First report of bean common mosaic virus infecting showy rattlepod and phasey bean plants in Brazil

Showy rattlepod (Crotalaria spectabilis Roth.) and phasey bean [Macroptilium lathyroides (L.) Urb.] plants exhibiting symptoms of a possible virus infection were found in Piracicaba municipality, Sao Paulo State, Brazil. Flexuous filamentous particles and cytoplasmatic inclusions typical of potyvirus infection were observed in leaf extracts and cells of symptomatic leaves, respectively, by transmission electron microscopy. Total RNA was extracted from the leaves of symptomatic plants, and RT-PCR followed by nucleotide sequencing of the amplicons showed that both plants were infected with bean common mosaic virus (BCMV). The potyvirus was mechanically transmitted to healthy plants of showy rattlepod, phasey bean, and sunn hemp (Crotalaria junceae L.). Myzus persicae transmitted the virus from both species of infected plants to healthy plants of common beans (Phaseolus vulgaris L.). This is the first report of BCMV infecting showy rattlepod and phasey bean plants in Brazil.