The occurrence of bean common mosaic virus inwild and forage legume species in Uganda

Sengooba, T.N.K.; Walkey, D.G.A.; Spence, Nicola J.; Allen, David J.; Lana, Allan Femi. 1994. The occurrence of bean common mosaic virus inwild and forage legume species in Uganda. In: Allen, David J.; Buruchara, Robin A. (eds.). Pan-African Working Group Meeting on Bacterial and Virus Diseases of Common Bean (1994, Kampala, Uganda). Proceedings. Centro Internacional de Agricultura Tropical (CIAT), Network on Bean Resarch in Africa, Kampala, UG. p. 11-26. (CIAT African workshop series no. 34)

Necrosis inducing BCMV isolates were obtained from a range of wild and forage legume species growing in Uganda. Thirteen distinct isolates were identified on the bases of symptoms, pathogenicity in bean differential cultivars, serology, immunosorbent electron microscopy, seed-and aphid-transmission. Some isolates conformed with the characteristics of previously described strains but others showed novel properties. Two isolates (429 and 472) caused necrsois inI-gene carrying bean cultivars but gave negative tests against 1-2 monoclonal antibodies specific for "A" serotypes of BCMV. All isolates reinfected the natural host from which they were obtained. The origin and ecological significance of these isolates is discussed. (RA)