Ipomoea korea begomovirus

Begomovirus ipomoeakoreaense is a viral plant pathogen belonging to the Geminiviridae family. This virus contains a circular, single-stranded DNA genome. It is classified as a persistent, circulative, and non-propagative virus that primarily impacts crops within the Convolvulaceae family, specifically affecting sweet potato production.

The virus acts as a systemic pathogen, moving through the plant's vascular system to disrupt essential metabolic functions. By interfering with the phloem, it prevents the proper transport of nutrients from the leaves to the roots, which is the primary cause of yield loss and reduced root quality in infected plants.

Symptoms of infection include significant mosaic patterns on leaves, interveinal chlorosis, leaf curling, and severe stunting. In advanced stages of the disease, plants exhibit shortened internodes and a decrease in tuber size, which drastically limits the marketability of the harvest.

Transmission occurs exclusively through the feeding activity of whitefly species, particularly Bemisia tabaci. These insects acquire the virus while feeding on infected sap and transmit it to healthy plants during subsequent feeding sessions. Warm climates and poor weed management in fields act as catalysts for the rapid spread of the virus.

Management strategies focus on vector control and host sanitation. Growers are advised to use virus-free vegetative propagules, maintain strict weed control to eliminate alternative hosts, and apply systematic insecticides to minimize whitefly populations. Implementing physical barriers and utilizing resistant cultivars remains the most sustainable approach to long-term disease management.