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Fungicides Method Of Operation
Sep 15, 2017

Fungicides, also known as biocides, bactericidal algicides, microbicides, etc., usually refers to the effective control or kill the water system of microorganisms - bacteria, fungi and algae chemical agents.

Main species

Fungicides, also known as biocides, bactericidal algicides, microbicides, etc., usually refers to the effective control or kill the water system of microorganisms - bacteria, fungi and algae chemical agents. Mainly divided into two kinds of agricultural fungicides and industrial fungicides.

Agricultural fungicides

Is a class of pesticides used to control plant diseases caused by various pathogenic microorganisms, generally referred to as fungicides. But the international community, usually as a control of various types of pathogenic microorganisms in general. With the development of fungicides, but also distinguish between the killing agent, kill the virus, algae and other subclass.

Industrial fungicides

In accordance with the sterilization mechanism can be divided into two kinds of oxidizing fungicides and non-oxidizing fungicides. Oxidative fungicides are usually strong oxidants, mainly through the bacteria with the metabolism of enzymes in the body to achieve the purpose of sterilization. Commonly used oxidizing fungicides are chlorine, chlorine dioxide, bromine, ozone, hydrogen peroxide and so on. Non-oxidizing fungicides are in the form of toxic agents in the special parts of microorganisms, thereby destroying microbial cells or living body to achieve bactericidal effect, common non-oxidizing fungicides are chlorophenols, isothiazolinones, quaternary ammonium salts Wait.

Fungicides by source, in addition to agricultural antibiotics are biogenic fungicides, the main varieties are chemical synthesis of fungicides, fungicides is a class of drugs used to control plant diseases. Any medicine that kills or inhibits the growth of pathogens, but does not prevent the normal growth of plants, collectively referred to as fungicides. Fungicides can be classified according to the mode of action, the source of raw materials and the chemical composition.

According to the use of fungicides classification

The protective agent treats the plant or the surrounding environment with the agent before the pathogenic microorganism has no contact with the plant or is not immersed in the plant, to inhibit the spore germination or kill germ spores to protect the plant from harm, which is called protection effect. The agent having such a function is a protecting agent. Such as Bordeaux liquid, on behalf of the zinc, copper sulfate, green milk copper, mancozeb, chlorothalonil and so on.

The therapeutic agent pathogenic microorganisms have been immersed in the plant, but the plant is in a latent period. Drugs from the plant epidermis into the plant tissue, the transmission, proliferation, or produce metabolites to kill or inhibit pathogens, so that the disease is no longer affected, and to restore health. An agent having such a therapeutic effect is called a therapeutic agent or a chemotherapeutic agent. Such as methyl thiophanate, carbendazim, juniperin and so on.

The eradication agent refers to the plant disease after the application of drugs can directly kill the invasive plant pathogens. The agent having such a reducing action is a scavenger. Such as the United States arsenic, sodium pentachlorophenate, stone sulfur mixture.

Method of operation

There are many ways to use fungicides, each using methods are based on the law of disease design. Common use of the main methods are: on the field of ground crops spraying, soil disinfection and sterilization of three kinds.

For the field crop spraying, the factors that affect the field effect of fungicide is nothing more than pharmaceutical, environmental, crop three aspects, but the fungicide in the application of pesticides and herbicides than the application of technical requirements higher, especially To fully understand the occurrence and development of disease law, because the occurrence and development of diseases such as pests and weeds as at a glance.

Spraying on field crops should pay attention to two points: the first is the type and concentration of pharmaceuticals. The choice of the type of pharmacy depends on the type of disease, so the first to make the correct type of disease diagnosis, and then to the right medicine. Such as rice blast can be selected rice blast net, rice blast Ling, tricyclazole and so on, wheat powdery mildew, rust to choose triadimenol, triadimefon, peanut leaf spot to choose methyl thiophanate and so on. But it should also be noted that the same disease occurred in different crops, and sometimes can not use the same kind of medicine, such as Bordeaux liquid can prevent downy mildew, but easy to produce drug damage, it is not appropriate to prevent cabbage downy mildew. After the selection of the type of pharmaceuticals, but also according to crop types and growth period, the type of fungicide and dosage forms, environmental conditions, select the appropriate concentration.