Plant diseases are divided into two major categories: infestation and non-infection. Classification methods for pathogenic diseases caused by pathogens include:
1, according to the pathogens are divided into fungal, bacterial, viral and nematode diseases.
2. According to the host plant, it can be divided into crops, vegetables, diseases of fruit trees and forest diseases, etc. It can also be divided into different crop diseases such as wheat, rice, cotton, etc. according to the variety of stomata.
3, according to the symptoms can be divided into leaf spot disease, rot disease, wilt disease and so on.
4, according to the site of disease can be divided into root disease, stem disease, leaf disease, fruit disease and so on.
5, according to the mode of transmission can be divided into air, water, soil, seed propagation, insect mediator transmission.
Pathogens from the infection to the host plant disease process, referred to as the course of disease. Infestation procedures are generally divided into 3 periods:
1, the invasion period. From the pathogen invades to establish a nutritional or parasitic relationship with the host plant for a period of time.
2, the incubation period. From the time when the pathogen initially establishes a parasitic relationship with the host plant to the appearance of obvious symptoms. The length of the incubation period varies depending on the biological characteristics of the pathogen; the type, growth status, and timing of the host plant; and the effects of environmental conditions.
3, the onset period. The infested host plants have obvious symptoms on the external morphology, including the pathological changes reflected in the external morphology of infected plants and the stages in which the pathogens produce propagules.
The plant disease rapid diagnosis instrument is a professional instrument for detecting plant viruses. It can quickly diagnose a variety of viruses and bacteria in crops, thus providing a scientific basis for plant diseases.
1, according to the pathogens are divided into fungal, bacterial, viral and nematode diseases.
2. According to the host plant, it can be divided into crops, vegetables, diseases of fruit trees and forest diseases, etc. It can also be divided into different crop diseases such as wheat, rice, cotton, etc. according to the variety of stomata.
3, according to the symptoms can be divided into leaf spot disease, rot disease, wilt disease and so on.
4, according to the site of disease can be divided into root disease, stem disease, leaf disease, fruit disease and so on.
5, according to the mode of transmission can be divided into air, water, soil, seed propagation, insect mediator transmission.
Pathogens from the infection to the host plant disease process, referred to as the course of disease. Infestation procedures are generally divided into 3 periods:
1, the invasion period. From the pathogen invades to establish a nutritional or parasitic relationship with the host plant for a period of time.
2, the incubation period. From the time when the pathogen initially establishes a parasitic relationship with the host plant to the appearance of obvious symptoms. The length of the incubation period varies depending on the biological characteristics of the pathogen; the type, growth status, and timing of the host plant; and the effects of environmental conditions.
3, the onset period. The infested host plants have obvious symptoms on the external morphology, including the pathological changes reflected in the external morphology of infected plants and the stages in which the pathogens produce propagules.
The plant disease rapid diagnosis instrument is a professional instrument for detecting plant viruses. It can quickly diagnose a variety of viruses and bacteria in crops, thus providing a scientific basis for plant diseases.
Information of company and product
1)Wire diameter(thickness): 0.15mm to 50mm
2)Material: Carbon steel(SWC), cold roller steel, stainless steel(SUS),
beryllium copper, phosphor copper, brass, music wire or piano wire
(SWP), 60Si2Mn, 55CrSi etc
3)Finish: blacking, zinc/nickel/chrome/silver/gold plating, powder
coated etc
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Baby carriage, Bicycle, Kitchen appliances, Cameras, Printers, Office
equipment, Precision equipment and various kinds of vehicles
Professional Customize Metal Stamping,Custom Stainless Steel,Brass Stamping Parts,Metal Stamping Press
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