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Antagonist effects of the leek Allium porrum as a companion plant on aphid host plant colonization

Abstract : Combining a non-host plant (companion plant or CP) with a target cultivated plant is considered as a promising strategy to reduce pest pressure. Among the companion plants (CP) commonly used in integrated systems, those belonging to the Amaryllidaceae family (chives, garlic, onion, leek) exhibit characteristics related to certain volatile organic compounds (VOCs) with promising repellent potentialities. The aim of this work was to investigate the potential disruption of sweet pepper (host plant) colonization by the green peach aphid (Myzus persicae) when exposed to leek (Allium porrum) as a CP. Retention/dispersion, EPG and clip-cage/Petri dish laboratory experiments were thus performed to study the effect of leek VOCs on aphid settlement/migration, feeding behavior and life history traits parameters, respectively. This work revealed that leek as a CP had a negative effect on aphid feeding behavior, by disturbing the balance between phloem and xylem sap ingestion, but had no influence concerning aphid settlement. Surprisingly, leek as a CP triggered some unexpected probiotic effects on certain life history traits such as aphid survival, biomass, and fecundity, suggesting a possible hormetic effect of leek VOCs on aphid physiology. The possibility of experience-induced preference of aphids for leek VOCs was also discussed.
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https://hal-u-picardie.archives-ouvertes.fr/hal-03615042
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Soumis le : lundi 21 mars 2022 - 11:44:52
Dernière modification le : jeudi 25 août 2022 - 14:06:23

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Xavier Baudry, Geraldine Doury, Aude Couty, Yvelise Fourdrain, Robin Van Havermaet, et al.. Antagonist effects of the leek Allium porrum as a companion plant on aphid host plant colonization. Scientific Reports, Nature Publishing Group, 2021, 11 (1), ⟨10.1038/s41598-021-83580-8⟩. ⟨hal-03615042⟩

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