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Seasonal parasitism of native egg parasitoids of brown marmorated stink bug (Halyomorpha halys) in Japan

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Abstract

The invasive, Halyomorpha halys (Hemiptera: Pentatomidae), is a severe economic insect pest native to East Asia. A strong effort has been made to identify natural egg parasitoids of H. halys in invaded regions, but parasitism rates reported from these studies have been inconsequentially low. To determine the species composition, phenology, and efficiency of egg parasitoids in the native region of H. halys, we deployed fresh and frozen sentinel H. halys egg masses from March through December in Kyoto, Japan. Our findings provide valuable insights on the abundance and parasitism rates of native H. halys parasitoids in Japan. A total of seven parasitoid species emerged from the sentinel egg masses, but Trissolcus japonicus had the highest parasitism rate of all parasitoids recovered (84% on fresh egg masses) and maintained the largest portion of the total parasitoid species composition (60% on fresh egg masses). The early season parasitoid community in Kyoto, Japan, is dominated by T. japonicus, with the first parasitism activity occurring in March. Throughout the course of the field study, T. japonicus also sustained a significantly higher parasitism rate on fresh H. halys eggs than frozen. The results from this research help expand the understanding of parasitoids in the native region of H. halys and hold importance for the future development of biological control programs against this invasive pest.

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Availability of data and material

All the sequences have been deposited in GenBank with accession numbers provided in the main text. All parasitoid samples can be made accessible upon request to the first and corresponding authors.

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Acknowledgements

We express the deepest gratitude and sympathy to the family, friends, colleges, and collaborators of Dr. Tsuyoshi Yoshimura from Kyoto University, a co-author who tragically passed away during this research. We would like to thank the Earth Corporation Ako Plant and the Hohto Shoji Co. for providing funding (to CCSY) as well as insects for this research. We also thank Prof. Chow-Yang Lee from University of California, Riverside, for supplying essential tools for our field work. Funding was also provided by the Japanese Government Monbukagakusho (MEXT) (to MTK) Scholarship and the Virginia Tech Faculty Start-up Research Fund (to CCSY).

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Correspondence to Chin-Cheng Scotty Yang.

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Communicated by Tim Haye.

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Kamiyama, M.T., Matsuura, K., Hata, T. et al. Seasonal parasitism of native egg parasitoids of brown marmorated stink bug (Halyomorpha halys) in Japan. J Pest Sci 95, 1067–1079 (2022). https://doi.org/10.1007/s10340-021-01455-3

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  • DOI: https://doi.org/10.1007/s10340-021-01455-3

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