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Thermal tolerance of Cameroonian fungal isolates

Biology and virulence of entomopathogens are known to be affected by environmental conditions. In this study aiming to select thermo-tolerant isolates for biopesticides development against Cosmopolites sordidus, germination, mycelia growth and sporulation of six local Cameroonian isolates of two promising microbial agents Beauveria bassiana and Metarhizium anisopliae were assessed under seven different thermal conditions (13, 15, 20, 25, 29 33 and 37 °C). The Transmission potential was also determined at 25 ± 1 °C by dipping adult weevil of four vectors ratios (0, 10, 30 and 50 %) with conidial suspensions labelled 3.2 x108 conidia/ml. Incubation temperature and isolates affected significantly germination, mycelia growth and conidia production. All isolates had large thermal tolerance ranges (13–33 °C) except MIITAC6.4.2 (20-29 °C) which had the narrowest range. Horizontal transmission resulted in mortality of non-inoculated weevils from 4.63 ± 1.77 to 53.3 ± 11.9 %. . The isolate BIITAC6.2.2 exhibited high auto-dissemination potential and high conidia yield in cadavers. This results demonstrate the potential use of these isolates for biopesticides development against C. sordidus in Central Africa.

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Creator Membang, Gertrude
Creator Affiliation International Institute of Tropical Agriculture (IITA)
Creator email G.Membang@cgiar.org
Creator ID Type ORCID
Creator ID 0000-0002-5927-1724
Subject Vocab (AGROVOC/GACS/CAB) Conidia,Incubation,Temperature,Fungi,Inoculation,Weevils,Colony,Photoperiod,Insect,Banana
Subject(s) Banana weevil,Environmental physiology
Publisher International Institute of Tropical Agriculture (IITA)
Contributor Person 1 Zachee Ambang
Contributor Person 1 Affiliation
Contributor Person 1 email
Contributor Person 2 Hermine Mahot
Contributor Person 2 Affiliation International Institute of Tropical Agriculture (IITA)
Contributor Person 2 email H.Mahot@cgiar.org
Contributor Person 3 Apollin Fotso Kuate
Contributor Person 3 Affiliation International Institute of Tropical Agriculture (IITA)
Contributor Person 3 email A.Fotso@cgiar.org
Contributor Person 4 Komi Kouma Mokpokpo Fiaboe
Contributor Person 4 Affiliation International Institute of Tropical Agriculture (IITA)
Contributor Person 4 email K.Fiaboe@cgiar.org
Contributor Person 5 Rachid Hanna
Contributor Person 5 Affiliation International Institute of Tropical Agriculture (IITA)
Contributor Person 5 email r.hanna@cgiar.org
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Contributor Project Lead Organisation Center International Institute of Tropical Agriculture (IITA)
Contributor Project Lead Center International Institute of Tropical Agriculture (IITA)
Contributor Initiative/CRP CGIAR Research Program on Roots, Tubers and Banana(RTB)
Contributor Partner Not applicable
Contributor Donor IITA/Core
Contributor Project Development of Biopesticides against banana weevil
Project ID
Contributor Affiliation International Institute of Tropical Agriculture (IITA)
Open-Access status Open Access
Production Date 2020-02-12
Embargo End Date 2021-02-12
Content Type Dataset
File Format csv
Identifier Type DOI
Identifier https://doi.org/10.25502/v2pj-g452/d
Identifier Citation
Source Development of Biopesticides against banana weevil
Language English
Relation Not applicable
Agroecological Zone Humid warm tropics
Coverage Region Sub-Saharan Africa
Coverage country Cameroon
Coverage Admin Unit Not applicable
Coverage Y (Latitude) 3.84803
Coverage X (Longitude) 11.50208
Coverage Start Date
Coverage End Date
Contact Membang, Gertrude
Contact Email G.Membang@cgiar.org
Restriction CC-BY 4.0
Email Permission None
Rights CC-BY 4.0