- Initially yellowing of leaves and stunted growth of the plant is observed, which later on dry from tip to downwards.
- In the early stage of infection, the roots of the plants become pink in colour and rotting take place later. In the advanced stage, the bulb starts decaying from lower ends and ultimately the whole plant dies.
- Survival and spread:- Pathogen survives in soil and garlic bulb as a primary source of inoculum in the form of Chlamydospore, resting spore) for many years.
- Favourable conditions:- Moist soil and 27 °C temperature favours the development of disease.