目的 本研究旨在明确山西省沁水县松墨天牛发生规律及危害特征，为有效防控松墨天牛在山西省内进一步扩散蔓延并阻断松材线虫入侵山西省提供理论科学依据。 方法 于2019— 2022年，采用“动态监测法”连续4 a悬挂松墨天牛诱捕器监测松墨天牛成虫种群发生动态并分析成虫形态特征；结合“总有效积温定律”和气象数据，推算山西省沁水县松墨天牛发生世代数；建立24块标准样地，采用“每木检尺法”调查样地内的乔木树种遭受松墨天牛危害情况，同时选取36株危害致死的白皮松进行立木解剖，以明确松墨天牛在寄主树种白皮松上的发生危害规律。 结果 山西省沁水县松墨天牛雌雄成虫的鞘翅长、触角长、触角长/体长、胫节长、股节长这5个指标在雌雄之间的差异达到显著水平，可使用松墨天牛成虫“触角长/体长”作为松墨天牛性别判定的形态指标；松墨天牛在山西省沁水县约为1年1代，松墨天牛成虫的发生期约为5月下旬至10月上旬，其中始见期为5月下旬，始盛期为6月中旬，羽化高峰期为6月中旬至7月中下旬，盛末期为7月中下旬，终见期为10月上旬；在山西省沁水县，松墨天牛主要危害径级为2.50～17.50 cm白皮松树，其中幼虫主要分布于树干0～1 m （41.54%）处，羽化孔则主要集中于树干1～2 m （28.62%）范围内。 结论 松墨天牛在山西省沁水县发生世代约为1年1代，雌雄成虫形态特征差异显著；成虫发生期约为5月下旬至10月上旬，羽化高峰期主要集中在6月中旬至7月中下旬；松墨天牛在山西省沁水县主要危害白皮松树，幼虫虫口密度和羽化孔数量主要集中在树干0～2 m范围内。

[Objective] The morphology and biology of Pristiphora conjugata (Dahlbom) were studied to lay a basis for controlling this pest. [Method] The morphology, life history and effects of temperature on adult life-span of Pristiphora conjugata were studied in both laboratory and field. [Result] The results showed that P. conjugata has 6 generations per year in Wuqing district of Tianjin and it took 2038 days to complete one generation. The pupae of P. conjugata overwinter in top soil or at the base of trees. The newly-hatched larvae of the first generation were observed on April 25th and the generations overlapped from May to September. The mature larvae pupate inside a cocoon in the soil in late September. The larvae have enormous appetite and gregarious. The temperature has significant effect on adult life-span of P. conjugata:the high temperature (30℃, 25℃) was unfavorable to its survival, and adults have the longest life-span under 20℃ condition. [Conclusion] P. conjugata has 6 generations per year in Tianjin and the temperature has significant effect on adult life-span.