Pepper yellowing virus

The causative agent of the disease is Potyvirus capsiflavi, a member of the potyvirus group. It is a systemic viral pathogen that infects plant cells, significantly disrupting physiological functions and impairing the overall growth and productivity of the host crop.

The virus primarily affects solanaceous crops, with bell and chili peppers being the most susceptible. Other wild species within the Solanaceae family can act as alternate hosts, sustaining the virus in the environment between crop growing seasons and serving as primary infection reservoirs.

Typical symptoms include distinct chlorotic yellowing of the leaf blades, often accompanied by leaf curling, distortion, and stunted plant growth. In many cases, the fruit displays irregular yellow or green mottling, which severely degrades its market value and overall quality for consumers.

The spread of the virus is largely facilitated by insect vectors, most notably aphids. These insects acquire the virus while feeding on infected plants and subsequently transmit it to healthy crops during their probing and feeding activities. High-density planting and warm temperatures that favor aphid reproduction promote rapid disease progression.

The impact of this virus is primarily economic, as it leads to substantial yield losses and poor fruit quality. Since there are no curative chemical treatments for viral infections in plants, the control strategy must rely heavily on integrated pest management and rigorous hygiene practices to minimize the impact.

• Utilize high-quality, virus-free certified seeds and transplants.
• Implement rigorous aphid population management through regular monitoring.
• Promptly rogue and destroy any symptomatic plants to stop the spread.
• Maintain clean field borders by removing potential weed hosts.
• Ensure strict sanitization protocols for tools and equipment used in the field.