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Activity of male pheromone of Melanesian Rhinoceros Beetle Scapanes australis

Activity of male pheromone of Melanesian Rhinoceros Beetle Scapanes australis

Rochat, Didier, Morin, Jean-Paul, Kakul, Titus, Beaudoin-Ollivier, Laurence, Prior, Robert, Renou, Michel, Malosse, Isabelle, Stathers, Tanya ORCID: 0000-0002-7767-6186, Empuba, Sebastian and Laup, Samson (2002) Activity of male pheromone of Melanesian Rhinoceros Beetle Scapanes australis. Journal of Chemical Ecology, 28 (3). pp. 479-500. ISSN 0098-0331 (Print), 1573-1561 (Online) (doi:

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Laboratory and field investigations were carried out to investigate the nature and role of the male pheromone emitted by the Dynast beetle Scapanes australis and to develop a mass trapping technique against this major coconut
pest in Papua New Guinea. We report the biological data obtained from natural and synthetic pheromone, previously described as an 84:12:4 (w/w) mixture of 2-butanol (1), 3-hydoxy-2-butanone (2), and 2,3-butanediol (3). EAG recordings from natural and synthetic pheromone and a pitfall olfactometer were poorly informative. In contrast, extensive field trapping trials with various synthetic pheromone mixtures and doses showed that 1 and 2 (formulated in polyethylene sachets in 90:5 v/v ratio) were necessary and sufficient for optimum long-range attraction. Beetles were captured in traps baited with racemic 1 plus 2, with or without a stereoisomer mixture of 3 (2.5- to 2500-mg/day doses). Plant pieces, either sugarcane or coconut, enhanced captures by the synthetic pheromone,
which was active alone. Traps with the pheromone caught both sexes in a 3:2 female–male ratio. A pheromone-based mass trapping led to the capture of 2173 beetles in 14 traps surrounding 40 ha of a cocoa-coconut plantation.
The captures followed a log-linear decrease during the 125-week trapping program. The role of the male pheromone and its potential for crop protection are discussed.

Item Type: Article
Uncontrolled Keywords: Coleoptera, Scarabaeidae, Scapanes, aggregation pheromone, EAG, field trapping, coconut pest
Subjects: S Agriculture > S Agriculture (General)
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science
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Last Modified: 14 Jul 2015 16:30

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