African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Review

Viruses infecting common bean (Phaseolus vulgaris L.) in Tanzania: A review on molecular characterization, detection and disease management options

Beatrice Mwaipopo
  • Beatrice Mwaipopo
  • Mikocheni Agricultural Research Institute, P. O. Box 6226, Dar es Salaam, Tanzania.
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Susan Nchimbi-Msolla
  • Susan Nchimbi-Msolla
  • Department of Crop Science and Horticulture, Sokoine University of Agriculture, P. O. Box 3005, Morogoro, Tanzania.
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Paul Njau
  • Paul Njau
  • Department of Crop Science and Horticulture, Sokoine University of Agriculture, P. O. Box 3005, Morogoro, Tanzania.
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Fred Tairo
  • Fred Tairo
  • Mikocheni Agricultural Research Institute, P. O. Box 6226, Dar es Salaam, Tanzania.
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Magdalena William
  • Magdalena William
  • Agricultural Research Institute - Maruku, P. O. Box 127, Bukoba, Tanzania.
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Papias Binagwa
  • Papias Binagwa
  • Agricultural Research Institute - Selian, P. O. Box 6024, Arusha, Tanzania.
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Elisiana Kweka
  • Elisiana Kweka
  • Mikocheni Agricultural Research Institute, P. O. Box 6226, Dar es Salaam, Tanzania.
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Michael Kilango
  • Michael Kilango
  • Agricultural Research Institute - Uyole, P. O. Box 400, Mbeya, Tanzania.
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Deusdedith Mbanzibwa
  • Deusdedith Mbanzibwa
  • Mikocheni Agricultural Research Institute, P. O. Box 6226, Dar es Salaam, Tanzania.
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  •  Received: 16 February 2017
  •  Accepted: 04 April 2017
  •  Published: 04 May 2017

Abstract

Common bean (Phaseolus vulgaris L.) is a major legume crop, serving as a main source of dietary protein and calories and generating income for many Tanzanians. It is produced in nearly all agro-ecological zones of Tanzania. However, the average yields are low (<1000 kg/ha), which is attributed to many factors including virus diseases. The most important viruses of common bean in Tanzania are Bean common mosaic virus (BCMV) and Bean common mosaic necrosis virus (BCMNV) but other viruses have also been reported. There has never been a review of common bean virus diseases in the country, and the lack of collated information makes their management difficult. Therefore, this review focuses on (1) occurrence of different viruses of common bean in Tanzania, (2) molecular characterization of these viruses, (3) detection tools for common bean viruses in Tanzania and (4) available options for managing virus diseases in the country. Literature and nucleotide sequence database searches revealed that common bean diseases are inadequately studied and that their causal viruses have not been adequately characterized at the molecular level in Tanzania. Increased awareness on common bean virus diseases in Tanzania is expected to result into informed development of strategies for management of the same and thus increased production, which in turn has implication on nutrition and income.

 

Key words: Bean common mosaic virus (BCMV), Bean common mosaic necrosis virus (BCMNV), common bean viruses, Tanzania, virus molecular detection.