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Digitale Medien

Visual feedback in the control of pheromone-mediated flight ofHeliothis virescens males (Lepidoptera: Noctuidae) (1994)

Vickers, Neil J. ; Baker, Thomas C.

Springer

Journal of insect behavior 7 (1994), S. 605-632

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ISSN: 1572-8889

Schlagwort(e): Heliothis ; Lepidoptera ; Noctuidae ; pheromone ; visual feedback

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract MaleHeliothis virescens (F.) (Lepidoptera: Noctuidae) were made to fly into a uniformly white and translucent tube within a large wind tunnel while responding to sex pheromone. Different visual patterns placed within the tube greatly affected the ability of the male moths to maintain upwind progress or remain oriented to the wind while in contact with the plume. Over 89% of males attempting to fly through a blank tube, lacking visual patterns, became disoriented, the males gaining or losing altitude and repeatedly hitting the sides of the tube. Patterns of 20–40 dots placed on the sides of the tube at or slightly above plume level resulted in high levels of sustained upwind flight (47–74%) relative to patterns placed directly below (30–40%), directly above (35%), or slightly below the level of the flight path (26–44%). Optimal upwind progression in pheromone-responding males occurred when image motion could be resolved both transversely (T), orthogonally to the longitudinal axis of the body relative to the horizontal plane of the environment, and longitudinally (L), along the body axis. Even very sparse patterns (single rows of dots) could elicit high levels of sustained upwind flight (53–63%) when positioned within the tube such that the males' movements would create both L and T image motion. However, successful negotiation of the tube was also unexpectedly facilitated by patterns apparently providing no horizontal transverse component for flying males but providing longitudinal flow while centering the moth in the plume through a symmetrical left-right input (4–40%).

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01997435

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Digitale Medien

Identification and bioassay of sex pheromone components of carob moth,Ectomyelois ceratoniae (Zeller) (1991)

Baker, T. C. ; Francke, W. ; Millar, J. G. ; [weitere]

Springer

Journal of chemical ecology 17 (1991), S. 1973-1988

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ISSN: 1573-1561

Schlagwort(e): Flight tunnel ; gas chromatography-electrophysiology ; mass ; spectrometry ; aldehydes ; (Z,E)-9,11,13-tetradecatrienal ; (Z,E)-9,11-tetra-decadienal ; (Z)-9-tetradecenal ; pheromone ; Lepidoptera ; Pyralidae

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Chemie und Pharmazie

Notizen: Abstract Three sex pheromone components of the carob moth were isolated and identified from the extract of female pheromone glands, using a variety of techniques including coupled gas chromatographic-electroantennographic recordings, coupled gas chromatographic-mass spectrometric analysis, microozonolysis, electroantennographic assays of monounsaturated standards, wind-tunnel bioassays, and field trials. The major component was identified as (Z,E)-9,11,13-tetradecatrienal, a novel lepidopterous pheromone component structure. Two minor components, either one of which improves the upwind flight response of males when blended with the major component, were identified as (Z,E)-9,11-tetradecadienal, and (Z)-9-tetra-decenal.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00992582

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Digitale Medien

An equilibrium and stability study of Δ1-pyrroline (1992)

Baker, John D. ; Heath, Robert R. ; Millar, Jocelyn G.

Springer

Journal of chemical ecology 18 (1992), S. 1595-1602

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ISSN: 1573-1561

Schlagwort(e): 3,4-Dihydro-2H-pyrrole ; pheromone ; Δ1-pyrroline ; [1H]NMR spectroscopy ; [13C]NMR spectroscopy ; equilibrium ; Mediterranean fruit fly ; Ceratitis capitata ; Diptera ; Tephritidae

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Chemie und Pharmazie

Notizen: Abstract Several properties of the compound 3,4-dihydro-2H-pyrrole(A1-pyrroline), which has been reported as a component of the male-produced Mediterranean fruit fly pheromone, have been determined by [1H]- and [13C]nuclear magnetic resonance spectroscopy. The stability of Δ1-pyrroline in several solvents and at moderately elevated temperatures has been investigated, and it has been established that it exists as both a monomer and trimer in solution. Although equilibrium studies indicate that the trimer is thermodynamically more stable than the monomer in solution, only the monomer was found in the vapor phase based on infrared analysis.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00993232

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