Responses of male Helicoverpa zea to single pulses of sex pheromone and behavioural antagonist
Male Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) flying in a pheromone plume respond to the loss of pheromone when they fly into a large pocket of clean air by going into crosswind casting flight in a mean of 0.48 s; 0.62 s after re-contacting pheromone presented as a single pulse, they surge...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2001 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/412781 |
| Acceso en línea: | http://hdl.handle.net/10261/412781 https://api.elsevier.com/content/abstract/scopus_id/0034948827 |
| Access Level: | acceso abierto |
| Palabra clave: | Wind tunnel Helicoverpa zea Sex pheromone http://metadata.un.org/sdg/15 http://metadata.un.org/sdg/9 http://metadata.un.org/sdg/12 Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation Ensure sustainable consumption and production patterns Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss |
| Sumario: | Male Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) flying in a pheromone plume respond to the loss of pheromone when they fly into a large pocket of clean air by going into crosswind casting flight in a mean of 0.48 s; 0.62 s after re-contacting pheromone presented as a single pulse, they surge upwind in a kind of narrow zigzagging flight. After 0.36s of surging, they lapse into casting flight once again in the clean air following the pulse. The addition of a known behavioural antagonist (Z)-11-hexadecenyl acetate (Z11-16:Ac), to the pheromone significantly increases the mean latency of the response to a single pulse to 0.85 s. No other aspects of the surge were significantly changed by the presence of antagonist in the single pulse of pheromone. Thus, unlike males of the related species, Heliothis virescens, which show significant changes in track and course angles when antagonist is present in single pulses, only an increased latency of response to a filament containing antagonist occurred in H. zea males. The increased latency could act cumulatively when the male is exposed rapidly and repeatedly to filaments in a natural plume and explain the profound arrestment effect of the antagonist in such plumes. The latencies to casting and surging in response to a pulse of pheromone blend are longer than those of the smaller species, H. virescens, and may be due to size-related differences in manoeuverability of H. zea vs. H. virescens. |
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