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Classification of fungicides: Bactericides are agents that inhibit or kill fungi, bacteria, or diseases. They can be classified according to their nature and function:
1. Protecting agent Before the germ reaches the host plant or has not invaded the host, it is applied to the surface of the plant to prevent the spores from germinating or killing the spores that are germinating, so as to protect the plants from the germs. Such as Bordeaux mixture, Desen zinc, antibacterial, etc., generally non-water-soluble, able to withstand weather and erosion and longer lasting protection.
2. Exterminants After the onset of the plant, the surface of the plant is applied to kill the fungi that have entered the surface of the host, but most of the bacteria are still on the surface of the host. For example, the powdery mildew is controlled by sulfur. Scavengers are mostly used in crop dormancy. If the tree is used in winter, the whitening agent or high concentration of stone sulphur is used to kill the overwintering bacteria. Some eradication agents can also be used in agricultural tools and soil disinfection to kill the bacteria and nematodes, such as Fuer. Marin and so on.
3. The systemic bactericidal agent can penetrate into the inside of the tissue through the plant epidermis, and it can diffuse or produce metabolites along with the transduction in the plant rest to protect the plants from the pathogens or to treat diseases such as wilting and benzene. Teto, Tobuzin, etc. These agents are resistant to rain and are effective against deep pathogens, but are also susceptible to pathogen resistance.
4. Antibiotic fungicides Use metabolites of some fungi to kill or inhibit other fungi. Also known as biological agents, such as quercetin, cerulein and so on.
According to the classification of the above fungicides, in the process of fruit tree cultivation and management, we must analyze various diseases on the fruit trees, carefully select various fungicides according to the purpose of prevention and control, time of prevention and treatment, and seasons to achieve fruit tree disease agents. The purpose of prevention and control.
Classification and role of common fungicides in fruit trees
In the process of fruit tree cultivation and production management, we often use a variety of fungicides when we are dealing with various diseases of fruit trees. Understanding and understanding the classification and role of fungicides will be of great help to the selection and use of fruit tree disease control agents in the future.
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