Colletotrichum doitungense

Colletotrichum doitungense is a fungal pathogen belonging to the genus Colletotrichum, widely recognized as a causative agent of anthracnose. It is an ascomycete fungus that causes significant damage to plant tissues, manifesting primarily as necrotic lesions on foliage, stems, and ripening fruits.

This pathogen has a relatively broad host range, impacting various economically important crops. It is frequently observed affecting coffee berries, chili peppers, strawberries, and other fruit-bearing species. The ability of the fungus to survive on debris makes it a persistent threat in agricultural environments with high plant density.

The characteristic symptoms include the appearance of circular, sunken lesions on the surface of the affected plant parts. These spots eventually turn dark brown or black and produce masses of conidia, which appear as orange or pinkish gelatinous spore masses. This deterioration severely impacts the market value and shelf life of the produce.

The development and spread of Colletotrichum doitungense are heavily influenced by environmental factors, particularly humidity and temperature. The fungus thrives in warm, humid climates where water splash from rain or irrigation facilitates the dispersal of spores from infected tissues to healthy host plants nearby.

Effective management requires an integrated pest management (IPM) strategy. This includes improving drainage, maintaining canopy sanitation to reduce humidity, and the timely application of protectant and systemic fungicides. Crop rotation and the selection of resistant cultivars are essential components for long-term control of this pathogen.