What is a protective biocide? What is the difference between protective fungicide and systemic fungi

Protective fungicides are in direct contact with pathogenic bacteria outside the plant or on the body surface, killing or inhibiting the pathogenic bacteria so that they cannot enter the plant, thereby protecting the plant from the harm of pathogenic bacteria. This kind of fungicide is called a protective fungicide, and its effect has two aspects: one is that the agent directly kills the pathogenic bacteria in contact with the pathogenic bacteria after spraying, that is, "contact bactericidal effect"; The second is to spray the agent on the surface of the plant body, and when the pathogenic bacteria fall on the plant body and come into contact with the agent, it is called "residual bactericidal effect".

Protective fungicides mainly include the following categories: sulfur and inorganic sulfur compounds, such as sulfur suspension, solid stone sulfur mixture, etc.; copper preparations, mainly Bordeaux liquid, cupro-ammonia mixture, etc.; organosulfur compounds, such as formamib, zepzeb, ammonium dicen, mancozeb, etc.; phthalammonium phosphates, such as clodidan, dimethane and sterilizer, etc.; antibiotics, such as jinggangmycin, blasticidin, polyoxymycin, etc.; Other categories, such as leaf withering, leaf withering, chlorothalonil, Hesuining, etc. Systemic fungicides can be absorbed by crops after being applied to a certain part of the cropping object, and transported to other parts of the cropping object in the body to take effect, and fungicides with this property are called "systemic fungicides".

There are two conduction modes of systemic insecticides: one is to apical conduction, that is, after the agent is absorbed into the plant, it is transmitted to the top of the plant with transpiration to the top of the plant, to the parietal leaves, apical buds, leaves, and leaf margins. Most of the current systemic fungicides belong to this category.

The other is basal conduction, that is, after the agent is absorbed by the plant body, it conducts downward along the transport of photosynthesis products in the phloem.

The principle of fungicide to control plant diseases: simply put, fungicides are compounds that have a toxic effect on pathogenic microorganisms. However, the meaning of the word "sterilization" is not limited to "killing" the growth of pathogenic microorganisms or the germination of spores.

Fungicides that can kill pathogenic microorganisms play a bactericidal role, and fungicides that can inhibit the germination or growth of pathogenic spores play a bacteriostatic effect, both of which can achieve the purpose of disease prevention and treatment in agricultural production. Fungicides have different modes of action and different methods of use, but fundamentally speaking, the principles of fungicides to prevent and control diseases are nothing more than three principles, namely chemical protection, chemical ** and chemical immunity.

Fungicides are generally divided into protective fungicides and first-class fungicides, and it is necessary to pay attention to the difference between the two.

Protective fungicides are good for prevention and poor for prevention. Such as streptomycin, mancozeb, Dasheng, Amicida, Daknin, etc., after spraying, a protective film is formed on the surface of the crop, which hinders the pathogenic spores from entering the plant body, and can inhibit the sporangia germination spores in the plant body. It also has a killing effect on newly germinated spores.

Because of these properties, the correct application method of the protective agent should be to apply it before the onset of crops, and its protective effect is significant. At this time, if the first agent is used directly, not only the prevention and control effect is poor, but also easy to cause drug damage.

**Sexual fungicides are poor in prevention and good in **. Such as Jinlei, Pulik, ethylphosphine aluminum-manganese-zinc, Shigao, Yinfari, etc., in the susceptible spores have invaded the crop body, the crop has obvious symptoms, some leaves, stems or fruits have appeared disease spots and other symptoms, the need to choose the best fungicide, can kill the spores and sporangia that have germinated, to achieve the ideal effect. If it is too late to use protective agents at this time, manpower and material resources are often wasted.

In production, many vegetable farmers mix protective and first-class fungicides, resulting in poor drug efficacy. If the drug is used in the future, the vegetable farmer can distinguish the dosage form and apply it correctly.

The difference between the two is:

Protective fungicides are used to treat plants or the surrounding environment with pesticides before pathogenic microorganisms come into contact with plants or are not immersed in plants, so as to inhibit the germination of pathogenic spores or kill germinating pathogenic spores.

Systemic fungicides are fungicides that are absorbed into the plant body by the leaves, stems and roots of the plant, and are transported to the site of action in the plant.

There are many advantages of pesticide protective fungicides, the first point is that it can be effectively prepared before the occurrence of diseases. To give a simple example, spring is the season when insect pests are prone to high incidence, for example, it is particularly easy to breed some red spiders, if we do not flood before the red spiders, before this disease occurs, we effectively spray the protective agent to prevent insects, even if this insect has appeared, and even to run to our crops, because the protective agent has been sprayed, as long as it is touched, it is easy to die, and the sprayed protective agent will also have a smell, these insects will not approach, and the occurrence of diseases can be avoided naturally. <>

In fact, the protective agent can also effectively kill some insects. Generally speaking, the insect has not occurred on a large scale, and the insect has been killed when it is not strong, which can also play a role in effectively protecting the growth of crops, which is a very effective way to prevent crop damage and effectively protect the growth of crops. <>

With the protective agent, natural insects will not lay eggs on our crops, and naturally there will be no problem of flooding later. Some insects are generally overflowing to the point that they will lay eggs in, of course, we spray pesticide protectors, and these insects will naturally not lay eggs on our crops. In this way, when we do insect protection in the later stage, we can naturally save a lot of worry, and it will not bring damage and impact to our crops.

Early spraying of this pesticide-protective fungicide can avoid the occurrence of resistance and the emergence of stubborn insect infestations. The same number of times of use is easy to produce resistance, but we spray in advance generally will not produce resistance, after all, it is used in advance, insects have not been exposed to this agent, contact is easy to react and die, naturally you can protect and combat the invasion of insects in many ways.

The advantage is that you can prepare in advance, and you can also kill all some insect pests, which can make the speed of plant growth become particularly fast, and there will be no recurrence, and there is no bitter taste when you eat it again.

Avoid the damage of the plant to insects, let the yield of the plant be higher, can not harm the plant, can make the plant fuller, so that the fruit of the plant tastes better.

In this way, the effect of sterilization can be achieved, the fertility of the soil can be guaranteed, and the generation of pests and diseases can also be prevented, and the yield of crops can also be improved, and the quality of crops can also be guaranteed.

It can kill insects, make plants grow better, make plants healthier, produce more, and taste better.

1. Antibacterial agents are substances that can inhibit the growth of bacteria. Bacteriostatic agents may not kill bacteria, but they can inhibit the growth of bacteria and prevent them from growing too much and harming your health. All essential oils, to a greater or lesser extent, have the ability to inhibit the growth of bacteria.

Some essential oils only inhibit the growth of certain special germs, while some essential oils inhibit many types of germs. At the same time, a very small amount of essential oils can produce a good antibacterial effect, such as cloves, lavender, rosemary, sage and thyme and other essential oils, and the antibacterial effect is very good.

2. Fungicides, also known as biocides, bactericidal algaecides, microbicides, etc., usually refer to chemical agents that can effectively control or kill microorganisms in the water system - bacteria, fungi and algae. Internationally, it is usually used as a general term for the prevention and treatment of various pathogenic microorganisms. Fungicides, also known as biocides, bactericides and algaecides, microbicides, etc., usually refer to chemical agents that can effectively control or kill microorganisms - bacteria, fungi and algae in the water system.

It is mainly divided into two types: agricultural fungicides and industrial fungicides.

Before the fungus infects the crop, the pesticide is applied on the surface of the crop to prevent the invasion of the fungus and play a protective role, this kind of fungicide is called a protective fungicide. Disease prevention characteristics: After the use of fungicides, a dense protective film with air permeability, water permeability and light transmission can be formed on the surface of crops, which can inhibit the germination and invasion of pathogen spores to achieve the effect of sterilization and disease prevention.

Wide bactericidal spectrum and strong concomitant treatment; It is not easy for bacteria to develop resistance. Reference.

Fungicide is a general term for pesticides for the prevention and control of plant diseases, mainly refers to a class of substances that are toxic to plant pathogenic bacteria (fungi, bacteria, viruses), and have the ability to kill these pathogenic bacteria or inhibit their growth and development at a certain dose or concentration, as well as substances that have no direct virulence to pathogenic microorganisms but can improve plant disease resistance, thereby reducing or inhibiting the occurrence of diseases.

Protective fungicide refers to the uniform distribution of the liquid medicine on the surface of the plant and the formation of a film to prevent the invasion of pathogens, and is used before the onset of the disease. Systemic fungicides are applied in the early stage or during the onset of the disease. In planting, the two are often used interchangeably.

Fungicide is a general term for pesticides for the prevention and control of plant diseases, mainly refers to a class of substances that are toxic to plant pathogenic bacteria (fungi, bacteria, viruses), and have the ability to kill these pathogenic bacteria or inhibit their growth and development at a certain dose or concentration, as well as substances that have no direct virulence to pathogenic microorganisms but can improve plant disease resistance, thereby reducing or inhibiting the occurrence of diseases.

Bacteriostatic agents are used to prevent the growth of existing bacteria. Such as: macrolides, lincoamides, amide alcohols.

Fungicides are used to kill the original bacteria. Such as: dysenammonium, sodium dirust, fumei zinc.

Bacteriostasis inhibits the growth and reproduction of microorganisms, inhibits the activity of microorganisms in the system to be treated, and reduces their reproductive ability or stagnates reproduction.

Microbiocide refers to the process of killing microorganisms in the system to be treated.

Chemoprotection refers to the use of drugs to kill or prevent the invasion of the diseased stool fungus before the pathogenic bacteria invade the host plant, so that the plant can be protected from damage. There are two ways for fungicides to achieve chemical protection. According to the inoculum to slow down the nomadic source application.

Inoculum** includes pathogen overwintering sites, intermediate hosts, infected soils, infected seeds, propagation material, and field disease centers. Apply pesticides on the surface of plants that may be infested or on the surface of agricultural products that are disturbed. It is the most effective way of chemical protection against most airborne leaf diseases.

The application of pesticides makes a uniform film form on the surface of the plant, and the spores of the fungus cannot germinate and invade. In addition, spraying or dipping agricultural products with fungicides to prevent the occurrence of diseases during the storage and transportation of fruits and vegetables is also a kind of chemical protection.