【目的】 明确松树蜂Sirex noctilio Fabricius雌雄成虫飞行能力随日龄的变化以及线虫Deladenus siricidicola Bedding侵染对松树蜂飞行能力的影响，为研究松树蜂扩散规律及评估线虫防治松树蜂效果提供重要参考资料。【方法】 从黑龙江省鹤岗市采集樟子松虫害木，于室内饲养羽化获得松树蜂成虫。利用佳多飞行磨系统对实验种群松树蜂的1、2、3、4、5、6、7、8日龄的雌雄成虫个体分别进行12 h连续吊飞试验，测定其累计飞行距离、累计飞行时间、平均飞行速度。【结果】 随日龄增加，松树蜂雌雄成虫在12 h内的累计飞行距离和累计飞行时间呈下降趋势。不同日龄雌成虫的平均飞行速度存在显著差异，随日龄增加，平均飞行速度逐渐下降；不同日龄雄成虫的平均飞行速度无显著差异。不同性别松树蜂飞行能力有差异，雌性相比雄性累计飞行距离和累计飞行时间普遍较高；而不同性别成虫间平均飞行速度未存在显著差异。性别和日龄的互作对松树蜂累计飞行距离的影响达到了显著水平。线虫侵染对雌雄成虫飞行能力（累计飞行距离、累计飞行时间、平均飞行速度）的影响均不显著。【结论】 随日龄增加，松树蜂雌雄成虫飞行能力呈下降趋势，雌虫比雄虫的飞行能力较强；线虫侵染对雌雄成虫飞行能力无显著影响。

[Objectives]  To determine the effect of age and infection by the nematode Deladenus siricidicola Bedding on the flight capacity of Sirex noctilio. [Methods]  Insects were obtained from the trunks of Pinus sylvestris var. mongolica Litv. in Hegang Heilongjiang province and reared indoors under laboratory conditions. The flight capacity of adult S. noctilio of 1, 2, 3, 4, 5, 6, 7 and 8 days of age was tested for 12 h in a Jiaduo flight mill system. Total flight distance, total flight duration and average flight speed were recorded. [Results]  Total flight distance and total flight duration declined with age. There was a significant difference in average flight speed among females of ages, and average flight speed gradually declined with age. However, there was no significant difference in average flight speed among males of different ages. The flight capacity of the sexes differed; females generally had a longer total flight distance and total flight duration than males but there was no significant difference between the sexes in average flight speed. Total flight distance was affected by a significant interaction between sex and age. Nematode infection had no obvious influence on the flight capacity of S. noctilio. [Conclusion]  The flight capacity of S. noctilio decreases with age and the females have greater flight capacity than males. Nematode infection appears to have no significant effect on flight capacity.