| 1. |
- Baker, Thomas C., et al.
(författare)
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Adaptation of antennal neurons in moths is associated with cessation of pheromone-mediated upwind flight
- 1988
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Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424. ; 85:24, s. 9826-9830
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Tidskriftsartikel (refereegranskat)abstract
- A wind-borne plume of sex pheromone from a female moth or a synthetic source has a fine, filamentous structure that creates steep and rapid fluctuations in concentration from a male moth flying up the plume's axis. The firing rates from single antennal neurons on Agrotis segetum antennae decreased to nearly zero within seconds after the antennae were placed in a pheromone plume 70 cm downwind of a high-concentration source known from previous studies to cause in-flight arrestment of upwind progress. In a separate experiment, the fluctuating output from chilled neurons on Grapholita molesta antennae became attenuated in response to repetitive, experimentally delivered pheromone pulses. The attenuation was correlated with a previously reported higher percentage of in-flight arrestment exhibited by moths flying at cooler compared to warmer temperatures. These results indicate that two peripheral processes related to excessive concentration, complete adaptation of antennal neurons, or merely the attenuation of fluctuations in burst frequency, are important determinants of when upwind progress by a moth flying in a pheromone plume stops and changes to station keeping. Also, adaptation and attenuation may affect the sensation of blend quality by preferentially affecting cells sensitive to the most abundant components in airborne pheromone blends.
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| 2. |
- Baker, Thomas C., et al.
(författare)
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Adaptation of male moth antennal neurons in a pheromone plume is associated with cessation of pheromone-mediated flight
- 1989
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Ingår i: Chemical Senses. - : Oxford University Press (OUP). - 0379-864X .- 1464-3553. ; 14:3, s. 439-448
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Tidskriftsartikel (refereegranskat)abstract
- Recordings of the firing rates of single antennal neurons when Agrotis segetum antennac were placed 70 cm downwind of a pheromone source revealed that cells sensitive to the most volatile component adapted rapidly in a plume from a high-concentration source known from previous studies to cause in-flight arrestment of progress towards the source. No adaptation was found in response to lower-concentration plumes known to promote high levels of sustained flight to the source with little premature arrestment. Adaptation was not observed in antennal neurons of a second species, Heliothis virescens, when they were placed in plumes of this species' sex pheromone blend, regardless of the concentration. In flight-tunnel tests these same pheromone sources evoked high levels of source location with little arrestment. These results indicate that adaptation or attenuation of antennal neuronal burst frequencies in response to rapidly arriving pheromone filaments in a plume may be important peripheral determinants of whether or not prolonged upwind flight and successful pheromone source location occurs.
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| 3. |
- Baker, T. C., et al.
(författare)
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Isolation, identification and synthesis of sex pheromone components of the carob moth, Ectomyelois ceratoniae
- 1989
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Ingår i: Tetrahedron Letters. - 0040-4039. ; 30:22, s. 2901-2902
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Tidskriftsartikel (refereegranskat)abstract
- The sex pheromone of females of the carob moth, Ectomyelois ceratoniae, was identified to be a mixture of (Z,E)-9,11,13-tetradecatrienal, (Z,E)-9,11-tetradecadienal and (Z)-9-tetradecenal in the ratio of 10:1:1. A synthetic blend proved to be attractive. GC/EAD + GC/MS investigations showed (Z,E)-9,11,13-tetradecatrienal, (Z,E)-9,11-tetradecadienal and (Z)-9-tetradecenal to be the sex pheromone of the carob moth. Blends of synthetic compounds are active.
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| 4. |
- Löfstedt, Christer, et al.
(författare)
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Diet related courtship success in the oriental fruit moth, Grapholita molesta (Tortricidae)
- 1989
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Ingår i: Oikos. - : JSTOR. - 0030-1299. ; 55:3, s. 402-408
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Tidskriftsartikel (refereegranskat)abstract
- Males reared on artificial diet as larvae or starved as adults contained lower amounts of the behaviourally most active courtship pheromone component ethyl trans-cinnamate, but no difference in mating success between apple-reared and diet-reared males could be demonstrated. -from Authors
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