Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub


    The small southern pine engraver, Ips avulsus Eichhoff (Coleoptera: Scolytidae), is one member of a guild of southern pine bark beetles that causes millions of dollars of losses to southern U.S. pine forests annually.  Our objective was to determine the impact of a commercial preparation of the entomopathogenic fungus Beauveria bassiana (Balsamo-Crivelli)  Vuillemin (Ascomycota:  Hypocreales) in protecting pine host plant tissue from colonization and damage by I. avulsus and on the B. bassiana–induced mortality of I. avulsus adults during the first 2 wk of host attack. The field trials were conducted in the Kisatchie National Forest (Rapides Parish, LA) using a small-bolt technique. Results showed that the I. avulsus adults successfully colonized both the B. bassiana–treated bolts and the control bolts within the first week of field exposure.  Although the formulation did not protect  bolts from attack, it caused significantly higher mortality of I. avulsus adults in B. bassiana–treated bolts than in the control, and  significantly reduced the number of adults that reemerged. Approximately 84% of I. avulsus adults found in the B. bassiana–treated bolts died from B. bassiana infection and never reemerged, compared to 14% in the control bolts.  Although effects from B. bassiana were too late to stop I. avulsus from entering host bolts, the high rates of beetle mortality observed under the bark suggest potential utility of the formulation for managing pine bark beetles. Successful application strategies and tactics are unknown at this point and will depend on many factors, including deployment techniques.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Olatinwo, R.; Walters, S.; Strom, B. 2018. Impact of Beauveria bassiana (Ascomycota: Hypocreales) on the small southern pine engraver (Coleoptera: Scolytidae) in a loblolly pine bolt assay . Journal of Entomological Science. 53(2): 180-191. 12 p.


    Google Scholar


    bark beetles, biopesticide, forest pest, mycosis, Pinus, Scolytinae

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page