It is a pesticide used to prevent and control plant diseases caused by various pathogenic microorganisms, generally referring to fungicides. However, it is usually regarded as the general name of drugs for preventing and treating various pathogenic microorganisms in the world. With the development of fungicides, they can be divided into three categories: fungicides, virus killers and algaecides.
According to the sterilization mechanism, it can be divided into two categories: oxidation bactericide and non-oxidation bactericide. Oxidative bactericide is usually a strong oxidant, which mainly oxidizes with metabolic enzymes in bacteria to achieve the purpose of sterilization.
Extended data:
Pesticide instructions have recommended concentration, but it is best to apply it according to the concentration proposed by the local plant protection technical department on the basis of efficacy test.
In dry or hot summer, the concentration should be reduced to avoid phytotoxicity. Secondly, when using fungicides, we should also pay attention to the duration and frequency of use. The key to master the application period is to master the occurrence and development law of diseases, make a good prediction of diseases, or prepare to spray fungicides according to the prediction of crop diseases by local plant protection departments.
Generally speaking, fungicides are sprayed at the early stage of diseases, such as rice blast. Especially in hot weather when rice blast develops rapidly, it should be sprayed immediately.
References:
Baidu encyclopedia-sterilization