Pesticide blending strategy, remember to "disorder"
Crop pest control can not be separated from pesticides, then pesticides in the prevention and control of pests and diseases, sometimes the role of a single species is very small, many farmers in order to increase the effectiveness of control and achieve the role of concurrent treatment, the pesticides are mixed, then the pesticide will not lose What is the effect? ​​In fact, pesticides can be mixed, as long as the matching scheme is accurate, the effect will be more effective.
The rational use of pesticides can enhance the prevention and treatment, delay the onset of pests and diseases, prevent the mixing of pesticides with different pests and diseases, and reduce the cost. However, if it is used indiscriminately, the drug will not be effective, and the drug will be aggravated.
First, the 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, leeches, suspension, microemulsion, water emulsion, water, emulsifiable concentrate. Add one immediately after each addition, and then add the next one.
2, first add water and then add medicine, it is recommended to first inject a large bucket of water into the sprayer, add the first pesticide and mix. Then add another agent to mix, and so on.
3, regardless of the mix of drugs should pay attention to "now 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 placed at will for a long time. Otherwise, it is easy to have a slow reaction and the drug effect is gradually reduced.
Second, pesticide mixing guidelines
1. Mixed pesticides with different poisoning mechanisms. Mixing pesticides with different action mechanisms can enhance the prevention and treatment and delay the resistance of pests and diseases.
2. Mixed pesticides with different poisoning effects. Insecticides include contact, stomach poisoning, fumigation, and systemic absorption. The fungicides have protective, therapeutic, and systemic effects. It is assumed that these agents with different control effects can be used to make up each other and will play a great role. Prevention and treatment.
3. Mixing insecticides that act on different insect states. The combination of insecticides acting on different insect states can kill the beneficial insects of various insect states in the field, kill the insects thoroughly, and then advance the prevention and treatment.
4. Mixed pesticides with different quick-acting properties. Some varieties 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 prolongs the period of protection.
5. Mix with synergist. Synergists have no indirect toxicity to pests and diseases, but they can enhance the prevention and treatment by mixing with pesticides.
6. Mix pesticides that act on different pests and diseases. When several pests and diseases occur together, this method is used to increase the number of spraying and enhance the effectiveness.
Third, the precautions for the mixed use of pesticides
Although there are many advantages to mixing pesticides, it is forbidden to mix them at random. Unreasonable mixing can not only achieve the desired effect, but also lead to the opposite effect. Mix the pesticides and pay attention to the following points.
1. After mixing, there should be no oil slick, flocculation, sedimentation or discoloration, and there should be no occurrence of heat or bubbles. It is assumed that the same powder, or the same granules, fumigants, aerosols, can generally be mixed;
2, between different dosage forms, such as wettable powder, emulsifiable concentrate, thick emulsion, suspension, water solvent, etc., water should be used as a medium.
3, 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 cluttering chemical changes and then destroy the original structure.
2 Under acidic conditions, 2,4-D sodium salt, 2 methyl 4-chlorosodium salt, and metformin may also differentiate, thereby reducing the efficacy.
3 In addition to acid and alkali, many pesticide varieties cannot be mixed with metal ion-containing drugs.
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 to obtain activity.
6 Remove the copper preparation, other preparations containing heavy metal ions, such as iron, zinc, manganese, nickel and other preparations, pay special attention when mixing.
7 stone sulfur mixture mixed with Bordeaux mixture can attack harmless copper sulfide, and also add soluble copper ion content.
8 Enemy, butachlor and the like can not be mixed with inorganic phosphorus and carbamate insecticides, and some chemical changes can cause phytotoxicity.
4. Pesticides with cross-resistance should not be mixed
For example, the fungicide carbendazim and methyl thiophanate have cross-resistance. Mixing not only does not inhibit the onset of pathogens, but inhibits drug resistance, so it cannot be mixed.
5, biological pesticides can not be mixed with fungicides
Many pesticide fungicides are lethal to biological pesticides, and therefore microbial pesticides and fungicides cannot be mixed.
The above is the pesticide blending strategy for pesticide manufacturers for everyone, I hope to help everyone, reasonable compounding can make the drug play its biggest role.
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