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.
| dc.contributor.author | Toland, Ashley | en |
| dc.contributor.author | Brewster, Carlyle C. | en |
| dc.contributor.author | Mooneyham, Katlin | en |
| dc.contributor.author | Salom, Scott M. | en |
| dc.contributor.department | Entomology | en |
| dc.date.accessioned | 2018-08-22T14:58:30Z | en |
| dc.date.available | 2018-08-22T14:58:30Z | en |
| dc.date.issued | 2018-08-14 | en |
| dc.date.updated | 2018-08-22T08:32:31Z | en |
| dc.description.abstract | The hemlock woolly adelgid (HWA) is an invasive insect species native to Japan causing significant hemlock mortality in the eastern United States. <i>Laricobius</i> spp. have been targeted as biological control agents because they are adelgid specialists. <i>Laricobius osakensis</i> 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 <i>L. osakensis</i> 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 <i>L. osakensis</i>. 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 <i>L. osakensis</i> were recovered, as HWA populations were still rebounding. In the second year (2016–2017), 147 <i>L. osakensis</i> 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 <i>Laricobius</i> beetles was significantly correlated with HWA density. Our results suggest that <i>L. osakensis</i> 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. | en |
| dc.description.version | Published version | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | Toland, A.; Brewster, C.; Mooneyham, K.; Salom, 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.. Forests 2018, 9, 496. | en |
| dc.identifier.doi | https://doi.org/10.3390/f9080496 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/84893 | en |
| dc.language.iso | en | en |
| dc.publisher | MDPI | en |
| dc.rights | Creative Commons Attribution 4.0 International | en |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en |
| dc.subject | classical biological control | en |
| dc.subject | monitoring | en |
| dc.subject | Adelges tsugae | en |
| dc.subject | Laricobius osakensis | en |
| dc.subject | Tsuga canadensis | en |
| dc.title | 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. | en |
| dc.title.serial | Forests | en |
| dc.type | Article - Refereed | en |
| dc.type.dcmitype | Text | en |