Belowground influence of rhizobium inoculant and water hyacinth composts on yellow bean infested by aphis fabae and colletotrichum lindemuthianum under field conditions
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Date
2016
Authors
Naluyange, Victoria
Ochieno, Dennis M. W.
Wandahwa, Philip
Odendo, Martins
Maingi, John M.
Amoding, Alice
Ombori, Omwoyo
Mukaminega, Dative
Muoma, John
Journal Title
Journal ISSN
Volume Title
Publisher
Canadian Center of Science and Education
Abstract
Rhizobium inoculant has been developed for bean production in Lake Victoria basin. Two types of compost have
been developed, water hyacinth compost with cattle manure culture (H+CMC) or with effective microbes
(H+EM). Influence of Rhizobium and composts on Aphis fabae and Colletotrichum lindemuthianum were
investigated in the field. Rhizobium and hyacinth composts increased nodulation (×2 to 5); while Aphis fabae
population increased (×2) on Rhizobium-inoculated plants with H+EM. Incidence of C. lindemuthianum was
high in Rhizobium-inoculated plants. Plants that received diammonium phosphate (DAP) fertilizer had few
nodules, reduced germination, slow growth and low yields. In conclusion, the water hyacinth composts contain
beneficial microbes that promote root nodulation by Rhizobium, which is necessary for nitrogen fixation, while
enhancing tolerance to aboveground infestations by A. fabae and C. lindemuthianum. We raise questions on our
results to stimulate research, considering that bean breeding programs in Africa have mainly focused on
microbial pathogens, and not insect pests.
Description
Research paper
Keywords
Citation
Journal of Plant Studies; Vol. 5, No. 2; 2016 ISSN 1927-0461 E-ISSN 1927-047X