Colletotrichum coccodes and other Colletotrichum species
World Vegetable Center
Symptoms appear on ripe fruit, often where the fruit is
touching crop debris or soil. Small circular depressions
appear and enlarge up to 12 mm in diameter. The center
of the lesion usually becomes tan in color and is dotted
with many dark-colored fruiting bodies of the fungus
that form concentric rings in the lesion. Salmon-colored
spores may appear on the surface of the lesion. At
later stages, lesions may merge to affect large portions
of the fruit or they may crack to allow secondary
organisms to invade the fruit and cause soft rot. Green
fruit may also be infected but symptoms will not appear
until the fruit ripens. Such an infection is called latent.
Foliage symptoms are rare and characterized as
small, circular brown lesions surrounded by yellow
Infection of roots is characterized by brown and
decayed internal tissue with many small black dots
(fungal fruiting structures) below the surface of the roots.
Root growth slow down, leading to yellowing and
stunting of the entire plant.
Conditions for Disease Development
The pathogens persist on alternate hosts, crop debris,
and some weeds. Alternate hosts include other
Written by Ray Cerkauskas, Visiting Scientist from Agriculture and Agri-Food Canada. Edited by Tom Kalb.
Published by AVRDC – The World Vegetable Center; P.O. Box 42, Shanhua; Taiwan 741; ROC.
tel: (886-6) 583-7801; fax: (886-6) 583-0009; email: email@example.com; web: www.avrdc.org
Symptoms appear on ripe fruit. Look for small circular depressions (top photo). Salmon-colored lesions may
appear on the surface of the lesion (left photo). Lesions may crack, allowing secondary diseases to invade
the fruit (right photo).
How to Identify Anthracnose
solanaceous crops (potato, pepper and eggplant),
cucurbits, and soybean. The fungus is also seed-borne.
The fungus spores are usually dispersed by
splashing rain. Wetness is required for infection. The
longer the peri