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Rhizobium inoculants suppress emergence of the weed Striga gesnerioides in cowpea

dc.contributor.authorMu'az, W.A.
dc.contributor.authorDianda, M.
dc.contributor.authorBoukar, O.
dc.contributor.authorDieng, I.
dc.contributor.authorMohammed, G.S.
dc.contributor.authorBelko, N.
dc.contributor.authorTogola, A.
dc.contributor.authorMuhammad, H.
dc.contributor.authorKanampiu, F.
dc.contributor.authorGiller, K.
dc.contributor.authorVanlauwe, B.
dc.date.accessioned2022-02-01T10:33:19Z
dc.date.available2022-02-01T10:33:19Z
dc.date.issued2021
dc.identifier.citationMu'az, W.A., Dianda, M., Boukar, O., Dieng, I., Mohammed, G.S., Belko, N., ... & Vanlauwe, B. (2021). Rhizobium inoculants suppress emergence of the weed Striga gesnerioides in cowpea. Research Square, 467, 1-27.
dc.identifier.issn2693-5015
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7334
dc.description.abstractCowpea is a grain legume of major importance in sub-Saharan Africa where it is cultivated by smallholder farmers on poor soils and production is often constrained by the parasitic weed Striga gesnerioides. Experiments were conducted to assess the potential of rhizobium inoculation in mitigating Striga infestation and increasing cowpea productivity. We tested under basal P application and artificial S. gesnerioides inoculation the impact of cowpea genotypes (G) (nine Striga-resistant and 11 Striga– susceptible genotypes) and bradyrhizobium inoculation (N) (two bradyrhizobium strains USDA3384 and IRJ2180A, and uninoculated control) on Striga dynamics and cowpea yield. Additional treatments included N supplied as urea (with and without), and no input (i.e., soil inherent N and P) that served as negative check. A first experiment was carried out in potted sterile soils in the screen house excluding addition of N-fertilizers. Significant G x N interactions were observed in counts of nodule (P = 0.012), Striga attachment (P < 0.0001) and emergence (P = 0.005), and cowpea shoot growth (P = 0.016). Cowpea nodulated poorly across host lines, Striga counts were the lowest for resistant varieties with no emerged plants. Rhizobial inoculants depressed Striga counts with consistent differences found across cowpea genotypes. Inoculation with IRJ2180A performed the best against Striga attachment in resistant genotypes, and its emergence in susceptible genotypes. In the field trial, nodule numbers were lowest in cowpea without inputs (P < 0.0001). The G x N interaction was significant in emerged Striga plants (P < 0.0001). Resistant genotypes were free of emerged Striga while for susceptible ones, Striga emergence was the highest without any input addition. Significant G x N interaction was observed in cowpea grain yield (P < 0.0001). Yield response to inoculation was most obvious for resistant genotypes inoculated with the strain IRJ2180A (P = 0.0043). The integrated use of Striga-resistant cowpea lines and elite bradyrhizobium inoculant under moderate application of P-based fertilizer could be a promising approach for mitigating Striga infestation and increasing productivity.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-27
dc.language.isoen
dc.subjectCowpeas
dc.subjectStriga
dc.subjectGrain Legumes
dc.subjectSmallholders
dc.subjectGenotypes
dc.subjectProductivity
dc.titleRhizobium inoculants suppress emergence of the weed Striga gesnerioides in cowpea
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInstitut de l'Environnement et de Recherches Agricoles
cg.contributor.affiliationBayero University Kano
cg.contributor.affiliationWageningen University and Research Centre
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubCentral Africa Hub
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.researchthemeNatural Resource Management
cg.researchthemePlant Production and Health
cg.identifier.bibtexciteidMUAZ:2021
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCowpea
cg.iitasubjectFood Security
cg.iitasubjectGrain Legumes
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalResearch Square
cg.notesOpen Access Article; Published online: 26 May 2021
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.21203/rs.3.rs-358536/v1
cg.iitaauthor.identifierOusmane: 0000-0003-0234-4264
cg.iitaauthor.identifierAbou TOGOLA: 0000-0001-6155-8292
cg.iitaauthor.identifierFred Kanampiu: 0000-0002-2480-6813
cg.iitaauthor.identifierbernard vanlauwe: 0000-0001-6016-6027
cg.futureupdate.requiredNo
cg.identifier.volume467


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