Abstract Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae), a solitary egg parasitoid native to China, was introduced to the United States for biocontrol of the invasive emerald ash borer (EAB) Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) in 2007. To help develop effective biocontrol-release strategies, we evaluated the effect of parental diapause and release time of the adult parasitoids on their longevity, realized fecundity, and progeny diapause rate under field conditions in the U.S. Mid-Atlantic region in 2016 and 2017. Results from two years of the study showed that both non-diapaused and diapaused O. agrili adults released in rearing containers exposed to field conditions in late spring to early summer (from May 26 to July 20th) successfully survived and reproduced on emerald ash borer eggs provided throughout the study period. The parental parasitoid diapause status and release time did not significantly affect the longevity and life-time fecundity of the released adult parasitoids except that both diapaused and non-diapaused parasitoids released on May 26th of 2017 produced significantly fewer progeny than those from later releases (June 14th and July 20th) of the same year. In both 2016 and 2017, non-diapaused parasitoids consistently produced a higher proportion of diapaused progeny than diapaused parasitoids, regardless of release times. These findings indicate that releases of O. agrili with different diapause status from late spring to early summer may cause variations in establishing overwintering parasitoid populations for biological control of emerald ash borer in the field.

中文翻译：

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亲代滞育状态和释放时间对大西洋中部引入的卵寄生物 Oobius agrili（膜翅目：螟虫科）野外生殖生物学的影响：对翡翠螟（鞘翅目：螟虫科）生物防治的影响

在春末至夏初（5 月 26 日至 7 月 20 日）暴露于田间条件的饲养容器中释放的 agrili 成虫在整个研究期间提供的翡翠灰螟虫卵上成功存活并繁殖。亲本滞育状态和释放时间对释放的成虫的寿命和终生繁殖力没有显着影响，只是 2017 年 5 月 26 日释放的滞育和非滞育寄生虫产生的后代明显少于后期释放的后代（6 月14 日和 7 月 20 日）。在 2016 年和 2017 年，无论释放时间如何，非滞育寄生蜂始终比滞育寄生蜂产生更高比例的滞育后代。这些发现表明 O.