One SPCSV strain is unique because it has the ability to interact with these other viruses, such as the commonly occurring, aphid-transmitted Sweetpotato feathery mottle virus (SPFMV). This interaction leads to rapid multiplication of SPFMV virus particles within the infected plant, which is known as a ‘synergistic reaction’ or ‘complex virus disease’, resulting in Sweetpotato virus disease (SPVD). Symptoms of SPVD are severe stunting and yellowing, with reduction in yield