Terminal stunt

Terminal stunt is a severe disease affecting cotton plants, typically transmitted by members of the Cicadellidae family, commonly known as leafhoppers. The disease disrupts normal plant growth, specifically targeting the apical meristem, which leads to stunted development and significant yield reduction in cotton-growing regions.

The causative agents of terminal stunt are usually phytoplasmas or viruses, which are introduced into the plant tissues by leafhoppers during their feeding process. Once the pathogen enters the vascular system, it spreads rapidly throughout the plant, interfering with nutrient translocation and hormonal regulation.

Characteristic symptoms include the shortening of internodes at the plant's terminal, resulting in a bushy or stunted appearance. The younger leaves become distorted, chlorotic, and curled, while the overall growth of the main stem is severely restricted, often preventing the formation of healthy cotton bolls.

The spread of the disease is highly dependent on the population density of the vector insects. Favorable environmental conditions that promote leafhopper migration and reproduction accelerate the dissemination of the pathogen across the field, making early detection critical for maintaining crop health.

The impact of terminal stunt on agricultural productivity is substantial, often rendering affected plants unproductive. Effective management strategies focus on both the vector and the host plant, including:

• Systemic insecticide applications to reduce vector pressure.
• Implementation of crop rotation and field sanitation.
• Removal and destruction of infected plants to limit spread.
• Use of resistant or tolerant cotton varieties where available.