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J Chem Ecol

Title:		Identification of the Aggregation Pheromone of the Date Palm Root Borer Oryctes agamemnon
Author(s):		Said I; Hasni N; Abdallah Z; Couzi P; Ouhichi M; Renou M; Rochat D;
Address:		"Faculte des Sciences de Gafsa, Universite de Gafsa, Campus Zarroug, 2112, Gafsa, Tunisia, imensaid@gmx.fr"
Journal Title:		J Chem Ecol
Year:		2015
Volume:		20150422
Issue:		5
Page Number:		446 - 457
DOI:		10.1007/s10886-015-0577-7
ISSN/ISBN:		1573-1561 (Electronic) 0098-0331 (Linking)
Abstract:		"Laboratory and field investigations aimed to characterize the chemical communication system of the date palm pest Oryctes agamemnon. Live males or extracts of male effluvia attracted conspecifics in an olfactometer, whereas female effluvia attracted only males. Volatile emissions from adults feeding on sugarcane were sampled and analysed by gas chromatography (GC) and GC/mass spectrometry (GC/MS). Males emitted a blend of 1) ethyl 4-methyloctanoate, 2) 4-methyloctanoic acid, 3) 4-methyloctanyl acetate, and 4) 4-methyloctanol in variable ratio. Single sensillum recordings demonstrated that compounds 1, 2, and 3 are detected by specific olfactory receptor neurons. Olfactometric experiments showed that compounds 1 and 3 attract both sexes of O. agamemnon, but females are more attracted by compound 1 and males by compound 3. Compound 2 was more attractive for females, especially virgin ones. Field experiments confirmed that compound 1 and compound 2 attracted O. agamemnon of both sexes and showed synergy with palm odors. No clear activity of compound 3 was observed. A mix of compounds 1 and 2 with date palm core odor was significantly the most attractive, and captured more females than males. The male aggregation pheromone of O. agamemnon appears therefore to be based on a mixture in contrast to previously identified Oryctes pheromones. Our results provide the basis for developing mass trapping to control this pest"
Keywords:		Animal Communication Animal Distribution/*physiology Animals Arthropod Antennae/physiology Caprylates/analysis Coleoptera/chemistry/*physiology Female Male Octanols/analysis *Olfactometry Pheromones/analysis/*physiology Phoeniceae/chemistry Sensilla/*phys;
Notes:		"MedlineSaid, Imen Hasni, Narjes Abdallah, Zeineb Couzi, Philippe Ouhichi, Moneem Renou, Michel Rochat, Didier eng Research Support, Non-U.S. Gov't 2015/04/23 J Chem Ecol. 2015 May; 41(5):446-57. doi: 10.1007/s10886-015-0577-7. Epub 2015 Apr 22"