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Etude multitrophique des effets de différents bio-insecticides sur Myzus Persicae (Sulzer) et Tuta Absoluta (Meyrick), ravageurs de solanacées et sur leur ennemi naturel Macrolophus Pygmaeus (Rambur)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Velde, Megane Van De |
| Copyright Year | 2017 |
| Abstract | Trehalose is one of the most important carbohydrates stocks in insects. This molecule can be transformed into glucose thanks to an enzyme called trehalase. Phloridzin, amygdalin and validamycin A are trehalase inhibitors. Some studies have shown their bio-insecticide potential. For this reason, these inhibitors were tested on two pests of Solanaceous, Myzus persicae (Sulzer) and Tuta absoluta (Meyrick), in order to assess their impact on mortality. Then, artificial diets were prepared and were given to them instead of natural diets. In the case of M. persicae, two concentrations (10 et 25 μg/ml) were tested. Only one significant difference was noted for all inhibitors with an amount of 25 μg/ml and after 48 hours. For experiments on T. absoluta, three concentrations of phloridzin (25, 50 and 100 μg/ml) were assessed and only one (100 μg/ml) was evaluated for amygdalin and validamycin A. In an integrated pest management (IPM) context, lethal impact of inhibitors was also studied on their common natural enemy, Macrolophus pygmaeus (Rambur), thanks to a multitrophic study including M. persicae. No inhibitor-dependent mortality was found in the case of T. absoluta nor M. pygmaeus. Then, two proteomic analyzes (2D-DIGE) were conducted on aphids to increase knowledges about mode of action of trehalase inhibitors. Firstly, a dissuasive effect of phloridzin was highlighted. Moreover, a decrease of energetic metabolism and disturbances at several metabolic pathways were found with the ingestion of amygdalin and validamycin A. Finally, tobacco plants were treated with these inhibitors (25 μg/ml) before or after M. persicae infestation. Validamycin A treatment after infestation was the only one to show a significant difference in terms of mortality. Key-words: aphid, Tuta absoluta, Macrolophus pygmaeus, trehalase inhibitors, 2D-DIGE |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://matheo.uliege.be/bitstream/2268.2/3093/7/TFE-Van_De_Velde_Megane-20111399.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
