In this article we will discuss about the defence mechanisms of host. Interaction between host and pathogen is a complicated process during which dis-balance host metabolic processes and formation of defence chemicals — phenolic substances take place. With the help of defence chemicals the host tries to repel the attack of the pathogen. These chemicals are not only active against [...]
In this article we will discuss about the classification of plant diseases. (i) Diseases classified in relation to their occurrence: Study of plant diseases in relation to their occurrence (interaction of populations of plants, pathogens and environment) is known as epidemiology. There may be infectious disease and contagious disease. A disease which spreads slowly and is incited by a transmissible [...]
The following points highlight the top sixteen mechanisms of dissemination of plant diseases. Some of the mechanisms are: 1. Dissemination by Seed 2. Dissemination by Propagating Stock 3. Dissemination with Plant Debris 4. Dissemination with Manure 5. Dissemination with Soil 6. Dissemination by Field Operations and Implements 7. Dissemination by Insects 8. Dissemination by Animals Other Than Insects and Others. [...]