Sugarcane Cytospora

The causative agent of this disease is the fungus Cytospora sacchari. It is a pathogenic organism known for causing necrotic lesions and systemic decline in tropical grasses. The fungus utilizes enzymes to break down plant cell walls, leading to significant structural damage within the vascular system of the host plant.

The primary host for this pathogen is sugarcane. The infection typically begins when fungal spores enter through wounds caused by insect feeding, harvest tools, or adverse weather conditions. The presence of the pathogen is closely linked to environments with high humidity and insufficient field sanitation, which facilitate spore dispersal.

Visible symptoms include the development of dark, sunken lesions on the sugarcane stalks. These lesions may become covered in small, pimple-like pycnidia. During periods of high moisture, these pycnidia exude spore masses that look like small threads or tendrils. As the infection progresses, the internal tissues turn discolored and may give off a sour or musty odor.

The economic impact of Cytospora sacchari is substantial, as it leads to reduced juice quality and lower sugar recovery. By disrupting the transport of nutrients and water, the fungus stunts stalk development and reduces the overall biomass per hectare. In severe outbreaks, the entire crop quality can be compromised, leading to significant financial losses for sugar producers.

• Use certified disease-free planting material.
• Implement strict sanitation practices during harvest.
• Minimize mechanical damage to the stalks.
• Control stalk-boring insects.
• Apply localized fungicide treatments where infection occurs.

Effective management requires a proactive approach centered on field hygiene. Because the pathogen relies on entry points to colonize the host, reducing stalk damage is crucial for prevention. Regular scouting allows agronomists to identify early signs of Cytospora sacchari and take immediate action, such as removing infected stalks to prevent wider contamination across the plantation.