【目的】 深入了解亚洲柑橘木虱Diaphorina citri Kuwayama的生物学习性，为有效防治和阻止其传播黄龙病提供依据。【方法】 利用昆虫行为观测仪对雌、雄成虫在九里香上的取食、交尾行为进行观察，比较雌、雄成虫在嫩梢和成熟梢上取食行为的差异。【结果】 雌、雄成虫在嫩梢和成熟梢上总的取食时间都没有显著差异。但是，雌成虫在成熟梢上的取食时间显著长于在嫩梢上，而雄成虫没有显著差异。在嫩梢上，雌雄成虫都更倾向于取食嫩茎，其次为叶片，叶柄上最少，其中雌成虫在嫩茎上取食时间显著长于叶片和叶柄。在成熟梢上，雌成虫在叶背的取食时间显著长于叶面和茎，而雄成虫在叶面和叶背的取食时间没有显著差异，并且在叶面的取食时间显著长于茎。交尾开始时，雄成虫将腹部末端的抱握器从雌成虫腹部下方抱住其产卵器，然后进行交尾，交尾过程中雄成虫间歇性地抖动远离雌虫的后足。交尾结束时，雄成虫先收缩腹部，使双方腹部末端下垂，呈弓型，然后雌雄成虫在合体的情况下共同行走一段距离后再分开，交尾时间持续约40 min。【结论】 雌雄虫的取食行为有差异，雌虫在成熟梢上取食时间长于嫩梢且嗜食成熟叶的叶背。雌雄1次交尾持续时间约40 min。

 [Objectives]  To provide basic knowledge required for the effective control of the Asian citrus psyllid Diaphorina citri Kuwayama and thereby prevent the transmission of Huanglong disease. [Methods]  The feeding and mating behavior of adult D. citri on Murraya exotica L. were observed and the amount of time females and males spent feeding on different parts of young and mature shoots was recorded and compared. [Results]  There was no significant difference in total feeding duration between females and males on young or mature shoots. The feeding duration of females on mature shoots was, however, significantly longer than that on young shoots, whereas there was no significant difference in the amount of time males spent feeding on young and mature shoots. Both males and females preferred the stems of young shoots the most, followed by the leaves, then the petioles. Females spent significantly longer feeding on the stems of young shoots than on the leaves or petioles, whereas males had no significant preference. Males and females preferred different parts of mature shoots. The feeding duration of females on the abaxial (lower) surface of leaves was significantly longer than that on the adaxial (upper) surface of leaves and stems. However, the feeding duration of males on the abaxial and adaxial surface of leaves was not significantly different, and they fed significantly longer on the adaxial surface of leaves than on stems. Before mating, males clasped the ovipositor from the underside of the female’s abdomen and intermittently shook their distal hind foot during mating. Before completing mating, males retracted their abdomen so that the ends of both the male and female abdomen sagged and became bow shaped. After mating, males and female walked together for some distance before separating. Mating lasted about 40 minutes. [Conclusion]  Females and males have different feeding behavior and different preferred feeding locations. Females feed much longer on mature shoots than on young shoots and prefer abaxial surface of the leaves.