Behavioral rhythms of the oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera:Tortricidae) | 梨小食心虫成虫行为节律研究

Chinese. 研究梨小食心虫成虫行为节律，为开展梨小食心虫化学生态学研究及其综合治理奠定基础。在人工气候箱（温度（24±0.5） ℃、相对湿度（70±10）%、光周期为15 h光期和9 h暗期）条件下，系统观测了梨小食心虫成虫羽化、交配及产卵行为节律。梨小食心虫成虫的羽化具有明显的昼夜节律，主要发生在光期05:00-10:00这个时段，此时成虫的羽化数量占总羽化数量的90%以上，其中以05:00-06:00羽化率最高，与其他时段差异显著；成虫的求偶交配行为多发生在羽化后第3天，呈“一”字形交配，单次交配持续时间为11～35 min，平均为22.07 min，成虫交配活动主要发生在17:00-21:00，交配率超过90%；梨小食心虫雌成虫的产卵节律与其交配节律颇具相似性，其产卵活动也主要发生在17:00-21:00，该时段所产卵量达到总产卵量的87.43%，显著高于其他时段。梨小食心虫成虫的羽化、交配及产卵行为具明显的生物节律，其中羽化行为主要发生在上午_05:00-_10:00，交配和产卵行为主要发生在傍晚17:00-21:00。

English. Behavioral rhythms of the oriental fruit moth, Grapholita molesta (Busck),were studied in order to provide a theoretical reference for the chemical ecology and integrated management of G.molesta. The emergence, mating and oviposition behaviors of G.molesta were investigated with a 15 h∶9 h (L∶D) light cycle at temperature of (24±0.5) ℃ and RH of (70±10)% in the laboratory. Results indicated that G.molesta emergence had a significant diel rhythm. 90% of G.molesta emerged in 05:00-10:00 am of photophase, especially, the highest emergence rate occurred in 05:00-06:00 am. The calling behavior of G.molesta mainly occurred from the 3rd days after emergence. Adults of G.molesta mated with a copulatory posture of Chinese character of one. The single adult mating duration was between 11-35 min,with a mean value of 22.07 min.More than 90% of mating occurred in 17:00-21:00.pm; The oviposition rhythm of G.molesta was the same as the mating rhythm, 87.43% female adults oviposited in 17:00-21:00 pm. The emergence, mating and oviposition behaviors of G.molesta have a significant biological rhythm. Emergence activities mainly occur in 05:00-10:00 am, while mating and oviposition activities mainly occur in 17:00-21:00 pm.