Identification of the Aggregation Pheromone of the Date Palm Root Borer Oryctes agamemnon
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 feedin...
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Published in | Journal of chemical ecology Vol. 41; no. 5; pp. 446 - 457 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.05.2015
Springer Nature B.V Springer Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0098-0331 1573-1561 |
DOI: | 10.1007/s10886-015-0577-7 |