The occurrence of bean common mosaic necrosis virus in wild and forage legumes in Uganda

• Published in: Plant pathology Vol. 46; no. 1; pp. 95 - 103
• Main Authors: SENGOOBA, T. N., SPENCE, N. J., WALKEY, D. G. A., ALLEN, D. J., FEMI LANA, A.
• Format: Journal Article
• Language: English
• Published: Oxford, U.K. and Cambridge, USA Blackwell Science Ltd 01.02.1997; Blackwell
• Subjects: bean common mosaic necrosis virus; Biological and medical sciences; Centrosema pubescens; Crotalaria; Fundamental and applied biological sciences. Psychology; Generalities. Techniques. Transmission, epidemiology, ecology. Antiviral substances, control; Phaseolus lunatus; Phytopathology. Animal pests. Plant and forest protection; Plant viruses and viroids; Uganda; East Africa; TROPICAL AFRICA; Africa; Plant pathogen; Occurrence frequency; Biogeography; Tropical crop; Bean common mosaic virus; Epidemiology; Virology; Virus; Characterization; Leguminosae; Dicotyledones; Pathotype; Host plant; Angiospermae; Isolate; Wild plant; Spermatophyta; Potyvirus; Fodder crop; Potyviridae
• ISSN: 0032-0862; 1365-3059
• DOI: 10.1046/j.1365-3059.1997.d01-12.x

Bean common mosaic necrosis virus (BCMNV) was isolated from Centrosema pubescens, Crotalaria incana, Lablab purpureus, Phaseolus lunatus, Senna bicapsularis, S. sophera, Vigna vexillata and an unidentified Crotalaria species growing in Uganda. Thirteen distinct isolates were characterized using symptoms, pathogenicity in differential bean cultivars, serology, immunosorbent electron microscopy, and seed and aphid transmission. Some isolates conformed with the characteristics of previously described strains of BCMNV but others showed novel properties. All isolates reinfected the natural host from which they were obtained. The origin and ecological significance of these isolates is discussed.