【目的】 明确山东茶园新发现天敌巩特桨角蚜小蜂Eretmocerus gunturiensis对茶树黑刺粉虱Aleurocanthus spiuiferus的寄生特性，为茶园害虫新型绿色防控产品研发提供依据。【方法】 采用扫网法和黄板法调查桨角蚜小蜂的发生动态，利用超景深电子显微镜观察巩特桨角蚜小蜂的形态特征和测量被寄生后伪蛹大小，采用分冠层取样法调查巩特桨角蚜小蜂对黑刺粉虱的寄生特性。【结果】 巩特桨角蚜小蜂在自然界中以幼虫寄生黑刺粉虱2龄和3龄若虫，雌蜂产卵于黑刺粉虱若虫腹部腹面与叶片之间，产卵过程大约持续2 min。成虫羽化时，用口器咬破黑刺粉虱伪蛹后端的壳，破口处近圆形不整齐。巩特桨角蚜小蜂的寄生影响黑刺粉虱伪蛹的大小，被寄生黑刺粉虱伪蛹的长度和宽度均显著短于未被寄生的伪蛹（P<0.05）。在不同的茶丛位置，巩特桨角蚜小蜂寄生黑刺粉虱的寄生率存在差异，茶丛中部叶片桨角蚜小蜂的寄生率显著高于茶丛上部和下部。【结论】 山东茶园新发现的天敌巩特桨角蚜小蜂对黑刺粉虱具有良好的防控潜能。

[Objectives]  To clarify the parasitic behavior of Eretmocerus gunturiensis, a newly discovered natural enemy of Aleurocanthus spiuiferus in Shandong tea plantations, and provide data to support the research and development of new, environmentally-friendly control methods for tea pests. [Methods]  The population dynamics of E. gunturiensis were recorded using the sweep net and yellow sticky-board methods. The morphological characteristics of E. gunturiensis were observed using an ultra-depth of field electron microscope and the size of A. spiuiferus pseudopupae after parasitism, were measured. The parasitism of E. gunturiensis on A. spiuiferus was investigated using the canopy sampling method. [Results]  E. gunturiensis larvae parasitize 2nd to 3rd instar nymphs of A. spiniferus. The laying time of female adults lasts about 2 minutes, and the eggs are laid between the abdomen of A. spiniferus and the leaves. E. gunturiensis bites the shell at the posterior of the pseudopupa of A. spiniferus with its mouthparts during emergence, and resultant hole is round but irregular. Parasitism by E. gunturiensis affects the size of A. spiniferus pseudopupae. The length and width of parasitized pseudopupae were significantly shorter than those of the non-parasitized pseudopupae. The parasitism rate of E. gunturiensis was significantly higher on leaves in the middle of a tea bush than in the upper and lower bush. [Conclusion]  E. gunturiensis is a newly discovered natural enemy of A. spiniferus in Shandong tea plantations and has the potential to be a useful biological control for this pest.