Glume blight

Glume blight is a fungal disease affecting various cereal crops, primarily caused by the pathogen Epicoccum sorghinum. This disease is known to significantly impact the grain filling stage, leading to qualitative and quantitative losses in agricultural production.

The primary crop affected by this pathogen is rice. Under favorable environmental conditions, the fungus can cause severe damage to the panicles, preventing proper grain formation and reducing the overall quality of the harvested produce.

The symptoms of glume blight are characterized by the appearance of dark brown or black lesions on the glumes and floral parts of the panicle. In severe cases, the entire grain surface becomes discolored, and a grayish mycelial growth may appear on the spikelets during moist weather.

Development of the disease is highly dependent on humidity and temperature. Warm temperatures (20–28 °C) coupled with high relative humidity and frequent rainfall create ideal conditions for spore germination and colonization of host tissues during the flowering and grain-filling stages.

The damage caused by Epicoccum sorghinum involves the reduction of seed viability and overall yield loss. Infested grains often become shriveled and lightweight, which complicates processing and negatively impacts the market value and nutritional quality of the crop.

Effective management and protection strategies include:

• Using certified, pathogen-free seeds treated with systemic fungicides.
• Selecting resistant rice varieties suitable for local climatic conditions.
• Implementing proper crop rotation and sanitation to remove plant debris.
• Managing irrigation levels to reduce humidity within the canopy.