African Journal of Plant Science 1996-0824 Academic Journals 10.5897/AJPS2020.2040 Jimu F. Mapuranga R. Mubvekeri W. Kutywayo D. * E-mail: fjimu@yahoo.co.uk 2025 31 07 2025 06 07 2020 11 09 2020 19 3 51 57 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/AJPS/article-abstract/422D6A473495 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/AJPS/article-full-text-pdf/422D6A473495 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16