In this article we will discuss about the wilt of arhar caused by deuteromycetes. Host: Cajanus Cajan Pathogen: Fusarium oxysporum f.udum Introduction to the Wilt of Arhar: The wilt disease of arhar is a most severe threat to the arhar producing states in the country such as U.P., M.P., Bihar and in parts of Bombay. Symptoms of Wilt Disease: The [...]
In this article we will discuss about the little leaf of brinjal caused by mycoplasma. Symptoms of Little Leaf Disease: The main symptom of the disease is the production of very short leaves by affected plant. The petioles are so much reduced in size that leaves appear sticking to the stem. Such leaves are narrow, soft, smooth and yellowish in [...]
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 enÂvironment which is an aggregate of all external conditions including temperature, [...]