Fusarium wilt caused by Fusarium acutisporum

The causal agent of this plant disease is the soil-borne fungus Fusarium acutisporum, belonging to the Fusarium genus. This pathogen invades the vascular tissues of the host, disrupting the movement of water and nutrients throughout the plant. It is categorized as a vascular wilt and root rot disease.

The fungus affects a wide range of host plants, most notably cereal crops, legumes, and several vegetable varieties. It is capable of attacking plants at various growth stages, although the most severe symptoms usually appear during active vegetative growth or the grain-filling period. The pathogen is highly adapted to persistence in diverse environmental conditions.

Typical symptoms include yellowing and curling of the lower leaves, followed by progressive wilting that affects the entire plant. A diagnostic sign is the internal browning or discoloration of the stem and root vascular bundles. Under high humidity conditions, a white or pinkish fungal mycelium may develop on the surface of affected plant tissues.

The development of the disease is favored by warm, humid soil conditions, typically ranging from 20°C to 25°C. The fungus survives in the soil and on crop debris, often serving as a primary inoculum source for subsequent seasons. Dissemination occurs primarily through contaminated soil, infected seed lots, and movement of machinery across fields.

The impact of this disease is significant, resulting in substantial yield losses and degradation of crop quality. The presence of the pathogen often leads to the accumulation of mycotoxins in the grains, which pose severe risks to livestock and human health. Therefore, managing the disease is crucial for ensuring food safety and economic profitability.

• Implementing diverse and effective crop rotation programs.
• Using certified, fungicide-treated seeds.
• Improving soil drainage to prevent excessive moisture.
• Applying balanced fertilization with high potassium levels.
• Removing and destroying infected crop residues from the field.