Ethyl propionate: synergistic kairomone for African palm weevil, Rhynchophorus phoenicis L. (Coleoptera: Curculionidae)

Small trunk pieces of a freshly felled 10-year-old oil palm,Elaeis quineensis (Jacq.), were placed in a modified Nalgene desiccator, and volatiles captured for six days on Porapak Q. Gas chromatographic (GC) analysis of Porapak-Q-trapped volatiles with both flame ionization (FID) and electroantennog...

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Bibliographic Details
Published in:Journal of chemical ecology 1994-04, Vol.20 (4), p.889-897
Main Authors: Gries, G, Gries, R, Perez, A.L, Gonzales, L.M, Pierce, H.D. Jr, Oehlschlager, A.C, Rhainds, M, Zebeyou, M, Kouame, B
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
BEHAVIOUR
Biological and medical sciences
CAIROMONAS
CHEMICAL COMPOSITION
COMPORTAMIENTO
COMPORTEMENT
COMPOSE VOLATIL
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
COMPUESTO VOLATIL
COTE D'IVOIRE
ELAEIS GUINEENSIS
Fundamental and applied biological sciences. Psychology
HOST-SEEKING BEHAVIOR
Invertebrates
KAIROMONES
OIL PALMS
PALMAS OLEAGINOSAS
PALMIER OLEIFERE
Protozoa. Invertebrata
RHYNCHOPHORUS
SINERGISMO
SYNERGIE
SYNERGISM
VOLATILE COMPOUNDS
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Summary:Small trunk pieces of a freshly felled 10-year-old oil palm,Elaeis quineensis (Jacq.), were placed in a modified Nalgene desiccator, and volatiles captured for six days on Porapak Q. Gas chromatographic (GC) analysis of Porapak-Q-trapped volatiles with both flame ionization (FID) and electroantennographic detection (EAD) using male or femaleR. phoenicis antennae revealed several EAD-active compounds. They were identified as: ethyl acetate, ethyl propionate, isobutyl propionate, ethyl butyrate, and ethyl isobutyrate. In field experiments in the La Me Research Station, Côte d'Ivoire, ethyl propionate (50 mg/24 hr) but not all esters combined (50 mg/24 hr each) significantly increased capture ofR. phoenicis in pheromone-baited (3 mg/24 hr) traps. One kilogram of 1- to 3-day-old palm tissue was significantly more effective than ethyl propionate in enhancing pheromone attraction. Superior attraction of palm tissue may be attributed to additional as yet unknown semiochemicals. Alternatively, release rates and/or ratios of synthetic volatiles differed from those of palm tissue at peak attraction.
ISSN:0098-0331
1573-1561
DOI:10.1007/bf02059585