Alstroemeria yellow spot virus

The causative agent of the disease is the Orthotospovirus alstroemeriflavi virus, belonging to the genus Orthotospovirus within the Tospoviridae family. This is a severe viral infection that primarily affects ornamental bulbous and rhizomatous crops, disrupting essential physiological processes in plant cells and causing significant tissue deformations.

The primary host for this virus is the Alstroemeria (Alstroemeria) plant. Scientific studies indicate that the pathogen may occasionally affect other ornamental varieties, impairing their aesthetic value and reproductive capacity, which presents a significant risk to commercial floriculture operations.

Characteristic symptoms include the development of chlorotic spots, yellow streaks, and concentric rings on the foliage. In advanced stages, plants exhibit leaf curling, stunted growth, flower stalk distortion, and a major decline in bloom quality, rendering the final product unsuitable for market distribution.

The virus is primarily transmitted by insect vectors, specifically various species of thrips (Thripidae), which acquire the virus while feeding on infected plant tissues. Additionally, the pathogen can be spread mechanically during standard horticultural practices, such as harvesting flowers, dividing rhizomes, or transplanting without proper disinfection of tools.

Effective management strategies rely on strict quarantine measures and proactive prevention. These include:

• Utilizing only certified virus-free propagation material.
• Implementing regular monitoring and aggressive control of thrips populations using insecticides.
• Promptly rogueing and destroying symptomatic plants along with the surrounding root ball.
• Systematically disinfecting all gardening tools with alcohol or sodium hypochlorite solutions.