Repellency potential of tomato herbivore-induced volatiles against the greenhouse whitefly (Trialeurodes vaporariorum) (Hemiptera: Aleyrodidae)

Deletre Emilie, Matu Francis Kiamba, Murungi Lucy Kananu, Mohamed Samira A.. 2022. Repellency potential of tomato herbivore-induced volatiles against the greenhouse whitefly (Trialeurodes vaporariorum) (Hemiptera: Aleyrodidae). Journal of Economic Entomology, 115 (2) : 565-572.

Résumé : The greenhouse whitefly, Trialeurode vaporariorum, is among the key pests of tomato (Solanum lycopersicum) in sub-Saharan Africa with Tuta absoluta, spider mite, thrips, and fruitworms. To understand the interaction between the pest and the plant's herbivory-induced plant volatile (HIPVs), we investigated the repellency of four tomato cultivars (Kilele F1, Assila F1, Red Beauty F1, and Nemonneta F1) upon infestation by Trialeurode vaporariorum. We analyzed the behavioral response of T. vaporariorum to infested and uninfested tomato plants of these cultivars using olfactory bioassays followed by gas chromatography–mass spectrometry (GC–MS) analyses of emitted volatiles. Trialeurode vaporariorum was attracted to uninfested plants of all four tomato cultivars. However, two cultivars Kilele F1 and Red Beauty F1 were no longer attractive to the whitefly when they were already infested by the pest. GC–MS analyses identified 25 compounds, 18 monoterpenes, 3 sesquiterpenes, 2 xylenes, 1 aldehyde, and 1 carboxylic compound in the 4 uninfested and infested cultivars. Based on the insects' behavioral response, 1,8-cineole, p-cymene, and limonene did not attract T. vaporariorum at varying concentrations when combined with Red Beauty F1, the most attractive tomato cultivar. This repellence behavioral response can be used as a basis for improvement of other vegetable crops for the management of arthropod pests as for odor masking technique.

Mots-clés Agrovoc : répulsif pour animaux nuisibles, ravageur des plantes, Trialeurodes vaporariorum, Trialeurodes, acarien nuisible, Tuta absoluta, Solanum lycopersicum

Mots-clés libres : Olfactometer, GC–MS, HIPVs, Repellent, IPM

Classification Agris : H01 - Protection des végétaux - Considérations générales
H10 - Ravageurs des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agences de financement hors UE : Agence Nationale de la Recherche, University of Pretoria, National Research Foundation

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

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

Source : Cirad-Agritrop (https://agritrop.cirad.fr/606402/)

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