Chilly Anthracnose

Causal Agent:
Colletotrichum capsici, C. gloeosporioides, C.
coccodes, C. acutatum.

Anthracnose affects
all above-ground parts of peppers
during any stage of growth. Seedling infection may be
confined to cotyledons and not spread. Necrotic gray
to brown spots may develop on leaves and stems. Fruit
lesions are the most economically important aspect
of this disease. Fruit symptoms begin as water-soaked
areas that turn tan or brown. Lesions may be small
and circular, or coalesce to cover large areas of the
fruit. Under moist conditions, pink, salmon or orange
masses of spores are formed, usually in concentric rings.
Depending on the Colletotrichum species present, black
or brown filamentous structures may be visible in the
lesion. Anthracnose can affect both green and ripe fruit,
but symptoms are usually not visible until fruit ripen and
turn red.

Conditions for Disease Development:
Warm, wet weather generally favors infection and
development of symptoms. Depending on the species
of Colletotrichum present, optimal temperatures for
infection range from 20° to 27° C (68° to 81° F). Free
moisture is necessary for infection. Fog and dew are
conducive to disease development. Rain disseminates
the pathogen’s spores and often leads to severe losses,
especially if fruit are wounded. These fungi can survive in
infected seed and persist in leaf or stem lesions in plant
debris for long periods of time.

This disease can be managed by sowing good quality
seed, rotating out of solanaceous crops for two to three
years, removing weeds and infected debris, and choosing
fields that drain well. Minimize fruit wounds by controlling
insects. Copper fungicides are available, but have limited
economical value for controlling this disease.

Seed treatment with Thiram 2kg/ha or Zineb 2.5 kg/ha

Use ziram or Acrisio to control this disease.

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