“…Potyviruses (SPFMV, SPVG, SPVC, SPV2) are spread by aphids and SPCSV and SPLCV by whiteflies, whereas SPLCV and SPPV are transmitted by seeds. In Europe, SPCSV, SPFMV, SPVG, and SPV2 have been reported in Spain (Trenado et al, 2007) and SPCSV, SPFMV, SPVC, and SPV2 in Portugal (EPPO, 2021; Varanda et al, 2015). Conventional resistance breeding is difficult due to the self‐incompatibility, heterozygosity, and hexaploidy of sweet potato (Loebenstein & Thottappilly, 2009).…”