Blossom blight : Phytophythora palmivoras
Symptoms
- The disease appears as light brown, irregular, water soaked spots on flower stalks and petals.
- The spots increase rapidly and coalesce with one another and form distinct depressed lesions.
- Under humid conditions the infections become severe involving the entire flower head and resulting in blossom blight and stalk rot.
- The disease is favoured by drizzling rains and cool moist weather. The fungus is soil-borne and the infection starts from the base touching the soil.
Management
- Use of disease free soil for cultivation reduces the disease incidence.
- Affected flowers should be collected and destroyed.
- Excessive watering should be avoided.