Host Range of &lt;I&gt;Laricobius osakensis&lt;/I&gt; (Coleoptera: Derodontidae), a New Biological Control Agent of Hemlock Woolly Adelgid (Hemiptera: Adelgidae)

Vieira, L. C.; McAvoy, Thomas J.; Chantos, Jillian Marie; Lamb, Ashley; Salom, Scott M.; Kok, Loke T.

doi:10.1603/en10193

Cited by 25 publications

(12 citation statements)

References 27 publications

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“…Both the adults and larvae of L. osakensis feed on and are highly host-specific to HWA. The predator prefers to feed and oviposit on HWA over other adelgid and closely related non-adelgid species in laboratory tests, posing little risk to native fauna [12]. It has also been shown in laboratory studies that L. osakensis has no negative impact on L. nigrinus or L. rubidus, when co-occurring on HWA infested hemlock branches [13].…”

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confidence: 98%

First Report on Establishment of Laricobius osakensis (Coleoptera: Derodontidae), a Biological Control Agent for Hemlock Woolly Adelgid, Adelges tsugae (Hemiptera: Adelgidae), in the Eastern U.S.

Toland

Brewster

Mooneyham³

et al. 2018

Forests

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The hemlock woolly adelgid (HWA) is an invasive insect species native to Japan causing significant hemlock mortality in the eastern United States. Laricobius spp. have been targeted as biological control agents because they are adelgid specialists. Laricobius osakensis Montgomery and Shiyake is native to the same region of Japan from which the strain of HWA found in the eastern United States originated. Studies in Japan found that it is phenologically synchronous with HWA. Following approval to release L. osakensis from quarantine in 2010, approximately 32,000 were released at a total of 61 sites starting in 2012. In winter of 2014 and 2015, periods of extreme cold temperatures throughout the eastern USA, as well as the polar vortex, resulted in extensive mortality to HWA, which likely delayed the establishment of L. osakensis. The ability of the beetle to survive and establish in the eastern United States is reported here. In the first year of this study (2015–2016), limited numbers of L. osakensis were recovered, as HWA populations were still rebounding. In the second year (2016–2017), 147 L. osakensis were collected at 5 of 9 sites sampled, coinciding with rebounding HWA populations. Larval recovery was much greater than adult recovery throughout the study. HWA density was directly correlated with warmer plant hardiness zones and recovery of Laricobius beetles was significantly correlated with HWA density. Our results suggest that L. osakensis is successfully establishing at several of the sampled release sites and that the best predictor of its presence at a site is the HWA density.

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confidence: 98%

First Report on Establishment of Laricobius osakensis (Coleoptera: Derodontidae), a Biological Control Agent for Hemlock Woolly Adelgid, Adelges tsugae (Hemiptera: Adelgidae), in the Eastern U.S.

Toland

Brewster

Mooneyham³

et al. 2018

Forests

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“…The goal of this study was to determine whether low recovery numbers were due to beetles being intolerant at low temperatures or other factors (i.e., lack of primary food source, A. tsugae) by comparing the supercooling points of the northern and southern populations of L. osakensis, L. nigrinus, and L. rubidus from November 2016-March 2017. Laricobius osakensis and L. nigrinus have limited ability to feed on other prey species, making it difficult for them to survive when there are extreme fluctuations in A. tsugae populations [33,34]. Since P. strobi appears to experience negligible winter mortality [13] and A. tsugae shows much greater susceptibility to low temperatures [5,6], we hypothesized that their respective specialist predators might also express varying degrees of cold hardiness.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Assessment of Supercooling Points for Two Introduced and One Native Laricobius spp. (Coleoptera: Derodontidae), Predators of Adelgidae

Toland

Wantuch

Mullins

et al. 2019

Insects

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The hemlock woolly adelgid, Adelges tsugae Annand, is an invasive insect that threatens hemlock species in eastern North America. Several species from the genus Laricobius are predators of A. tsugae in its native areas of Asia and the western United States. Two Laricobius species have been released as biological control agents: Laricobius nigrinus Fender, and Laricobius osakensis Montgomery and Shiyake. Laricobius rubidus LeConte is an adelgid predator native to the Eastern United States, where it can feed and complete development on A. tsugae opportunistically. Laboratory assays were conducted to assess the cold hardiness of these three Laricobius species, including two distinct populations of L. osakensis, by measuring the supercooling points of each species from November 2016 through March 2017. This information may be useful for choosing the best-suited biological control agent for a particular region to control A. tsugae. There was a significant difference between the overall mean supercooling point of L. rubidus compared to the other Laricobius spp. There were also significant differences of supercooling points between L. rubidus and both strains of L. osakensis in January, and significant differences between L. rubidus and all other strains in February. L. rubidus appear better adapted to cold extremes in the eastern U.S. than imported Laricobius spp.

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“…Three different types of host range evaluation tests, sequential no-choice tests, static long exposure nochoice tests, and static choice tests, were conducted in quarantine with D. citri (target) and seven NTP species. The results of these host range assessment studies are part of this growing body of work in classical arthropod biological control , Andreassen et al 2009, Murray et al 2010, Mason et al 2011, Vieira et al 2011. Host Plant Production for D. citri Colonies in Quarantine and Rearing.…”

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confidence: 99%

Host Range Testing of <I>Tamarixia radiata</I> (Hymenoptera: Eulophidae) Sourced From the Punjab of Pakistan for Classical Biological Control of <I>Diaphorina citri</I> (Hemiptera: Liviidae: Euphyllurinae: Diaphorinini) in California

Hoddle

Pandey

2014

jnl. econ. entom.

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Tests evaluating the host range of Tamarixia radiata (Waterson) (Hymenoptera: Eulophidae), a parasitoid of the pestiferous Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), sourced from the Punjab of Pakistan, were conducted in quarantine at the University of California, Riverside, CA. Seven nontarget psyllid species (five native and two self-introduced species) representing five families were exposed to T radiata under the following three different exposure scenarios: 1) sequential no-choice tests, 2) static no-choice tests, and 3) choice tests. Nontarget species were selected for testing based on the following criteria: 1) taxonomic relatedness to the target, D. citri; 2) native psyllids inhabiting native host plants related to citrus that could release volatiles attractive to T. radiata; 3) native psyllids with a high probability of occurrence in native vegetation surrounding commercial citrus groves that could be encountered by T. radiata emigrating from D. citri-infested citrus orchards; 4) a common native pest psyllid species; and 5) a beneficial psyllid attacking a noxious weed. The results of host range testing were unambiguous; T radiata exhibited a narrow host range and high host specificity, with just one species of nontarget psyllid, the abundant native pest Bactericera cockerelli Sulc, being parasitized at low levels (< 5%). These results suggest that the likelihood of significant nontarget impacts is low, and the establishment of T. radiata in southern California for the classical biological control of D. citri poses negligible environmental risk.

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Host Range of <I>Laricobius osakensis</I> (Coleoptera: Derodontidae), a New Biological Control Agent of Hemlock Woolly Adelgid (Hemiptera: Adelgidae)

Cited by 25 publications

References 27 publications

First Report on Establishment of Laricobius osakensis (Coleoptera: Derodontidae), a Biological Control Agent for Hemlock Woolly Adelgid, Adelges tsugae (Hemiptera: Adelgidae), in the Eastern U.S.

First Report on Establishment of Laricobius osakensis (Coleoptera: Derodontidae), a Biological Control Agent for Hemlock Woolly Adelgid, Adelges tsugae (Hemiptera: Adelgidae), in the Eastern U.S.

Seasonal Assessment of Supercooling Points for Two Introduced and One Native Laricobius spp. (Coleoptera: Derodontidae), Predators of Adelgidae

Host Range Testing of <I>Tamarixia radiata</I> (Hymenoptera: Eulophidae) Sourced From the Punjab of Pakistan for Classical Biological Control of <I>Diaphorina citri</I> (Hemiptera: Liviidae: Euphyllurinae: Diaphorinini) in California

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