Skip to Main Content
Effects of diterpene acids on components of a conifer bark beetle–fungal interaction: tolerance by Ips pini and sensitivity by its associate Ophiostoma ipsAuthor(s): Brian J. Kopper; Barbara L. Illman; Philip J. Kersten; Kier D. Klepzig; Kenneth F. Raffa
Source: Environ. Entomology 34(2): 486-493 (2005)
Publication Series: Miscellaneous Publication
PDF: Download Publication (515 KB)
DescriptionConifer resin and phloem tissue contain several phytochemical groups,composed primarily of monoterpenes,diterpene acids, and stilbene phenolics. The effects of monoterpenes and phenolics on stem-colonizing bark beetles and their associated microorganisms have been studied to some extent, but the roles of diterpene acids are largely unknown. Diterpene acids are known to have substantial feeding deterrent and growth inhibiting effects on a variety of insect groups and are known to inhibit a variety of fungi.We tested three diterpene acids present in red pine, Pinus resinosa at various concentrations,on several life history components of the bark beetle Ips pini and the fungus Ophiostoma ips No diterpene acid affected the host acceptance behavior or larval survival of Ips pini In contrast, abietic acid and isopimaric acid strongly inhibited spore germination of O. ips and abietic acid strongly inhibited mycelial growth. The levels of inhibition observed were higher than with any previous assays of monoterpenes or phenolics in this system. These results support the view that conifer defenses against bark beetle fungal complexes are multifaceted, with all three phytochemical groups being important to P. resinosa, but each with varying relative activity against the beetles and fungi.
- You may send email to firstname.lastname@example.org 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.
CitationKopper, Brian J.; Illman, Barbara L.; Kersten, Philip J.; Klepzig, Kier D.; Raffa, Kenneth F. 2005. Effects of diterpene acids on components of a conifer bark beetle–fungal interaction: tolerance by Ips pini and sensitivity by its associate Ophiostoma ips. Environ. Entomology 34(2): 486-493 (2005)
Keywordshost defense, conifer, diterpene acids, bark beetles, Ips Ophiostoma
- Effects of diterpene acids on components of a conifer bark beetle-fungal interaction : tolerance by Ips pini and sensitivity by its associate Ophiostoma ips
- Contrasting Patterns of Diterpene Acid Induction by Red Pine and White Spruce to Simulated Bark Beetle Attack, and Interspecific Differences in Sensitivity Among Fungal Associates
- 1-Octen-3-ol is repellent to Ips pini (Coleoptera: Curculionidae: Scolytinae) in the midwestern United States
XML: View XML