Protective fungicides: These fungicides protect the application site that is not infested by pathogens from pathogens. It is necessary to spray the drug before it is exposed to the disease or disease, such as copper preparations. Bordeaux solution), sulfur preparation (stone sulphur mixture), mancozebium and the like.
Exterminating fungicides: These agents can directly kill pre-invasive bacteria and treat infected areas that are already infested, often with disinfection. For example, use formalin to disinfect the carrier seeds.
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.
Different types of fungicides are used differently.
System protection in seedling stage: including soaking seeds, liquid medicine, seed dressing, seed coating, and liquid soaking seedlings. Commonly used agents are seed dressing double, Fumei double. Seedlings include seeds, roots, tubers, bulbs, cuttings, seedlings, seedlings and other organs for reproduction.
Phytochemical treatment of soil: It is a whole or partial protection, such as pentachloronitrobenzene applied directly in the seedbed soil. The soil can be treated by watering, tumbling, and the like.
Foliar spray: Foliar spray can be applied in a variety of dosage forms, such as powders, micro-powders, wettable powders, emulsifiable concentrates, suspensions, liquids, aerosols, and the like.
Are all kinds of fungicides used correctly?
The requirements for the use of fungicides are higher than for pesticides, so it is more difficult to master. According to the role of pesticides in disease prevention and control, fungicides are generally divided into three categories:
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