Volatiles functioning as host cues in a blend become nonhost cues when presented alone to the black bean aphid

Webster, Ben; Bruce, Toby J. A.; Pickett, John A.; Hardie, Jim

doi:10.1016/j.anbehav.2009.11.028

Cited by 220 publications

(197 citation statements)

References 32 publications

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“…The notion that ecologically relevant blends may be specially processed is supported by a recent study on host detection in the black bean aphid Aphis fabae; this aphid is repelled by single constituents of its host blend but strongly attracted by the full blend (Webster et al, 2010). In contrast to these studies, we did not attempt to mimic naturally occurring odor blends, but, rather, tested ecologically meaningless mixtures; this was done to empirically derive a mechanistic zero-hypothesis against which responses towards ecologically relevant blends may be tested in the future.…”

Section: The Valence Of Odor Mixturesmentioning

confidence: 71%

Compound valence is conserved in binary odor mixtures in Drosophila melanogaster

Thoma

Hansson

Knaden

2014

Journal of Experimental Biology

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Most naturally occurring olfactory signals do not consist of monomolecular odorants but, rather, are mixtures whose composition and concentration ratios vary. While there is ample evidence for the relevance of complex odor blends in ecological interactions and for interactions of chemicals in both peripheral and central neuronal processing, a fine-scale analysis of rules governing the innate behavioral responses of Drosophila melanogaster towards odor mixtures is lacking. In this study we examine whether the innate valence of odors is conserved in binary odor mixtures. We show that binary mixtures of attractants are more attractive than individual mixture constituents. In contrast, mixing attractants with repellents elicits responses that are lower than the responses towards the corresponding attractants. This decrease in attraction is repellentspecific, independent of the identity of the attractant and more stereotyped across individuals than responses towards the repellent alone. Mixtures of repellents are either less attractive than the individual mixture constituents or these mixtures represent an intermediate. Within the limits of our data set, most mixture responses are quantitatively predictable on the basis of constituent responses. In summary, the valence of binary odor mixtures is predictable on the basis of valences of mixture constituents. Our findings will further our understanding of innate behavior towards ecologically relevant odor blends and will serve as a powerful tool for deciphering the olfactory valence code.

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Section: The Valence Of Odor Mixturesmentioning

confidence: 71%

Compound valence is conserved in binary odor mixtures in Drosophila melanogaster

Thoma

Hansson

Knaden

2014

Journal of Experimental Biology

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“…However, the contact effect of this compound appeared only after 48 hrs from treatment, when it is not possible to exclude an 'induction' effect at all. In a different system (Vicia faba and the black bean aphid, Aphis fabae), cis-hexen-1-ol proved to be attractive towards the aphids (Webster et al 2010) and this is surprising, considering that A. fabae and M. euphorbiae share many host plants, even though they show a respective preference for Leguminosae and Solanaceae (Blackman & Eastop 2000). The effect of cis-hexen-1-ol on aphid reproduction seems to be variable.…”

Section: Discussionmentioning

confidence: 99%

Interactions between tomato volatile organic compounds and aphid behaviour

Digilio

Cascone²,

Iodice³

et al. 2012

Journal of Plant Interactions

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In the tritrophic system consisting of tomato, Solanum lycopersicum (L.), the aphid Macrosiphum euphorbiae (Thomas) and its natural enemy, the parasitoid Aphidius ervi (Haliday), it has been shown that the release of volatile organic compounds following aphid attack is responsible for attracting aphid parasitoids in wind tunnel experiments. The main compounds involved in these multitrophic interactions have been characterized and quantified. In this work, the possible activity of such compounds on plant direct defences against the aphid M. euphorbiae was assessed in laboratory tests. The selected compounds were applied to uninfested tomato plants, either by evaporation or contact, and performance of aphids, in terms of plant acceptance, fixing behaviour and aphid development, calculated in standard conditions. The results showed that two compounds, namely methyl salicylate and cis-hex-3-en-1-ol, alter aphid performance. These two compounds have been reported to be those eliciting the best response by A. ervi in terms of flight behavior (wind tunnel bioassay) and antennal stimulation (EAG bioassay).

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“…The ability of insects to locate host plants for feeding or reproduction (eggs laying) is affected by the VOCs that it perceives (Bruce et al 2005;Webster et al 2010;Solé et al 2010;Bruce and Pickett 2011). In addition to directly repelling insects, non-host odours also mask host plant volatiles .…”

Section: Discussionmentioning

confidence: 99%

Oviposition deterrent activity of basil plants and their essentials oils against Tuta absoluta (Lepidoptera: Gelechiidae)

Yarou

Bawin

Boullis

et al. 2017

Environ Sci Pollut Res

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The leafminer Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) is one of the most important pests of tomato, reducing crop yields by up to 100% in greenhouses and fields, in several countries globally. Because synthetic insecticides lead to resistance and have adverse effects on natural enemies and the health of producers, alternative control methods are needed. In this study, we assessed the oviposition-deterring effect of basil plants, Ocimum gratissimum L. and O. basilicum L. (Lamiaceae), using dual-choice behavioural assays performed in flight tunnels. We found that both plants significantly reduced T. absoluta oviposition behaviour on a tomato plant located nearby. To evaluate the potential effect of basil volatile organic compounds, we formulated essential oils of both plant species in paraffin oil, and observed a similar oviposition-deterring effect. Gas chromatography analyses detected 18 constituents in these essential oils which the major constituents included thymol (33.3%), p-cymene (20.4%), γ-terpinene (16.9%), myrcene (3.9%) in O. gratissimum and estragol (73.8%), linalool (8.6%), β-elemene (2.9%) and E-β-ocimene (2.6%) in O. basilicum. Twenty and 33 compounds were identified of the volatiles collected on O. gratissimum and O. basilicum plants, respectively. The main components include the following: p-cymene (33.5%), γ-terpinene (23.6%), α-terpinene (7.2%), α-thujene (6.7%) and E-α-bergamotene (38.9%) in O. gratissimum, and methyl eugenol (26.1%), E-β-ocimene (17.7%), and linalool (9.4%) in O. basilicum. Four compounds (α-pinene, β-pinene, Myrcene, Limonene) were common in essential oils and plants. Our results suggest the valuable potential of basil and associated essential oils as a component of integrated management strategies against the tomato leafminer.

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Volatiles functioning as host cues in a blend become nonhost cues when presented alone to the black bean aphid

Cited by 220 publications

References 32 publications

Compound valence is conserved in binary odor mixtures in Drosophila melanogaster

Compound valence is conserved in binary odor mixtures in Drosophila melanogaster

Interactions between tomato volatile organic compounds and aphid behaviour

Oviposition deterrent activity of basil plants and their essentials oils against Tuta absoluta (Lepidoptera: Gelechiidae)

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