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
| Autor: | Scott M. Salom, Ashley Toland, Carlyle C. Brewster, Katlin Mooneyham |
|---|---|
| Přispěvatelé: | Entomology |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Laricobius osakensis food.ingredient Adelges tsugae Biological pest control Zoology Laricobius 010603 evolutionary biology 01 natural sciences law.invention food law Quarantine Adelgidae Larva Derodontidae Tsuga canadensis biology Forestry lcsh:QK900-989 classical biological control biology.organism_classification Hemiptera 010602 entomology monitoring lcsh:Plant ecology Hemlock woolly adelgid |
| Zdroj: | Forests Volume 9 Issue 8 Forests, Vol 9, Iss 8, p 496 (2018) |
| ISSN: | 1999-4907 |
| DOI: | 10.3390/f9080496 |
| Popis: | 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&ndash 2016), limited numbers of L. osakensis were recovered, as HWA populations were still rebounding. In the second year (2016&ndash 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. |
| Databáze: | OpenAIRE |
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