Andean potato latent virus

The Andean potato latent virus (APLV) is a plant pathogenic virus belonging to the Tymovirus genus. It poses a significant challenge to the potato industry, primarily because the infection often manifests as latent, meaning plants may remain asymptomatic while acting as reservoirs for the virus.

Potatoes are the primary host for this virus, but it can also infect various species within the Solanaceae family. The transmission of the virus occurs via infected tubers used for propagation, as well as through mechanical contact between plants or via contaminated agricultural tools and equipment.

Symptoms of APLV infection can include mild mosaic patterns, leaf mottling, and in some cases, leaf distortion or stunted growth. Because the symptoms are frequently subtle or non-existent in certain cultivars, the virus can spread undetected throughout seed lots, leading to significant yield losses over successive planting generations.

The development and spread of the virus are influenced by the presence of insect vectors and the availability of alternative weed hosts that harbor the pathogen in the field environment. Environmental conditions that favor the proliferation of these vectors exacerbate the risk of secondary infections within a crop.

Effective management requires strict adherence to phytosanitary regulations, including the use of virus-indexed seed potatoes and tissue culture-derived stock. Prevention strategies focus on eliminating potential weed reservoirs, practicing rigorous sanitation of tools, and implementing systematic diagnostic testing to ensure the integrity of the seed supply chain.

• Deployment of certified virus-free seed stocks.
• Application of meristem culture for disease elimination.
• Stringent quarantine controls on imported tubers.
• Management of weed hosts within and surrounding potato fields.