AGGREGATION PHEROMONE OF COCONUT RHINOCEROS BEETLE, ORYCTES-RHINOCEROS (L) (COLEOPTERA, SCARABAEIDAE)

作者：HALLETT RH^*; PEREZ AL; GRIES G; GRIES R; PIERCE HD; YUE J; OEHLSCHLAGER AC; GONZALEZ LM; BORDEN JH

来源：Journal of Chemical Ecology, 1995, 21(10): 1549-1570.

DOI：10.1007/BF02035152

• COLEOPTERA, SCARABAEIDAE
• ORYCTES RHINOCEROS
• COCONUT RHINOCEROS BEETLE
• AGGREGATION PHEROMONE
• PHEROMONE CHIRALITY
• ETHYL 4-METHYLOCTANOATE
• ETHYL 4-METHYLHEPTANOATE
• 4-METHYLOCTANOIC ACID

Male coconut minoceros 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.

• 出版日期1995-10