Responses of Thrips tabaci to odours of herbivore-induced cotton seedlings

Silva, Rehan, Walter, Gimme H., Wilson, Lewis J. and Furlong, Michael J. (2014) Responses of Thrips tabaci to odours of herbivore-induced cotton seedlings. Entomologia Experimentalis et Applicata, 151 3: 239-246. doi:10.1111/eea.12188

Author Silva, Rehan
Walter, Gimme H.
Wilson, Lewis J.
Furlong, Michael J.
Title Responses of Thrips tabaci to odours of herbivore-induced cotton seedlings
Formatted title
Responses of Thrips tabaci to odours of herbivore-induced cotton seedlings
Journal name Entomologia Experimentalis et Applicata   Check publisher's open access policy
ISSN 1570-7458
Publication date 2014-06-01
Year available 2014
Sub-type Article (original research)
DOI 10.1111/eea.12188
Open Access Status
Volume 151
Issue 3
Start page 239
End page 246
Total pages 8
Place of publication Chichester, West Sussex United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
Herbivore-induced changes in plants have been widely viewed as defensive responses against further insect attack. However, changes in plants as a consequence of herbivore feeding can elicit various responses in herbivores; these are variable, context dependent, and often unpredictable. In this laboratory study, the responses of Thrips tabaci Lindeman (Thysanoptera: Thripidae) to volatiles emitted by intact and herbivore-damaged or mechanically damaged cotton seedlings [Gossypium hirsutum L. (Malvaceae)] were investigated in dual-choice olfactometer assays. Thrips tabaci showed increased attraction to seedlings subject to foliar mechanical damage and those with foliar damage inflicted by conspecifics or Tetranychus urticae Koch (Acari: Tetranychidae), upon which it preys. However, T. tabaci did not discriminate between intact seedlings and those with foliar damage inflicted by Helicoverpa armigera Hübner (Lepidoptera: Noctuidae), two other species of thrips, Frankliniella schultzei Trybom and Frankliniella occidentalis Pergrande (Thysanoptera: Thripidae), or those with root damage inflicted by Tenebrio molitor L. (Coleoptera: Tenebrionidae). Attraction of T. tabaci was also affected by herbivore density on damaged plants. That is, seedlings damaged by higher densities of T. urticae or T. tabaci were more attractive than seedlings damaged by lower densities of the corresponding arthropod. Although attracted to plants damaged by conspecifics or T. urticae, T. tabaci showed greater attraction to seedlings damaged by T. urticae than to seedlings damaged by conspecifics. Results are discussed in the context of the responses of F. schultzei and F. occidentalis to herbivore-induced cotton seedlings, highlighting the complexity, variability, and unpredictability of the responses of even closely related species of insects to plants under herbivore attack.
Keyword Thysanoptera
Induced resistance
Induced susceptibility
Plant volatile
Volatile signal
Host finding
Gossypium hirsutum
Tetranychus urticae
Helicoverpa armigera
Tenebrio molitor
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Biological Sciences Publications
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