The lethal and sub-lethal consequences of entomopathogenic nematode infestation and exposure for adult pine weevils, Hylobius abietis (Coleoptera: Curculionidae)
Article
Girling, R.D., Ennis, D., Dillon, A.B. and Griffin, C.T.. 2010. "The lethal and sub-lethal consequences of entomopathogenic nematode infestation and exposure for adult pine weevils, Hylobius abietis (Coleoptera: Curculionidae)." Journal of Invertebrate Pathology. 104 (3), pp. 195-202. https://doi.org/10.1016/j.jip.2010.04.003
Article Title | The lethal and sub-lethal consequences of entomopathogenic nematode infestation and exposure for adult pine weevils, Hylobius abietis (Coleoptera: Curculionidae) |
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ERA Journal ID | 2939 |
Article Category | Article |
Authors | Girling, R.D., Ennis, D., Dillon, A.B. and Griffin, C.T. |
Journal Title | Journal of Invertebrate Pathology |
Journal Citation | 104 (3), pp. 195-202 |
Number of Pages | 8 |
Year | 2010 |
Publisher | Elsevier |
Place of Publication | United States |
ISSN | 0022-2011 |
1096-0805 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jip.2010.04.003 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0022201110000844 |
Abstract | Entomopathogenic nematodes (EPN) frequently kill their host within 1–2days, and interest in EPN focuses mainly on their lethality. However, insects may take longer to die, or may fail to die despite being infected, but little is known about the effects of EPN infection on insects, other than death. Here we investigate both lethal and sub-lethal effects of infection by two EPN species, Steinernema carpocapsae and Heterorhabditis downesi, on adults of the large pine weevil, Hylobius abietis. Following 12h nematode–weevil contact in peat, S. carpocapsae killed a significantly higher proportion of weevils (87–93%) than H. downesi (43–57%) at all concentrations tested. Less than 10% of weevils were dead within 2days, and weevils continued to die for up to 10days after exposure (LT50 of 3days or more). In a separate experiment, live weevils dissected 6days after a 24h exposure to nematodes on filter paper harbored encapsulated and dead nematodes, showing that weevils could defend themselves against infection. Some live weevils also harbored live nematodes 6days after they had been removed from the nematode infested medium. Feeding by weevils was not affected by infection with, or exposure to, either species of EPN. We discuss these results in relation to the use of EPN in biological control against H. abietis. |
Keywords | Hylobius abietis; Steinernema carpocapsae; Feeding behavior; Heterorhabditis downesi; Biological control; LT50; LT90 |
ANZSRC Field of Research 2020 | 300704. Forest health and pathology |
310901. Animal behaviour | |
310301. Behavioural ecology | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Institute of Bioengineering and Agroecology, Ireland |
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