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properties of a virus isolated from vernonia amygdalina del. in lagos, nigeria.a previously uncharacterized virus tentatively named vernonia green vein-banding virus (vgvbv) was isolated from vernonia amygdalina del. ("bitterleaf") from lagos, nigeria. the virus was mechanically transmissible but had a narrow host range restricted to nicotiana benthamiana, chenopodium quinoa and c. amaranticolor. it was also transmissible in a non-persistent manner by myzus persicae. the virus was purified from n. benthamiana and about 750 nm long flexuous rod-shaped particles were observe ...200415745049
a mosaic disease of senna hirsuta induced by a potyvirus in nigeria.a virus inducing mosaic and severe leaf malformation, isolated from senna hirsuta in nigeria, was studied. the virus had a rather narrow host range, infecting a few species in caesalpinaceae, chenopodiaceae and fabaceae families. the virus was widespread in southern nigeria with prevalence ranging from 74% to 86.4% in some locations. it was transmitted mechanically and in a non-persistent manner by myzuspersicae, aphis craccivora and a. spiraecola. there was no evidence of transmission by seeds. ...200111719985
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