Ipomoea golden mosaic virus

Ipomoea golden mosaic virus, scientifically identified as Begomovirus ipomoeasouthcarolinaense, is a viral pathogen belonging to the Geminiviridae family. It primarily impacts members of the Convolvulaceae family, such as sweet potatoes and various ornamental morning glory species, causing significant physiological distress.

The virus is an obligate parasite that requires specific vectors for transmission. In nature, it is primarily vectored by the whitefly Bemisia tabaci. When the insect feeds on the phloem of an infected plant, it acquires the virus and subsequently inoculates healthy plants during further feeding sessions, leading to the rapid spread of the disease.

Symptoms of the infection are typically characterized by golden or bright yellow patches on the leaves, creating a classic mosaic pattern. Affected plants exhibit stunted growth, reduced leaf size, and overall chlorosis. In economic terms, the virus significantly limits the yield potential by inhibiting the development of storage roots and reducing the overall vigor of the plant.

Environmental conditions play a critical role in the dissemination of this begomovirus. Warm, humid climates encourage the proliferation of whitefly populations, which are the main engines of viral spread. Moreover, the presence of perennial weed reservoirs ensures the survival of the virus during off-seasons, making eradication from a field a persistent challenge for farmers.

Management strategies focus on a multidimensional approach to minimize viral impact. This includes the implementation of rigorous phytosanitary practices, the use of virus-free planting stocks, and the aggressive management of whitefly populations using integrated pest management (IPM) techniques. Crop rotation and the removal of alternative host weeds are also essential components of an effective prevention program.