Composition of Strawberry Floral Volatiles and their Effects on Behavior of Strawberry Blossom Weevil, Anthonomus rubi
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- Composition of Strawberry Floral Volatiles and their Effects on Behavior of Strawberry Blossom Weevil, Anthonomus rubi
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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 ananassaandFragaria vesca) to identify compounds that might be used to improve the attractiveness of existing lures for SBW. Floral emissions ofF. x a.varieties Sonata, Beltran, Korona, and ofF. 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 ofF. x ananassa.andF. vescawere dominated by aromatic compounds and terpenoids, with 4-methoxybenzaldehyde (p-anisaldehyde) and alpha-muurolene the major compounds produced by the two species, respectively. Multi-dimensional scaling analyses separated the blends of the two species and explained differences betweenF. vescagenotypes and, to some degree, variation betweenF. x ananassavarieties 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 fromF. x ananassaandF. vescaflowering 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 fromF. viridis, previously found to synergize the attractiveness of the SBW aggregation pheromone in field studies.
Originalsprog | Engelsk |
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Artikelnummer | 289 |
Tidsskrift | Journal of Chemical Ecology |
Vol/bind | 46 |
Sider (fra-til) | 1069-1081 |
Antal sider | 13 |
ISSN | 0098-0331 |
DOI | |
Status | Udgivet - 2020 |
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