Abstract
Electroantennogram (EAG) evaluation of selected compounds from wilted leaves of black poplar, Populus nigra, showed that phenyl acetaldehyde, methyl salicylate, (E)-2-hexenal elicited strong responses from male antennae of Helicoverpa armigera. When mixed with sex pheromone (Ph), some volatiles, e.g. phenyl acetaldehyde, benzyl alcohol, phenylethanol, methylsalicylate, linalool, benzaldehyde, (Z)-3-hexenol, (Z)-3-hexenylacetate, (Z)-6-nonenol, cineole, (E)-2-hexenal, and geraniol elicited stronger responses from male antennae than Ph alone. Wind tunnel bioassay demonstrated that various volatiles could either enhance or inhibit the effect of synthetic sex pheromone. (E)-2-hexenal, (Z)-3-hexenol and linalool in combination with Ph could not induce any male to land on source at all, whereas phenyl acetaldehyde, benzaldehyde, (Z)-6-nonenol and salicylaldehyde combined with Ph enhanced male response rates by 58.63%, 50.33%, 51.85% and 127.78%, respectively, compared to Ph alone. These results suggested that some volatiles should modify sex pheromone caused behavior and that some of them couldpossibly be used as a tool for disrupting mating or for enhancing the effect of synthetic sex pheromone in the field.
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Project supported by Knowledge Innovation Program from Chinese Academy of Sciences (CAS) (No. KSCX2-02-5-2) and Shanghai Commission of Science and Technology (Nos. 023912004 and 01JC14051), China
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Deng, Jy., Huang, Yp., Wei, Hy. et al. EAG and behavioral responses of Helicoverpa armigera males to volatiles from poplar leaves and their combinations with sex pheromone. J. Zheijang Univ.-Sci. 5, 1577–1582 (2004). https://doi.org/10.1631/jzus.2004.1577
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DOI: https://doi.org/10.1631/jzus.2004.1577