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ViewAttendees 14

P-IE

Section Symposium

We Stink Too! Brown Marmorated Stink Bug Research from Early Career Professionals

9: Augmentative releases of Trissolcus japonicus for the biological control of Halyomorpha halys in Michigan

Tuesday, November 17, 2020
3:40 PM - 4:00 PM EST
Livestream
The invasive landscape pest Halyomorpha halys (Hemiptera; Pentatomidae) has been problem in Michigan since it arrived in 2010. It has since been followed in other states by its coevolved parasitoid Trissolcus japonicus (Hymenoptera; Scelionidae), which was finally found in Michigan in fall of 2018. T. japonicus was mass reared in a lab over the winter and was mass released across Lower Michigan apple orchards in the summer of 2019. Persistence of the wasp was monitored for the remainder of the summer by the use of sentinel egg masses put out in the orchards every other week for three days at a time, as well as H. halys number with pyramid traps. We caught no T. japonicus in the summer of 2019 but many other parasitoids of the stink bug were recovered. This could be caused by T. japonicus is dispersing immediately after releases, as has been the case at times in the past. There was more parasitism by more wasp species than originally thought, which when combined with low H. halys numbers overall that summer, may have reduced the ability of T. japonicus to establish successfully.

Abstract subject to change over the 2020 field season.