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Attraction modulated by spacing of pheromone components and anti-attractants in a bark beetle and a moth

Andersson, Martin N LU ; Binyameen, Muhammad; Sadek, Medhat M and Schlyter, Fredrik (2011) In Journal of Chemical Ecology 37. p.899-911
Abstract
Orientation for insects in olfactory landscapes

with high semiochemical diversity may be a challenging

task. The partitioning of odor plumes into filaments that are

interspersed with pockets of ‘clean air’ may help filament

discrimination and upwind flight to attractive sources in the

face of inhibitory signals. We studied the effect of distance

between odor sources on trap catches of the beetle, Ips

typographus, and the moth, Spodoptera littoralis. Insects

were tested both to spatially separated pheromone components

[cis-verbenol and 2-methyl-3-buten-2-ol for Ips; (Z,E)-

9,11-tetradecadienyl acetate and (Z,E)-9,12-tetradecadienyl

acetate for... (More)
Orientation for insects in olfactory landscapes

with high semiochemical diversity may be a challenging

task. The partitioning of odor plumes into filaments that are

interspersed with pockets of ‘clean air’ may help filament

discrimination and upwind flight to attractive sources in the

face of inhibitory signals. We studied the effect of distance

between odor sources on trap catches of the beetle, Ips

typographus, and the moth, Spodoptera littoralis. Insects

were tested both to spatially separated pheromone components

[cis-verbenol and 2-methyl-3-buten-2-ol for Ips; (Z,E)-

9,11-tetradecadienyl acetate and (Z,E)-9,12-tetradecadienyl

acetate for Spodoptera], and to separated pheromone and

anti-attractant sources [non-host volatile (NHV) blend for

Ips; (Z)-9-tetradecenyl acetate for Spodoptera]. Trap catch

data were complemented with simulations of plume structure

and plume overlap from two separated sources using a photo

ionization detector and soap bubble generators. Trap catches

of the beetle and the moth were both affected when odor

sources in the respective traps were increasingly separated.

However, this effect on trap catch occurred at smaller

(roughly by an order of magnitude) odor source separation

distances for the moth than for the beetle. This may reflect

differences between the respective olfactory systems and

central processing. For both species, the changes in trap

catches in response to separation of pheromone components

occurred at similar spacing distances as for separation of

pheromone and anti-attractant sources. Overlap between two

simulated plumes depended on distance between the two

sources. In addition, the number of detected filaments and

their concentration decreased with downwind distance. This

implies that the response to separated odor sources in the

two species might take place under different olfactory

conditions. Deploying multiple sources of anti-attractant

around a pheromone trap indicated long-distance (meter

scale) effects of NHVon the beetle and a potential use for

NHV in forest protection. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Odor-source spacing, Semiochemical diversity hypothesis, Plume structure, Antagonist . Anti-attractant . Non-host volatiles . Field trapping . Photo ionization detector. Coleoptera . Curculionidae . Scolytinae . Scolytidae . Lepidoptera . Noctuidae
in
Journal of Chemical Ecology
volume
37
pages
899 - 911
publisher
Springer
external identifiers
  • WOS:000293412700011
  • Scopus:79960982488
ISSN
1573-1561
DOI
10.1007/s10886-011-9995-3
language
English
LU publication?
yes
id
9b0d8f7e-4617-49ed-9879-eed14ef715fc (old id 2028291)
date added to LUP
2011-07-20 11:42:59
date last changed
2016-10-13 04:46:38
@misc{9b0d8f7e-4617-49ed-9879-eed14ef715fc,
  abstract     = {Orientation for insects in olfactory landscapes<br/><br>
with high semiochemical diversity may be a challenging<br/><br>
task. The partitioning of odor plumes into filaments that are<br/><br>
interspersed with pockets of ‘clean air’ may help filament<br/><br>
discrimination and upwind flight to attractive sources in the<br/><br>
face of inhibitory signals. We studied the effect of distance<br/><br>
between odor sources on trap catches of the beetle, Ips<br/><br>
typographus, and the moth, Spodoptera littoralis. Insects<br/><br>
were tested both to spatially separated pheromone components<br/><br>
[cis-verbenol and 2-methyl-3-buten-2-ol for Ips; (Z,E)-<br/><br>
9,11-tetradecadienyl acetate and (Z,E)-9,12-tetradecadienyl<br/><br>
acetate for Spodoptera], and to separated pheromone and<br/><br>
anti-attractant sources [non-host volatile (NHV) blend for<br/><br>
Ips; (Z)-9-tetradecenyl acetate for Spodoptera]. Trap catch<br/><br>
data were complemented with simulations of plume structure<br/><br>
and plume overlap from two separated sources using a photo<br/><br>
ionization detector and soap bubble generators. Trap catches<br/><br>
of the beetle and the moth were both affected when odor<br/><br>
sources in the respective traps were increasingly separated.<br/><br>
However, this effect on trap catch occurred at smaller<br/><br>
(roughly by an order of magnitude) odor source separation<br/><br>
distances for the moth than for the beetle. This may reflect<br/><br>
differences between the respective olfactory systems and<br/><br>
central processing. For both species, the changes in trap<br/><br>
catches in response to separation of pheromone components<br/><br>
occurred at similar spacing distances as for separation of<br/><br>
pheromone and anti-attractant sources. Overlap between two<br/><br>
simulated plumes depended on distance between the two<br/><br>
sources. In addition, the number of detected filaments and<br/><br>
their concentration decreased with downwind distance. This<br/><br>
implies that the response to separated odor sources in the<br/><br>
two species might take place under different olfactory<br/><br>
conditions. Deploying multiple sources of anti-attractant<br/><br>
around a pheromone trap indicated long-distance (meter<br/><br>
scale) effects of NHVon the beetle and a potential use for<br/><br>
NHV in forest protection.},
  author       = {Andersson, Martin N and Binyameen, Muhammad and Sadek, Medhat M and Schlyter, Fredrik},
  issn         = {1573-1561},
  keyword      = {Odor-source spacing,Semiochemical diversity hypothesis,Plume structure,Antagonist . Anti-attractant .
Non-host volatiles . Field trapping . Photo ionization
detector. Coleoptera . Curculionidae . Scolytinae .
Scolytidae . Lepidoptera . Noctuidae},
  language     = {eng},
  pages        = {899--911},
  publisher    = {ARRAY(0x99d6260)},
  series       = {Journal of Chemical Ecology},
  title        = {Attraction modulated by spacing of pheromone components and anti-attractants in a bark beetle and a moth},
  url          = {http://dx.doi.org/10.1007/s10886-011-9995-3},
  volume       = {37},
  year         = {2011},
}