【目的】 沙棘木蠹蛾Eogystia hippophaecolus (Hua, Chou, Fang et Chen)是严重危害沙棘林的重大钻蛀性害虫。在辽宁建平，4年1代，幼虫16龄。本试验旨在研究辽宁建平沙棘木蠹蛾的成虫发生规律，明确其幼虫虫口数量与成虫诱捕量之间的关系，为建立基于“3S”和昆虫性信息素诱捕耦合的虫灾监测技术提供基础数据。【方法】 于栽植的健康沙棘根部接入不同虫龄的幼虫，统计可发育为老熟幼虫，入土化蛹并羽化为成虫的幼虫龄期范围。设定样地，采用随机抽样法调查各样地幼虫数量并悬挂性信息素诱捕器对成虫进行监测。将成虫诱捕量与不同龄期范围的幼虫数量进行曲线回归分析，获得监测林间幼虫数量的最优模型。【结果】 5月下旬时已达12~16龄的幼虫均可在当年发育为老熟幼虫，入土化蛹并羽化为成虫。沙棘木蠹蛾在辽宁建平经历3个羽化高峰，在不同乡镇，其成虫期长短有较大差别（76~95 d不等）。当年13~16龄幼虫数量与成虫诱捕量的二次函数拟合效果最佳，即y=0.001x²+0.321x+38.783，R²=0.649，P<0.05。【结论】 明确了沙棘木蠹蛾幼虫在辽宁建平当年可入土化蛹并羽化为成虫的龄期范围，确定了其在3个试验地的成虫期和羽化高峰，构建了通过性信息素诱捕成虫以监测林间幼虫虫口数量的数学模型，为航空、航天遥感的虫灾监测提供技术支撑。

[Objectives]  To investigate the frequency of occurrence of Egystia hippophaecolus (Hua, Chou, Fang et Chen) adults and the correlation between numbers of larvae and numbers of adults caught in sex pheromone traps. To provide baseline data for the establishment of"3S" and sex pheromone trap monitoring techniques. E. hippophaecolus is a wood-boring insect that damages shrubs. Its larval development can be divided into 16 instars, and it needs 4 years per generation in Liaoning province. [Methods]  We introduced each instar larvae to the roots of planted healthy seabuckthorn shrubs and monitored pupation and molting over a year to determine the final stadium. We used random sampling to determine the numbers of larvae in each sample and suspended pheromone traps to trap adults. Curvilinear regression analysis was used to develop an optimal model of the relationship between the number of adults trapped with sex pheromone baits in the current year and the number of larvae in different stadia. [Results]  12-16^th instar larvae mature in late May after which they burrow into the soil to pupate and molt into adults. There were three adult molting peaks in Jianping county, Liaoning province. The adult period was quite variable (76 to 95 days). In all regression equations there was a significant relationship between numbers of 13-16^th instar larvae and numbers of trapped adults; the highest R² values were obtained from the quadratic function, y=0.001x²+0.321x+38.783, R²=0.649, P<0.05. [Conclusion]  E. hippophaecolus larvae can pupate and molt into adults in Liaoning province. Adult periods were variable and there were three molting peaks. A mathematical model of the relationship between numbers of larvae and adults will be useful for using remote sensing technology to monitor the abundance of this pest.