Squash tiger virus

The causative agent of this disease is Potyvirus pepotigris, a member of the genus Potyvirus. This plant pathogen causes a systemic viral infection, leading to stunted growth and significant physiological distress in susceptible horticultural host plants.

The virus primarily affects crops within the Cucurbitaceae family. Economic losses are most frequently observed in pumpkins, squash, gourds, and cucumbers. The infection remains a persistent challenge in both open-field agricultural production and greenhouse environments across various geographical regions.

Symptomatology involves severe mosaic patterns on leaves, leaf distortion, and distinctive tiger-like spotting on the surface of the fruits. These symptoms disrupt the plant's ability to produce healthy harvests, as the systemic nature of the virus leads to poor vegetative development and lower fruit quality.

Transmission occurs primarily through aphid vectors, which acquire the virus from infected plants and transmit it to healthy ones during feeding. Environmental spread is also facilitated by the presence of reservoir hosts, such as perennial weeds and nearby wild cucurbits that harbor the virus throughout the growing season.

The economic impact of Potyvirus pepotigris is severe, often resulting in market-rejectable produce and substantial yield decline. Management strategies must prioritize integrated pest management (IPM), specifically focusing on controlling aphid populations, utilizing resistant cultivars, and implementing strict sanitation practices to remove viral inoculum sources.

• Implementing consistent aphid control programs.
• Maintaining field hygiene by removing symptomatic plants.
• Controlling alternative weed hosts around the fields.
• Using certified, virus-free seeds and transplants.