The requirements for the use of fungicides are higher than for pesticides, so it is more difficult to master. Therefore, when using fungicides, it is necessary to master the following principles in order to receive good results.
1. Know what major diseases may occur in the crop. In this way, the right medicine can be achieved. Because different types of fungicides have different properties, characteristics and modes of action, there is no "universal medicine".
2. Know the action properties of the fungicide. According to the role of drugs in disease prevention and control, they are generally divided into three categories:
Protective fungicides: These kind of microbial agents can protect the application site that is not infested by pathogens, and are protected from pathogens. It is necessary to spray the drug before the crop is exposed to the disease or disease, such as copper. Formulation (Bordeaux solution), sulfur preparation (stone sulphur), mancozeb, desen zinc, and the like.
Exterminating fungicides: These agents directly kill pre-invasive bacteria and treat infected areas where they are infested. They are often disinfected and rarely used directly on crops. If formalin is used to disinfect the bacteria, the powder rust is used to eradicate wheat stripe rust and powdery mildew.
Therapeutic fungicides, also known as systemic fungicides: These fungicides are absorbed and transmitted by plants to prevent the development of pathogens in various parts of the plant. Such as carbendazim, thiophanate, chunleimycin and so on.
3. Different methods of using pesticides are also different.
1 seedling stage system protection: including liquid soaking, liquid medicine, seed dressing (dry mix, wet mix), seed coating, liquid soaking seedlings, etc. Commonly used agents are seed dressing double, Fumei double. Seedlings include seeds, roots, tubers, bulbs, cuttings, seedlings, seedlings and other organs for reproduction.
2 chemicals to treat the soil. It is a whole or partial protection, such as pentachloronitrobenzene and chloropicrin, which are directly applied to the seedbed soil. The following methods can be used to treat the soil: watering method (water-soluble liquid, about 5 kg per square meter); plowing or furrow application; turning-mixing method (applying the agent to the soil surface, then plowing the soil) , the medicine is turned into the soil surface); the injection method (using a soil syringe, applied to the soil according to a certain dose and pore distance), and the like.
3 foliar spray; leaf surface sprayed with a variety of dosage forms, such as powder, micronized powder, wettable powder, emulsifiable concentrate, suspending agent, water, aerosol, and the like.
1. Know what major diseases may occur in the crop. In this way, the right medicine can be achieved. Because different types of fungicides have different properties, characteristics and modes of action, there is no "universal medicine".
2. Know the action properties of the fungicide. According to the role of drugs in disease prevention and control, they are generally divided into three categories:
Protective fungicides: These kind of microbial agents can protect the application site that is not infested by pathogens, and are protected from pathogens. It is necessary to spray the drug before the crop is exposed to the disease or disease, such as copper. Formulation (Bordeaux solution), sulfur preparation (stone sulphur), mancozeb, desen zinc, and the like.
Exterminating fungicides: These agents directly kill pre-invasive bacteria and treat infected areas where they are infested. They are often disinfected and rarely used directly on crops. If formalin is used to disinfect the bacteria, the powder rust is used to eradicate wheat stripe rust and powdery mildew.
Therapeutic fungicides, also known as systemic fungicides: These fungicides are absorbed and transmitted by plants to prevent the development of pathogens in various parts of the plant. Such as carbendazim, thiophanate, chunleimycin and so on.
3. Different methods of using pesticides are also different.
1 seedling stage system protection: including liquid soaking, liquid medicine, seed dressing (dry mix, wet mix), seed coating, liquid soaking seedlings, etc. Commonly used agents are seed dressing double, Fumei double. Seedlings include seeds, roots, tubers, bulbs, cuttings, seedlings, seedlings and other organs for reproduction.
2 chemicals to treat the soil. It is a whole or partial protection, such as pentachloronitrobenzene and chloropicrin, which are directly applied to the seedbed soil. The following methods can be used to treat the soil: watering method (water-soluble liquid, about 5 kg per square meter); plowing or furrow application; turning-mixing method (applying the agent to the soil surface, then plowing the soil) , the medicine is turned into the soil surface); the injection method (using a soil syringe, applied to the soil according to a certain dose and pore distance), and the like.
3 foliar spray; leaf surface sprayed with a variety of dosage forms, such as powder, micronized powder, wettable powder, emulsifiable concentrate, suspending agent, water, aerosol, and the like.
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