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Nosema ceranae detection in yellow-legged hornet, Vespa Velutina Nigrithorax, in the norwest of Spain
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Abstract(s)
The Vespa velutina nigrithorax is an invasive hornet from Asia that is causing significant concern for its impact on the European beekeeping sector. Its high adaptability and reproductive capacity have enabled the registration of over 50,000 nests in Galicia (northwest Spain) in 2023. It has been estimated that more than 20,000 individuals may emerge from each colony. This hornet consumes large quantities of honey bees in apiaries to satisfy the protein needs of its larvae. It has been demonstrated that this hornet can contain various pollinator pathogens after consuming its preys. The microsporidium Nosema provides a useful illustration of this. N. ceranae is a pathogen that causes a disease called nosemosis, which infects adult honey bees and contributes to colony depopulation. The presence of N. ceranae in V. velutina could have an impact on the dynamics of native host pathogens and contribute to the spread of this parasite. Therefore, there is a need for
further knowledge on the presence of N. ceranae in V. velutina. A total of 62 individuals of V. velutina were collected from 11 apiaries located in different municipalities of Galicia to analyze the presence of N. ceranae. After DNA extraction, N. ceranae was determined in the V. velutina specimens by PCR amplification. N. ceranae was detected in five of the 11 apiaries (Culleredo, San Sadurniño, Gondomar, Fonsagrada, and Sergude). In these apiaries, nine hornets were found to be positive for N. ceranae. The results of this study provide information on the presence of N. ceranae in V. velutina, which is likely to have been acquired from honey bee consumption. This study suggests that V. velutina may contribute to the spread of this
pathogen, which could represent a potential long-term risk for apiaries.
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Pedagogical Context
Citation
Rodriguez-Flores, Maria Shantal; Lopes, Ana; Diéguez-Antón, Ana; Seijo-Coello, M. Carmen; Pinto, M. Alice (2024). Nosema ceranae detection in yellow-legged hornet, Vespa Velutina Nigrithorax, in the norwest of Spain. In EURBEE 2024: 10th European Conference of Apidology. Tallinn
Publisher
Estonian University of Life Sciences