Colletotrichum plurivorum

The fungus Colletotrichum plurivorum is a prominent phytopathogen responsible for causing anthracnose across various economically important crops. This fungus belongs to the Colletotrichum genus, which is characterized by its high virulence and ability to colonize host tissues by producing specialized infection structures, leading to significant yield reduction.

The primary hosts for this pathogen include various legumes, with soybean being the most significant crop affected. The economic importance of this disease is linked to its potential to cause early maturation, lodging, and poor grain quality. Because the pathogen possesses a broad host range, it effectively persists within agricultural landscapes by utilizing alternative wild hosts and debris.

Clinical signs of infection typically include necrotic lesions on stems, leaf petioles, and pods. In severe cases, the affected areas become covered with dark, sunken acervuli, which are the fruiting bodies of the fungus. Under high humidity, these structures exude masses of conidia, often appearing as slimy, orange, or salmon-colored pustules, which facilitate the rapid spread of the pathogen throughout the field.

The development of Colletotrichum plurivorum is heavily influenced by meteorological conditions. Warm temperatures and high rainfall are critical for spore germination and infection processes. The fungus can survive in the soil for several seasons and is also efficiently transmitted via seed, making seed health management an essential component of disease control strategy.

Effective prevention and control require a multi-faceted approach. Implementing long crop rotations and ensuring the use of certified pathogen-free seeds are fundamental steps. Furthermore, post-harvest tillage practices help bury infested crop debris, significantly reducing the primary inoculum source for the following season. Regular field monitoring followed by timely fungicide applications can mitigate the impact of the disease during periods of high infection risk.