Potato Andean mottle virus

Potato Andean mottle virus (APMoV) is a destructive plant virus belonging to the genus Comovirus, family Secoviridae. It primarily affects potato crops and is widely recognized as a significant constraint for potato production, particularly in its regions of origin in the Andean highlands of South America.

The virus has a specific host range, mainly centered on species within the Solanaceae family. Potato is the primary economic host, although various wild solanaceous species can serve as natural reservoirs for the virus. The impact of the virus is characterized by systemic infection, which depletes the plant's resources and drastically reduces tuber yield.

Symptoms of APMoV infection typically manifest as distinct mottle patterns, chlorosis, and crinkling of the foliage. Infected plants often exhibit stunted growth and loss of vigor. In severe cases, the characteristic mosaic patterns can lead to necrosis, significantly reducing the photosynthetic capacity of the leaves and negatively impacting overall plant development.

Transmission occurs through mechanical contact, such as farm machinery or human activity in the field, and is effectively facilitated by insect vectors, specifically chrysomelid beetles. Furthermore, the virus can be transmitted through infected tubers, which represents a major risk for the global spread of the disease if infected planting material is moved between regions.

Management of the Potato Andean mottle virus requires a multifaceted approach focused on preventing the introduction and spread of the pathogen. Since there are no curative treatments for viral diseases, the following strategies are essential:

• Implementation of a certified clean seed potato certification program.
• Rigorous insect vector control using appropriate insecticide regimes.
• Early detection and roguing of infected plants to limit the spread of inoculum.
• Sanitation practices for field tools and machinery to prevent mechanical transmission.
• Utilization of resistant or tolerant potato varieties where available.