Aggregation Pheromone of Coconut Rhinoceros Beetle, Oryctes rhinoceros (L.) (Coleoptera: Scarabaeidae)
Fecha
1995-10
Tipo
artículo original
Autores
Hallett, Rebecca H.
Pérez Sánchez, Alice Lorena
Gries, Gerhard
Gries, Regine
Pierce Jr., Harold D.
Yue, Junming
Oehlschlager, Allan Cameron
González, Lilliana M.
Borden, John H.
Título de la revista
ISSN de la revista
Título del volumen
Editor
Resumen
Male coconut rhinoceros beetles,Oryctes rhinoceros (L.), produce three sex-specific compounds, ethyl 4-methyloctanoate, ethyl 4-methylheptanoate, and 4-methyloctanoic acid, the first of which is an aggregation pheromone. Synthesis of these compounds involving conjugate addition of organocuprates to ethyl acrylate is reported. In field trapping experiments, (4S)-ethyl 4-methyloctanoate and the racemic mixture were equally attractive and 10 times more effective in attracting beetles than ethyl chrysanthemumate, a previously recommended attractant. Ethyl 4-methylheptanoate was as attractive as ethyl chrysanthemumate and more attractive than 4-methyloctanoic acid, but further studies are required before it can be classed as an aggregation pheromone. Compared to ethyl 4-methyloctanoate alone, combinations of the three male-produced compounds did not increase attraction, whereas addition of freshly rotting oil palm fruit bunches to pheromone-baited traps significantly enhanced attraction. With increasing dose, captures of O. rhinoceros increased, but doses of 6, 9, and 18 mg/day were competitive with 30 mg/day lures. Newly designed vane traps were more effective in capturing beetles than were barrier or pitfall traps. Results of this study indicate that there is potential for using ethyl 4-methyloctanoate in operational programs to control O. rhinoceros in oil palm plantations.
Descripción
Palabras clave
Coleoptera, Scarabaeidae, Oryctes rhinoceros, coconut rhinoceros beetle, Aggregation pheromones, Pheromone chirality, ethyl 4-methyloctanoate, ethyl 4-methylheptanoate, 4-methyloctanoic acid