Pré-Publication, Document De Travail (Preprint/Prepublication) Année : 2019

Adverse effects of Bacillus thuringiensis bioinsecticide on non-target Drosophila species 1

Aurélie Babin
  • Fonction : Auteur
  • PersonId : 962842
Marie-Paule Nawrot-Esposito
  • Fonction : Auteur
Jean-Luc Gatti
Marylène Poirie

Résumé

Biopesticides based on Bacillus thuringiensis kurstaki (Btk) and israelensis (Bti) spores and toxins are widely used to control insect pests, increasing environmental risks to non-target biodiversity. Here, we tested for potential effects of larval ingestion of Bt commercial formulations on Drosophila species. Doses equivalent to those recommended for field application (⩽10^6 CFU/g of fly medium) had no effect whereas Btk doses 10 to 100-fold higher (10^7-10^8 CFU/g) altered the development (decreased emergence due to larval mortality and increased development time), and moderately influenced adult fitness-related traits. At the highest Btk and Bti dose (10^9 CFU/g), all larvae died before pupation. The impact of Btk formulations resulted from the spores/cleaved toxins synergy, but also additives. While recommended doses had no effect on non-target Drosophila species, the accumulation of Bt bioinsecticides in the environment could have adverse side-effects on the populations of these species and therefore their associated communities.

Fichier principal
Vignette du fichier
541847.full.pdf (1.28 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence
Loading...

Dates et versions

hal-02108184 , version 1 (24-04-2019)

Licence

Identifiants

Citer

Aurélie Babin, Marie-Paule Nawrot-Esposito, Jean-Luc Gatti, Marylène Poirie. Adverse effects of Bacillus thuringiensis bioinsecticide on non-target Drosophila species 1. 2019. ⟨hal-02108184⟩
165 Consultations
333 Téléchargements

Altmetric

Partager

  • More