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Chilli Anthracnose

Chilli Anthracnose

Causal organism: Colletotrichum capsici
Family: Melaconiaceae
Order: Melanconiales
Class: Coelomycetes
Sub.Division: Deuteromycotina

Anthracnose is an economically important disease of chilli affecting both fruit and seed quality. The disease is more severe in all southern states.

Anthracnose
Anthracnose

Symptoms:

  1. Symptoms are seen on leaf, stem and fruit.
  2. Small, circular spots on the skin of the fruit and expanded in the direction of long axis of the fruit.
  3. The fruits with many spots drop off prematurely resulting in heavy loss of yield.
  4. Fungus may also attack the fruit stalk and spread along the stem causing dieback symptoms.

Irregular brown coloured spots

Irregular brown coloured spots on leaves

Water soaked lesion on fruit

Water soaked lesions on fruits

Initial symptoms of Anthracnose

Initial symptoms of anthracnose

Spores arranged in concentric rings

Spores arranged in concentric rings 

Symptoms extending along the axis of fruit

Symptom are extending in long axis

Die -back symptoms

Die- back sym

Disease cycle:

Primary source of inoculum: Infected seeds and diseased crop debris

Secondary source of inoculum: Conidia dispersed by rain splash and wind. It also infect Tomato, Potato, Brinjal, wild brinjal are the other hosts.

Epidemiology:

  • Ideal temperature is 28-32 ºC. The pathogen infects the host at a minimum temperature of 22-25º C.
  • Relative humidity: An RH of above 80 % is ideal. Heavy prolonged dew deposition is important for die-back development.

 


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