Colletotrichum gloeosporioides, C. capsici, C. acutatum,
and C. coccodes
All growth stages may be affected, including post-
harvest stages. Symptoms occur primarily on ripening
fruit often where fruit is touching the soil or plant debris.
On ripe fruit there are small, sunken circular depressions
up to 30 mm in diameter. The center of the lesions
becomes tan in color while the tissue beneath the lesion
is lighter-colored and dotted with many dark-colored
fruiting bodies of the fungus that form concentric rings
in the lesion. The salmon-colored areas on the surface
in the central portions of the lesions consist of large
masses of fungus spores.
Green fruit may also be infected but symptoms will
not appear until the fruit ripens at harvest time. Such
an infection is called latent. Young fruit infected by C.
acutatum can have visible symptom development.
Foliage and stem symptoms appear as small,
irregularly shaped gray-brown spots with dark brown
Among the Colletotrichum spp. that affect pepper,
C. gloeosporioides has the widest host range among
solanaceous crops and various biotypes have been
reported on hosts. C. acutatum has caused severe fruit
and foliar damage to pepper in several tropical and
How to Identify Anthracnose
Water-soaked and sunken lesions, sometimes reaching 4 cm in diameter, develop on mature fruits.
Note the dark concentric rings of fungal tissue.
Written by Ray Cerkauskas, Visiting Scientist from Agriculture and Agri-Food Canada. Edited by Tom Kalb. Photos by Lowell L. Black
and Glen L. Hartman. 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; www: www.avrdc.org
regions. C. coccodes is the least aggressive species
and is more commonly found in temperate regions. In
general, disease symptoms caused by the various
species of Colletotrichum are similar and microscopic
analysis is necessary to identify species.
Conditions for Di