What is a fungicide? How many kinds are there?
What is a fungicide? How many kinds are there? Please describe the use of certain doses or concentrations of chemicals called fungicides that can kill or inhibit the growth of some bacteria or fungi that cause plant diseases. There are two main principles of fungicides to control diseases: chemical protection and chemotherapy. Chemical protection is to spray fungicides before the disease occurs, to prevent the invasion of germs or to kill the bacteria to invade, so that the crops are protected. For example, spraying Bordeaux liquid on apple trees to control ring spot and anthracnose. Chemotherapy is the application of fungicides after crop disease to kill invaded bacteria or change the pathogenic process of bacteria, so as to achieve the purpose of reducing or eliminating the disease. For example, chlorothalonil has a good therapeutic effect on cucumber downy mildew and other diseases. According to the principle of fungicides to control diseases, fungicides are usually divided into three categories: protective fungicides, therapeutic fungicides and internal absorption fungicides. Click to get more fungicide use technology click to get more pesticide use technology
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How to apply agricultural fungicides?
How to apply agricultural fungicides? Please introduce the method of agricultural fungicides are chemicals that can directly kill spores and mycelium of fungi or bacteria, or inhibit the growth and development of bacteria. The main results are as follows: 1 Agricultural fungicides must be used before or at the initial stage of crop diseases, which is different from killing insects and mites. Kill insects and mites.
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What are the functions of fungicides and what is their principle?
What are the functions of fungicides and how to use them? Please introduce that there are two ways of action of fungicides: one is protective fungicides, the other is internal fungicides. Protective fungicides come into direct contact with pathogens in vitro or on the body surface of plants, killing or inhibiting pathogens, making them unable to enter plants, thereby protecting plants.
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