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Master Thesis

Utilisation de G. macrorrhizum en tant que plante compagne dans la lutte contre les pucerons ravageurs

Abstract : The combination of a companion plant with a cultivated plant is considered as an interesting strategy to reduce pest pressure and hence, the use of pesticides. Although several plants from the Alliaceae and Lamiaceae families are known to be efficient companion plants against aphid pests, only a few plants of the Geraniaceae family have been studied so far. The aim of this work was to investigate the potential effects of Geranium macrorrhizum as a companion plant on the colonization of sweet pepper (Capsicum annuum, Solanaceae) by the green peach aphid (Myzus persicae). Aphid’s feeding behavior, orientation behavior and life history traits were assessed on sweet pepper using EPG (ElectroPenetroGraphy), plant preference tests and clip-cage laboratory bioassays, respectively. They were compared in absence or presence of G. macrorrhizum whose leaves had been mechanically stimulated or not. This study revealed that G. macrorrhizum as a companion plant negatively impacted the feeding behavior, fecundity and survival rate of M. persicae on sweet pepper. The effects were exacerbated when G. macrorrhizum leaves were mechanically stimulated. However, G. macrorrhizum used as a companion plant does not impact M. persicae orientation. Our results bring new insights into the use of novel companion plants to regulate aphid pest populations.
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Master Thesis
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Submitted on : Tuesday, December 14, 2021 - 3:35:56 PM
Last modification on : Friday, December 17, 2021 - 3:43:28 AM


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  • HAL Id : dumas-03480229, version 1



Jean Dorland. Utilisation de G. macrorrhizum en tant que plante compagne dans la lutte contre les pucerons ravageurs. Sciences du Vivant [q-bio]. 2021. ⟨dumas-03480229⟩



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