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Potential of Cameroon-indigenous isolates of the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae as microbial control agents of the flea beetle Nisotra uniformis

dc.contributor.authorNiyibizi, I.A.B.
dc.contributor.authorHanna, R.
dc.contributor.authorKekeunou, S.
dc.contributor.authorMembang, G.
dc.contributor.authorFiaboe, K.
dc.contributor.authorMahot, H.C.
dc.contributor.authorAbang, A.F.
dc.contributor.authorKumar, P.L.
dc.contributor.authorFotso Kuate, A.
dc.date.accessioned2023-02-20T09:24:00Z
dc.date.available2023-02-20T09:24:00Z
dc.date.issued2023
dc.identifier.citationNiyibizi, I.A.B., Hanna, R., Kekeunou, S., Membang, G., Fiaboe, K., Mahot, H.C., ... & Fotso Kuate, A. (2023). Potential of Cameroon-indigenous isolates of the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae as microbial control agents of the flea beetle Nisotra uniformis. Biocontrol Science and Technology, 1-15.
dc.identifier.issn0958-3157
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8053
dc.description.abstractThe flea beetle Nisotra uniformis Jacoby is a widespread pest of malvaceous crops for which synthetic chemical insecticides remain the principal control tool, particularly in sub-Saharan Africa. With the ultimate aim of developing a microbial alternative for N. uniformis control, we conducted laboratory experiments (25 ± 1°C; 70 - 80% RH) to evaluate the biological attributes of three Cameroonian isolates of the entomopathogenic fungi Beauveria bassiana (Balsamo-Crivelli) Vuillemin and Metarhizium anisopliae sensu lato (Metchnikoff) Sorokin. Spore germination rates of the isolates varied from 0.5% after 4 hrs to 100% after 24 hrs on PDA medium, with MIITAC11.3.4 spores germinating fastest. Pathogenicity tests consisted of dipping adult beetles in conidial suspensions. All isolates were pathogenic to N. uniformis, with corrected mortalities varying between 23.3 - 86.7%. BIITAC-O-2 had the lowest LC50 at 5.17 × 106 conidia/ml, while MIITAC11.3.4 and BIITAC6.2.2 had LC50 at 4.11 × 107 conidia/ml, and 2.00 × 108 conidia/ml, respectively. BIITAC6.2.2 produced the shortest time to the highest mortality rate (1.17 days) and the shortest LT50 of 1.64 days but only at the highest concentration, followed by the two highest concentrations of MIITAC11.3.4 (LT50 at 3.43 and 5.70 days). The c parameter in the Weibull model showed that BIITAC-O-2 caused the highest rate of increase in mortality (2.42) at the highest concentration, followed by MIITAC11.3.4 (1.09) and BIITAC6.2.2 (0.50). The results of our study provide the basis for including N. uniformis in the ongoing development of BIITAC6.2.2 and MIITAC11.3.4 into biopesticide while continuing with further laboratory studies on BIITAC-O-2.
dc.description.sponsorshipGerman Federal Ministry of Economic Cooperation and Development
dc.format.extent1-16
dc.language.isoen
dc.subjectBiological Control
dc.subjectOkras
dc.subjectPathogenicity
dc.subjectSpore Germination
dc.subjectCameroon
dc.titlePotential of Cameroon-indigenous isolates of the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae as microbial control agents of the flea beetle Nisotra uniformis
dc.typeJournal Article
cg.contributor.crpMaize
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Yaounde I
cg.coverage.regionAfrica
cg.coverage.regionCentral Africa
cg.coverage.countryCameroon
cg.coverage.hubCentral Africa Hub
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeNatural Resource Management
cg.researchthemePlant Production and Health
cg.identifier.bibtexciteidNIYIBIZI:2023
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgribusiness
cg.iitasubjectDisease Control
cg.iitasubjectFarming Systems
cg.iitasubjectFood Security
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Health
cg.journalBiocontrol Science and Technology
cg.notesPublished online: 11 Feb 2023
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCopyrighted; all rights reserved
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1080/09583157.2023.2175784
cg.iitaauthor.identifierIngrid Bapfubusa Niyibizi: 0000-0001-5760-7709
cg.iitaauthor.identifierRachid Hanna: 0000-0002-5715-0144
cg.iitaauthor.identifierMEMBANG GERTRUDE: 0000-0002-5927-1724
cg.iitaauthor.identifierKomi Fiaboe: 0000-0001-5113-2159
cg.iitaauthor.identifierhermine mahot: 0000-0003-2101-3778
cg.iitaauthor.identifierAlbert ABANG: 0000-0002-2791-9557
cg.iitaauthor.identifierP. Lava Kumar: 0000-0003-4388-6510
cg.iitaauthor.identifierFotso Kuate, A.: 0000-0002-5247-7519
cg.futureupdate.requiredNo
cg.contributor.acknowledgementsWe thank Carole Mejane and Remy Ayo Ayo for their assistance during the execution of this study. The authors wish to thank Dr. Nguya Maniania, the editor, and two anonymous reviewers for their reviews and suggestions for the improvement of this manuscript.


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