Infection process
1. Penetration: The fungus penetrates the plant through wounds or natural openings, such as stomata.
2. Colonization: Once inside the plant, the fungus colonizes the intercellular spaces and vascular tissues.
3. Symptom development: The fungus produces toxins that cause the plant cells to collapse and die, resulting in the formation of red lesions.
4. Spore production: The fungus produces spores on the surface of the lesions, which are then dispersed by wind, rain, or insects.
Factors affecting infection
- Environmental conditions: Red rot is favored by warm, humid conditions.
- Plant age: Younger plants are more susceptible to infection than mature plants.
- Variety resistance: Some sugarcane varieties are more resistant to red rot than others.
Management
There are several management strategies for red rot, including:
- Planting resistant varieties: Planting sugarcane varieties resistant to red rot is the most effective management strategy.
- Crop rotation: Crop rotation with non-host crops can help to reduce the inoculum level in the soil.
- Sanitation: Removing infected plant material from the field can help to reduce the spread of the disease.
- Chemical control: Fungicides can be used to control red rot, but they are often not economically feasible.
- Biological control: Several biocontrol agents have been shown to be effective against red rot, but they are not yet widely used.
