About Lesson
Etiology:
Favorable condition
- The optimum temperature for the disease to occur is 28-30°C
- relative humidity of 90-100%, below 70 percent is not favourable for disease to occur or is negligible
- Disease spreading is highly influenced by high relative humidity and rainfall.
- Rainfall over 100 mm in the first two weeks of infection favours early infection and disease development in plant.
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