root diseases.
34, pyriazine and tirafuramide, to prevent citrus resin disease (sand disease) long-lasting period.
35, Avi + 哒螨 Ling / triazolium tin + biphenyl acid fat, treatment of fruit trees high resistance red and white spiders.
More pesticide knowledge , please pay attention to China Pesticide Network
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