Abstract
The behavioural responses of adult female western flower thrips, Frankliniella occidentalis (Pergande) to volatiles from meadow-sweet (Filipendula ulmaria), bay laurel (Laurus nobilis) and sage (Salvia officinalis) were investigated in laboratory bioassays. Volatiles collected by entrainment of a solvent extract of F. ulmaria were more attractive than was the original extract. Frankliniella occidentalis was also significantly attracted to volatiles from L. nobilis and S. officinalis. Analysis by gas chromatography and mass spectrometry identified 1,8-cineole (eucalyptol) as one of the main volatile components of all three plant species. In coupled gas chromatography-electroantennography studies with F. ulmaria, both 1,8-cineole and methyl salicylate elicited responses from F. occidentalis. Eucarvone was identified as the major component of F. ulmaria volatiles, but showed no electrophysiological activity. Behavioural responses of thrips to a range of concentrations of 1,8-cineole and methyl salicylate were tested using a modified Pettersson ’star’ olfactometer. 1,8-Cineole showed some attractant activity for the thrips at 0.01 mg, but methyl salicylate was repellent at all the concentrations tested.
Résumé
La réponse comportementale de femelles adultes de thrips (Frankliniella occidentalis) aux émissions volatiles de trois plantes aromatiques, la filipendule (Filipendula ulmaria), le laurier-sauce (Laurus nobilis) et la sauge (Salvia officinalis), a été étudiée dans des essais au laboratoire. Les produits volatils obtenus par collecte d’effluves d’un extrait par solvant de F. ulmaria se sont montrés plus attractifs que l’extrait original. Frankliniella occidentalis a aussi été attiré significativement par les émissions volatiles de L. nobilis et S. officinalis. Des analyses par Chromatographie en phase gazeuse et spectrométrie de masse ont permis d’identifier le 1,8-cineole (eucalyptol) comme l’un des composés volatils majeurs des trois espèces végétales. Dans des études par couplage Chromatographie en phase gazeuse-électroantennographie, avec un extrait de F. ulmaria, le 1,8-cineole et le methyl salicylate ont tous deux induit des réponses chez F. occidentalis. L’eucarvone a été identifié comme le composé majoritaire des émissions volatiles de F. ulmaria, mais n’a induit aucune activité électrophysiologique. Les réponses comportementales des thrips à une gamme de concentrations de 1,8-cineole et de methyl salicylate ont été évaluées dans un olfactomètre de Pettersson modifé. Le 1,8-cineole a induit une certaine attraction chez les thrips à la concentration de 0,01 mg, mais le methyl salicylate a été répulsif à toutes les concentrations testées.
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Chermenskaya, T.D., Burov, V.N., Maniar, S.P. et al. Behavioural Responses of Western Flower Thrips, Frankliniella occidentalis (Pergande), to Volatiles from Three Aromatic Plants. Int J Trop Insect Sci 21, 67–72 (2001). https://doi.org/10.1017/S1742758400020063
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DOI: https://doi.org/10.1017/S1742758400020063
Key Words
- thrips
- Frankliniella occidentalis
- volatiles
- Filipendula ulmaria
- Laurus nobilis
- Salvia officinalis
- attractant
- repellent
- electroantennogram
- 1,8-cineole
- methyl salicylate
- eucarvone