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Physiological host range and occurrence of Trissolcus japonicus, a parasitoid of the brown marmorated stink bug in southern Ontario

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Title: Physiological host range and occurrence of Trissolcus japonicus, a parasitoid of the brown marmorated stink bug in southern Ontario
Author: MacDonald, Caitlin
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Scott-Dupree, CynthiaGariepy, Tara
Abstract: Trissolcus japonicus (Hymenoptera: Scelionidae), is an egg parasitoid of Halyomorpha halys (Hemiptera: Pentatomidae), the brown marmorated stink bug. Halyomorpha halys is a serious invasive agricultural pest in Europe and North America, and insecticides appear to be of limited efficacy. Trissolcus japonicus is being considered as a classical biological control agent in regions where H. halys is established, and has been discovered in London, Ontario in 2017. This thesis investigated the occurrence of T. japonicus in southern Ontario, as well as its physiological host range on non-target stink bugs in Ontario. Data collected in 2019 and 2020 demonstrated that T. japonicus populations continue to persist in London, but were not found in other areas of southern Ontario. The physiological host range of T. japonicus was demonstrated to include six out of nine non-target stink bugs, and three of these six stink bugs were less likely to be attacked than H. halys.
URI: https://hdl.handle.net/10214/26467
Date: 2021-09
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