Mozūraitis, Raimondas ORCID: https://orcid.org/0000-0002-1719-2294, Hall, David ORCID: https://orcid.org/0000-0002-7887-466X, Trandem, Nina, Ralle, Baiba, Tunström, Kalle, Sigsgaard, Lene, Baroffio, Catherine, Fountain, Michelle, Cross, Jerry, Wibe, Atle and Borg-Karlson, Anna-Karin (2020) Composition of strawberry floral volatiles and their effects on behavior of strawberry blossom weevil, anthonomus rubi. Journal of Chemical Ecology, 46 (11-12). pp. 1069-1081. ISSN 0098-0331 (Print), 1573-1561 (Online) (doi:10.1007/s10886-020-01221-2)

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Abstract

The strawberry blossom weevil (SBW), Anthonomus rubi, is a major pest in strawberry fields throughout Europe. Traps baited with aggregation pheromone are used for pest monitoring. However, a more effective lure is needed. For a number of pests, it has been shown that the attractiveness of a pheromone can be enhanced by host plant volatiles. The goal of this study was to explore floral volatile blends of different strawberry species (Fragaria x ananassa and Fragaria vesca) to identify compounds that might be used to improve the attractiveness of existing lures for SBW. Floral emissions of F. x a. varieties Sonata, Beltran, Korona, and of F. vesca, were collected by both solid-phase microextraction (SPME) and dynamic headspace sampling on Tenax. Analysis by gas chromatography/mass spectrometry showed the floral volatiles of F. x ananassa. and F. vesca were dominated by aromatic compounds and terpenoids, with 4-methoxybenzaldehyde (p-anisaldehyde) and α-muurolene the major compounds produced by the two species, respectively. Multi-dimensional scaling analyses separated the blends of the two species and explained differences between F. vesca genotypes and, to some degree, variation between F. x ananassa varieties In two-choice behavioral tests, SBW preferred odors of flowering strawberry plants to those of non-flowering plants, but weevils did not discriminate between odors from F. x ananassa and F. vesca flowering plants. Adding blends of six synthetic flower volatiles to non-flowering plants of both species increased the preference of SBW for these over the plants alone. When added individually to non-flowering plants, none of the components increased the preference of SBW, indicating a synergistic effect. However, SBW responded to 1,4-dimethoxybenzene, a major component of volatiles from F. viridis, previously found to synergize the attractiveness of the SBW aggregation pheromone in field studies.

Item Type:	Article
Uncontrolled Keywords:	,nthonomus rubi, fragaria x ananassa, fragaria vesca, floral odors, semiochemicals, pest control
Subjects:	S Agriculture > SB Plant culture
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > Natural Resources Institute Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department Faculty of Engineering & Science > Natural Resources Institute > Chemical Ecology Research Group
Last Modified:	20 Jan 2021 12:22
URI:	http://gala.gre.ac.uk/id/eprint/30892

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