Susceptibility of the Western Honey Bee Apis Mellifera and the African Stingless Bee Meliponula Ferruginea (Hymenoptera: Apidae) to the Entomopathogenic Fungi Metarhizium Anisopliae and Beauveria Bassiana
Omuse, Evanson R
Wagacha, John M
Ong'amo, George O
Lattorff, H Michael G
Mohamed, Samira A
Akutse, Komivi S
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This study assessed the nontarget effect of entomopathogenic fungi on the Western honey bee Apis mellifera L. and the African stingless bee Meliponula ferruginea Cockrell (Hymenoptera: Apidae). Pathogenicity of five Metarhizium anisopliae (ICIPE 7, ICIPE 20, ICIPE 62, ICIPE 69, and ICIPE 78) (Metschnikoff) Sorokin (Hypocreales: Clavicipitaceae) and one of Beauveria bassiana (ICIPE 284) (Balsamo) Vuillemin (Hypocreales: Cordicipitaceae) isolates were evaluated on bees at 108 conidia/ml. Conidial acquisition was evaluated immediately after exposure. Apis mellifera acquired more conidia (2.8 × 104-1.3 × 105 conidia per bee) compared to M. ferruginea (1.1 × 104-2.3 × 104 conidia per bee). In the bioassay with A. mellifera, ICIPE 7, ICIPE 20, and ICIPE 69 moderately reduced the survival by 16.9, 17.4, 15.3%, with lethal times LT10 = 7.4, 7.6, 8.1 d and LT25 = 8.7, 10.0, 9.9 d, respectively. The three isolates caused A. mellifera mycosis of 11.6-18.5%. None of the isolates had a significant effect on M. ferruginea. The tested isolates are nontoxic to bees according to the International Organization of Biological Control (IOBC) classification. However, the effect of ICIPE 7, ICIPE 20, and ICIPE 69 merits further studies on bee colonies, especially those of A. mellifera, under field conditions.
CitationOmuse ER, Niassy S, Wagacha JM, Ong'amo GO, Lattorff HMG, Kiatoko N, Mohamed SA, Subramanian S, Akutse KS, Dubois T. Susceptibility of the Western Honey Bee Apis mellifera and the African Stingless Bee Meliponula ferruginea (Hymenoptera: Apidae) to the Entomopathogenic Fungi Metarhizium anisopliae and Beauveria bassiana. J Econ Entomol. 2022 Feb 9;115(1):46-55. doi: 10.1093/jee/toab211. PMID: 35139218; PMCID: PMC8827312.
University of Nairobi
RightsAttribution-NonCommercial-NoDerivs 3.0 United States
- Faculty of Health Sciences (FHS) 
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