In this article we will discuss about the structural and biochemical defense mechanisms in plants I. Structural Defense: In plants some structures are already present to defend the attack while in others, the structures to defend the host develops after the infection. In this way, structural defense can be characterised as (A) Preexisting defense structures and (B) Defense structures developed [...]
The following points highlight the two main principles for controlling plant diseases. The principles are: 1. Prevention or Prophylaxis 2. Cure. Principle # 1. Prevention or Prophylaxis: It is the protection of the host from infection and exposure to pathogen. Prevention includes a wide variety of control measures. These are: 1. Immunity: It means the resistance of the host to [...]
In this article we will discuss about the general symptoms of plant diseases. The changes in the host plant which serve to recognise the disease are called the signs and symptoms of the disease. The sign of a disease is the external appearance of some portion of the pathogen of the host. It may be some portion of the [...]