Blackheaded fireworm: Laboratory and field studies of its sex pheromone |
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Authors: | L M McDonough H G Davis S Voerman |
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Affiliation: | (1) Agricultural Research Service, USDA, Yakima Agricultural Research Laboratory, 98902 Yakima, Washington;(2) Institute for Pesticide Research, Marijkeweg 22, 6709 PG Wageningen, The Netherlands |
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Abstract: | Electroantennogram (EAG) responses of maleRhopobota naevana (Hübner), the blackheaded fireworm, to all of the monoene straightchain 12- and 14-carbon alcohols and acetates implicated (Z)-11-tetradecenl-1-ol (Z11–14 OH) and its acetate (Z11–14 Ac) as sex pheromone components.Z11–14 Ac produced the strongest EAG response of all compounds tested. Gas chromatography-mass spectrometry (GC-MS) analysis of extract of female sex pheromone glands (SPG) confirmed the presence ofZ11–14 OH (125 pg/female) andZ11–14 Ac (600 pg/female) (all other monoenes had different retention times). In field tests, traps baited withZ11–14 OH alone captured males, but traps baited withZ11–14 Ac alone did not. Traps baited with a combination ofZ11–14 OH andZ11–14 Ac in various ratios did not produce better trap catches thanZ11–14 OH alone. (Z)-9-Dodecen-1-ol acetate (Z9–12 Ac), reported by others to be a field attractant, did not produce trap catch in our tests, but in combination withZ11–14 OH (98 2 in septa corresponding to 95:5 in vapor,Z11–14 OH toZ9–12 AC) produced a sevenfold increase in catch overZ11–14 OH alone. IfZ9–12 AC had been present in extract of SPG at 2–5% ofZ11–14 OH, it would not have been detected in our GC-MS experiment.
Rhopobota naevana (Hübner) Lepidoptera: Tortricidae: Olethreutinae. |
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Keywords: | Rhopobota naevana (Hü bner) Rhopobota unipunctana Haworth Rhopobota naevana naevana (Hü bner) blackheaded fireworm Lepidoptera Tortricidae Olethreutinae sex pheromone sex attractant (Z)-11-tetradecen-1-ol (Z)-11-tetradecen-1-ol acetate (Z)-9-dodecen-1-ol acetate |
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