Behavioral response of the greenhouse whitefly (Trialeurodes vaporariorum) to plant volatiles of Ocimum basilicum and Tagetes minuta

Kiamba Matu Francis, Kananu Murungi Lucy, Mohamed Samira A., Deletre Emilie. 2021. Behavioral response of the greenhouse whitefly (Trialeurodes vaporariorum) to plant volatiles of Ocimum basilicum and Tagetes minuta. Chemoecology, 31 : 47-62.

Quartile : Q3, Sujet : ECOLOGY / Quartile : Q4, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : The use of chemical pesticides as a main pest control strategy has been highly criticised due to environmental pollution and negative effects on natural enemies of pests. In modern farming, it is essential to implement integrated pest management approaches that seek to control insect pests without causing environmental damage, e.g. the use of companion plants. Basil and Mexican marigold are often used as companion plants to attract greenhouse whiteflies, hence reducing damage to solanaceous crops, but the mechanism and role of volatile cues in crop protection strategies are unknown. This study found that both flowering basil and marigold were preferred to tomato by the greenhouse whitefly (Trialeurodes vaporariorum) in Y-tube olfactometer bioassays. PCA revealed that some volatiles were more correlated to one stage than to another. The dominant volatile constituents of Mexican marigold are limonene, dihydrotagetone, (Z)-β-ocimene, α-pinene, (Z)-3-hexenyl acetate, and those from basil are linalool, 1,8-cineole, eugenol and β-elemene. Among these dominant compounds, 1,8-cineole and (Z)-3-hexenyl acetate elicited strong attraction in greenhouse whitefly at 0.01%, whereas (Z)-β-ocimene and linalool elicited strong repellence at 0.1% and 1% dosages. This suggested that the basil flowering stage attraction is due to 1,8-cineole. These volatiles demonstrated potential as lures or bio-repellents and could be used in a “push–pull” semiochemical approach for greenhouse whitefly management.

Mots-clés Agrovoc : culture associée, plante de culture associée, Tagetes minuta, Ocimum basilicum, gestion intégrée des ravageurs, ravageur des plantes, Trialeurodes vaporariorum, lutte anti-insecte, Tagetes, lutte antiravageur, Calendula, Trialeurodes, lutte intégrée, Ocimum, pesticide

Mots-clés libres : Basil, Mexican marigold, Volatiles, Y-tube olfactometer

Agences de financement hors UE : Agence Nationale de la Recherche, Centre de Coopération Internationale en Recherche Agronomique pour le Développement

Projets sur financement : (FRA) Utilisation de composés sémiochimiques combinée à de la protection physique pour concevoir un système de production écologiquement intensif.

Auteurs et affiliations

• Kiamba Matu Francis, Jomo Kenyatta University of Agriculture and Technology (KEN) - auteur correspondant
• Kananu Murungi Lucy, Jomo Kenyatta University of Agriculture and Technology (KEN)
• Mohamed Samira A., ICIPE (KEN)
• Deletre Emilie, CIRAD-PERSYST-UPR HortSys (KEN) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/605775/)

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