【摘要】 【目的】调查福建省夜蛾黑卵蜂和螟黄赤眼蜂2种草地贪夜蛾卵寄生蜂的田间寄生状况，明确其自然控害作用，为草地贪夜蛾天敌资源的保护与利用提供参考依据。【方法】2022年7—9月和2023年7—10月，分别在福建省漳州市长泰区、福州市闽侯县、三明市三元区和南平市建阳区，采用五点取样法调查采集田块内玉米植株上的卵块并带回实验室内。每日观察记录卵孵化情况与寄生蜂羽化情况，直至各卵块中的卵粒全部孵化或寄生蜂全部羽化；对未孵化或未有寄生蜂羽化的卵粒，通过镜检判断卵粒中死亡个体所属种类。统计草地贪夜蛾卵块和卵粒数量、2种寄生蜂寄生的卵块和卵粒数量，计算卵块寄生率和卵粒寄生率。【结果】调查发现夜蛾黑卵蜂和螟黄赤眼蜂可各自单独寄生或共同寄生草地贪夜蛾卵块。在福建省4个调查地区，2022年和2023年2种寄生蜂对草地贪夜蛾的卵块寄生率分别为36.91%～80.95%、50.64%～82.35%；采集的草地贪夜蛾卵块中，夜蛾黑卵蜂单独寄生率和2种寄生蜂共同寄生率均高于螟黄赤眼蜂单独寄生率。在福建省4个调查地区，2022年和2023年2种寄生蜂对草地贪夜蛾的卵粒寄生率分别为16.88%～53.08%、16.02%～51.38%;2种寄生蜂共同寄生卵块中卵粒寄生率高于夜蛾黑卵蜂单独寄生卵块中卵粒寄生率和螟黄赤眼蜂单独寄生卵块中卵粒寄生率；同时，在2种寄生蜂共同寄生卵块中，夜蛾黑卵蜂的卵粒寄生率显著（P<0.05）或极显著（P<0.01）高于螟黄赤眼蜂的卵粒寄生率。【结论】夜蛾黑卵蜂和螟黄赤眼蜂2种草地贪夜蛾卵寄生蜂具有良好的田间自然控害效果，其中夜蛾黑卵蜂的寄生能力更强。更多还原

【Abstract】 【Objective】A survey was carried out in Fujian Province to investigate the field parasitism of Spodoptera frugiperda eggs by two parasitoid species, Telenomus remus and Trichogramma chilonis, aiming to clarify their roles as local natural enemies in natural pest control and to provide a reference for the protection and utilization of natural enemy resources against the Spodoptera frugiperda. 【Method】From July to September 2022 and from July to October 2023, egg masses on maize plants were collected using the five-point sampling method from the fields in Changtai District of Zhangzhou City, Minhou County of Fuzhou City, Sanyuan District of Sanming City, and Jianyang District of Nanping City, Fujian Province, and the collected egg masses were brought back to the laboratory. Observations on egg hatching and parasitoid emergence were conducted daily until all eggs within each egg mass had either hatched or all parasitoids had emerged. For eggs that neither hatched nor produced emerging parasitoids, the species identity of the dead individuals was determined through microscopic examination. The numbers of Spodoptera frugiperda egg masses and individual eggs, as well as the numbers of egg masses and eggs parasitized by the two parasitoids, were recorded, and the egg mass parasitism rate and egg parasitism rate were calculated. 【Result】The investigation showed that two parasitoid species can parasitize Spodoptera frugiperda egg masses either individually or jointly. In the 4 sureyed areas of Fujian Province, the egg mass parasitism rates of the Spodoptera frugiperda by the two parasitoids ranged from 36.91% to 80.95% in 2022 and from 50.64% to 82.35% in 2023. Among the collected Spodoptera frugiperda egg masses, the single-species parasitism rate of Telenomus remus and the co-parasitism rate of the two parasitoid species were both higher than the single-species parasitism rate of Trichogramma chilonis. Within co-parasitized egg masses, the egg parasitism rate of Telenomus remus was significantly(P<0.05) or highly significantly(P<0.01) higher than that of Trichogramma chilonis.【Conclusion】The two egg parasitoids of Spodoptera frugiperda, Telenomus remus and Trichogramma chilonis, demonstrate effective natural pest control in the field, with Telenomus remus exhibiting stronger parasitism capacity.更多还原