Scolytinae in Nursery and Fruit Crops of Western Kentucky and Seasonal Population Patterns of Four Invasive Ambrosia Beetles

Zenaida Viloria, Raul T. Villanueva, Ric Bessin, Paul O'Neal, Christopher M. Ranger, Winston Dunwell

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) inoculate species specific symbiotic fungi into the sapwood of their hosts. Some fungi are innocuous, but others are pathogenic and can kill plants in a short time. The main objectives of this study were to identify ambrosia beetle species found in wholesale and retail nurseries and an apple orchard in western Kentucky and monitor population abundance and phenology of the more common invasive ambrosia beetles. Baker traps baited with ultra-high or standard release ethanol were deployed in late February or March and removed in either fall (2016 and 2017) or August (2018). Sixteen ambrosia beetle species were captured, and eight of them were invasive. The invasive species Cnestus mutilatus (Blandford), Xylosandrus crassiusculus (Motschulsky), Xylosandrus germanus (Blandford), and Xyleborinus saxesenii (Ratzeburg) were the most common and abundant species. The highest counts of these invasive species were recorded from April to May. In addition, we are reporting 13 bark beetle species captured in this study; among them, Phloeotribus dentrifrons (Blackman) and Thysanoes fimbricornis LeConte are reported for the first time for Kentucky, whereas Scolytus multistriatus (Marsham) was the only invasive bark beetle collected.

Original languageEnglish
Pages (from-to)374-386
Number of pages13
JournalJournal of Entomological Science
Issue number3
StatePublished - Jul 1 2021

Bibliographical note

Funding Information:
This research was supported with funds provided by the Specialty Crop Block Grants from the Kentucky Department of Agriculture. The authors appreciate the support of several nursery farmers in Kentucky for allowing them to conduct these studies on their farms. The authors thank Ms. Jenny Barnett (USDA, Wooster, OH) and Dr. Robert Rabaglia (USDA, Washington, DC) for identifying the ambrosia and bark beetle collection, Dr. John Obrycki for reviewing a previous version of this publication, and Mrs. Virginia Travis for technical support to complete this study.

Publisher Copyright:
© 2021 Georgia Entomological Society Inc.. All rights reserved.


  • Baker traps
  • ethanol trapping
  • nursery crops
  • seasonal population

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Agronomy and Crop Science
  • Insect Science


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