Interactions between Nosema microspores and a neonicotinoid weaken honeybees (Apis mellifera) - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Environmental Microbiology Year : 2010

Interactions between Nosema microspores and a neonicotinoid weaken honeybees (Apis mellifera)

Cédric Alaux
Connectez-vous pour contacter l'auteur
Jean-Luc Brunet
Fanny Mondet
Luc Belzunces
Yves Le Conte

Abstract

Global pollinators, like honeybees, are declining in abundance and diversity, which can adversely affect natural ecosystems and agriculture. Therefore, we tested the current hypotheses describing honeybee losses as a multifactorial syndrome, by investigating integrative effects of an infectious organism and an insecticide on honeybee health. We demonstrated that the interaction between the microsporidia Nosema and a neonicotinoid (imidacloprid) significantly weakened honeybees. In the short term, the combination of both agents caused the highest individual mortality rates and energetic stress. By quantifying the strength of immunity at both the individual and social levels, we showed that neither the haemocyte number nor the phenoloxidase activity of individuals was affected by the different treatments. However, the activity of glucose oxidase, enabling bees to sterilize colony and brood food, was significantly decreased only by the combination of both factors compared with control, Nosema or imidacloprid groups, suggesting a synergistic interaction and in the long term a higher susceptibility of the colony to pathogens. This provides the first evidences that interaction between an infectious organism and a chemical can also threaten pollinators, interactions that are widely used to eliminate insect pests in integrative pest management
Fichier principal
Vignette du fichier
37923_20100727031949794_1.pdf (1.57 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive
Loading...

Dates and versions

hal-02666852 , version 1 (31-05-2020)

Licence

Identifiers

Cite

Cédric Alaux, Jean-Luc Brunet, Claudia Dussaubat, Fanny Mondet, Sylvie Tchamitchian, et al.. Interactions between Nosema microspores and a neonicotinoid weaken honeybees (Apis mellifera). Environmental Microbiology, 2010, 12 (3), pp.774 - 782. ⟨10.1111/j.1462-2920.2009.02123.x⟩. ⟨hal-02666852⟩
37 View
61 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More