关键词: 桃红颈天牛, 交配行为, 产卵行为, 寄主选择性, 蛀干害虫

Abstract: 【Aim】 The red-necked longhorn beetle, Aromia bungii, is a wood-borer of the tree species of the family Rosaceae, in which many species are fruit and ornamental trees. This study aims to ascertain the mating and oviposition behaviors of A. bungii adults and their perching and oviposition preference on different host plants. 【Methods】 Logs of eight host plants including Malus pumila, Prunus serrulata var. spontanea, Prunus persica, Malus micromalus, Prunus tomentosa, Pyrus ussuriensis, Prunus armeniaca, and Prunus cerasifera var. atropurea were chosen as the tested hosts, the mating and oviposition behaviors of A. bungii adults were observed, and the numbers of A. bungii adults perching on the eight host logs and the numbers of eggs laid on different host logs were determined by multi-selection experiments. 【Results】 The mating behaviors of A. bungii adults include three processes, i.e., avoiding, fighting and mating. The mating occurs in the order of three stages, i.e., encountering and pairing, mating attempt and ejaculation, and post-copulatory guarding. The females prefer to oviposit in bark crevices without gnawing a niche. The host log selection experiments showed that the females preferred to perch on P. persica logs, while the males preferred to perch on P. tomentosa logs. The logs of P. persica of the subfamily Prunoideae were the most favorite host for oviposition of A. bungii. Females laid very few eggs on the logs of M. pumila, M. micromalus and P. ussuriensis of the subfamily Maloideae. The results of correlation analysis showed that there was a positive correlation between the number of female adults perching on one host and the proportion of eggs laid on one host, and between the numbers of male and female adults perching on one host. 【Conclusion】 Female adults of A. bungii prefer P. persica logs rather than logs of other tree species. The preferences of male and female adults to hosts are not exactly the same.

Key words: Aromia bungii, mating behavior, oviposition behavior, host preference, wood borer