Protection of North American ash against emerald ash borer with biological control: ecological premises and progress toward success

Duan, Jian J.; Gould, Juli R.; Quinn, Nicole F.; Petrice, Toby R.; Slager, Benjamin H.; Poland, Therese M.; Bauer, Leah S.; Rutledge, Claire E.; Elkinton, Joseph S.; Driesche, Roy G. Van

doi:10.1007/s10526-023-10182-w

Cited by 11 publications

(10 citation statements)

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“…However, EAB egg parasitism rates varied considerably among years and sites and may be attributed to the functional response of O. agrili to spatiotemporal fluctuations in EAB densities, similar to those reported by Liu et al (2007) in the insects' native range in Northeast China, and to undetermined environmental and site-specific factors. Similar variability in parasitism rates are reported for the established EAB larval parasitoids introduced as biocontrol agents at the same time at these study sites (Duan et al 2015, 2023).…”

Section: Discussionsupporting

confidence: 79%

“…In Michigan, EAB populations declined rapidly in subsequent years due to diminishing ash–host resources and the establishment of other natural enemies, further reducing EAB populations (Duan et al 2015, Kashian et al 2018). In Michigan, EAB continues to persist but at much lower population levels that fluctuate annually (Duan et al 2015, 2021, 2023). Despite the overall decline and annual fluctuations in EAB population densities in Michigan, O. agrili continues to persist at the study sites where it has been established for more than a decade (Abell et al 2014, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…As a result of the rapid spread of EAB, limited impacts from native natural enemies, and challenges posed when suppressing EAB infestations through other means, a classical biological control program was formally initiated in 2007 (Bauer et al 2015, Duan et al 2018). Ultimately, biological control may provide a long-term, low-cost, and environmentally acceptable approach to the reduction of EAB population densities below a tolerance threshold for native ash tree growth, survival, and reproduction in North America (Bauer et al 2015, Margulies et al 2017, Duan et al 2018, 2023, Kashian et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Surveys of EAB natural enemies in the native range of O. agrili in Northeast China documented EAB egg parasitism rates of 12.0–43.8% (Liu et al 2007). Postrelease studies in Michigan reported EAB egg parasitism by O. agrili to average 21.8% (Abell et al 2014, 2016); however, research on the long-term establishment, parasitism rates, and impacts on EAB populations and ash health in its introduced range are ongoing due to the long life cycle of ash trees and the complexity of ecosystem dynamics in aftermath forests (Duan et al 2017, 2023, Margulies et al 2017, Kashian et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…While several published studies have documented the establishment and impacts of introduced EAB larval parasitoids (Duan et al 2013, 2019, 2021, 2023, Jennings et al 2016, Jones et al 2019, Aker et al 2022), comparatively fewer studies are available on O. agrili establishment or impacts (Abell et al 2014, 2016, Jennings et al 2018). Given the number of O. agrili released throughout the invaded range of EAB in North America, better documentation of its establishment and impact is needed.…”

Section: Introductionmentioning

confidence: 99%

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Postrelease assessment of Oobius agrili (Hymenoptera: Encyrtidae) establishment and persistence in Michigan and the Northeastern United States

Quinn

Petrice

Schmude

et al. 2023

Journal of Economic Entomology

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The emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), is an invasive woodboring pest of ash trees (Fraxinus sp.) in North America. Among the Asiatic parasitoids being released for the management of EAB in North America, Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae) is the only EAB egg parasitoid. To date, more than 2.5 million O. agrili have been released in North America; however, few studies have examined its success as a biological control agent of EAB. We conducted studies to assess O. agrili establishment, persistence, spread, and EAB egg parasitism rates in Michigan at the earliest release sites (2007–2010), as well as at more recent release sites (2015–2016) in 3 Northeastern United States (Connecticut, Massachusetts, New York). In both regions, we documented successful O. agrili establishment at all but one release site. In Michigan, O. agrili has persisted at release sites for over a decade and spread to all control sites located 0.6–3.8 km from release sites. Overall, EAB egg parasitism ranged from 1.5% to 51.2% (mean of 21.4%) during 2016–2020 in Michigan and from 2.6% to 29.2% (mean of 16.1%) during 2018–2020 in the Northeastern states. Future research efforts should focus on factors affecting the spatiotemporal variation in EAB egg parasitism rates by O. agrili, as well as its potential range in North America.

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Section: Discussionsupporting

confidence: 79%