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Horticultural crops :: Flowers :: Gerbera

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.

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