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 [...]
The following points highlight the three main stages of host pathogen relationship. The stages are: 1. Pre-Penetration Stage 2. Penetration Stage 3. Post-Penetration Stage. 1. Pre-Penetration Stage: During pre-penetration stage the pathogen (inoculum) on arrival on the host surface interacts sharply with the surrounding environment and host itself. The environment which is an aggregate of all external conditions including temperature, [...]
In this article we will discuss about the study of plant diseases. One of the important aspects of study of plant diseases is how to either cure the disease or prevent its recurrence. Before any cure can be recommended, the cause or in other words, the causal agency of the disease should be known—whether parasitic or non-parasitic. Plant diseases can [...]