Dissertation
LANDSCAPE ECOLOGY AND MANAGEMENT OF THE BROWN MARMORATED STINK BUG IN THE PACIFIC NORTHWEST
Washington State University
Doctor of Philosophy (PhD), Washington State University
01/2021
DOI:
https://doi.org/10.7273/000005503
Handle:
https://hdl.handle.net/2376/119370
Abstract
Successful management of the invasive brown marmorated stink bug, Halyomorpha halys Stål (Hemiptera: Pentatomidae), relies upon an accurate understanding of its biology and ecology. I examined aspects of the host plant suitability, management, and parasitoid interactions of H. halys in the Pacific Northwest (PNW). The potential of a native PNW semi-arid plant assemblage to support H. halys development was assessed in laboratory studies. H. halys successfully completed development on the native plant diet, but had lower survivorship, longer developmental times, and lower adult weights than those fed a high-quality diet, indicating that the native diet was suboptimal. The potential of high-throughput sequencing for reconstructing H. halys feeding histories was examined through controlled feeding studies. Targeted regions of the host plants’ chloroplast genome were readily detected three days after feeding, with some persisting at 14 days, suggesting that gut content analysis of H. halys may be used to provide detailed dietary histories of field-collected insects. The efficacy of long-lasting insecticide netting (LLIN) traps for attract-and-kill (AK) management of H. halys was evaluated in fruit orchards over three seasons. Trap captures for two trap designs, the ‘ghost’ trap and the ‘poncho’ trap, were compared in 2018 and 2019, and fruit damage was assessed in 2019. Approximately three times more H. halys were recovered from poncho traps in both years, but fruit damage was not significantly affected by either trap compared to the control. The management potential of a simplified LLIN AK trap was evaluated in 2020. Fruit damage was significantly reduced by the addition of LLIN traps, though levels were still high. The reproductive and nonreproductive effects of the parasitoid Trissolcus japonicus on H. halys and the native pentatomids Chinavia hilaris, Euschistus conspersus, and Podisus maculiventris were evaluated using field-deployed sentinel egg masses and a T. japonicus-specific PCR primer. Nonreproductive effects of parasitism were highly variable, but were more important than reproductive effects for all three native species. P. maculiventris in particular was severely impacted, suffering overall 60% parasitoid-induced mortality from T. japonicus.
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Details
- Title
- LANDSCAPE ECOLOGY AND MANAGEMENT OF THE BROWN MARMORATED STINK BUG IN THE PACIFIC NORTHWEST
- Creators
- James Robert Hepler
- Contributors
- Elizabeth Beers (Advisor)William Rodney Cooper (Committee Member)Tobin Northfield (Committee Member)Benjamin Zamora (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Department of Entomology
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 144
- Identifiers
- 99900592360301842
- Language
- English
- Resource Type
- Dissertation