First Report of Halyomorpha halys (Hemiptera: Pentatomidae) in Montana, USA

Amy C. Morey, Lauren M. Kerzicnik, Frank E. Etzler, Katrina Mendrey, Bruce D. Morey, Zachariah Miller

Research output: Contribution to journalArticlepeer-review


Here, we document the first record for Montana of Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), a major agricultural and nuisance pest in many parts of the world. The insect was found overwintering in a private residence in January 2021 in Billings (Yellowstone Co.). A preliminary survey of sites in Billings from May to October 2021 confirmed the presence of H. halys within a radius of at least 11 km from the January detection. Putatively overwintering H. halys and adult bugs found across the city of Billings in the summer suggest the insect may have been present in the area prior to 2021. Surveys conducted in various regions of the state between 2013 and 2020 reported no detections of H. halys. Yellowstone Co. was previously surveyed in 2017, indicating the species likely arrived between 2018 and 2020 or was present before 2018 at densities too low to be detected. The summary of presence and absence records we provide herein is valuable for future monitoring and management efforts of this economically important species.

Original languageEnglish (US)
Article number27
JournalJournal of Integrated Pest Management
Issue number1
StatePublished - 2022

Bibliographical note

Publisher Copyright:
© 2022 The Author(s). Published by Oxford University Press on behalf of Entomological Society of America.


  • brown marmorated stink bug
  • early detection
  • invasive species
  • pheromone lure


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