First report of sweet potato feathery mottle virus infecting Amaranthus blitum in China.
Sweet potato feathery mottle virus (SPFMV) is the most common viral agent of cultivated sweet potato worldwide. In April 2019, seven plants of the three most common weed species, namely, Amaranthus blitum (four), Convolvulus arvensis (two) and Chenopodium album (one), were randomly collected in a field planting sweet potato seedlings in Xinxiang, Henan Province, China. SPFMV was tested in all samples by RT-PCR with a SPFMV-specific primer set. The presence of SPFMV in A. blitum was further confirmed by a nitrocellulose membrane enzyme-linked immunosorbent assay with rabbit polyclonal anti-SPFMV antibodies. This is thought to be the first report of SPFMV infecting A. blitum.