Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern
Help
 

GeoTreesearch


Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

(515 KB bytes)

Title: Effects of diterpene acids on components of a conifer bark beetle–fungal interaction: tolerance by Ips pini and sensitivity by its associate Ophiostoma ips

Author: Kopper, Brian J.; Illman, Barbara L.; Kersten, Philip J.; Klepzig, Kier D.; Raffa, Kenneth F.

Date: 2005

Source: Environ. Entomology 34(2): 486-493 (2005)

Publication Series: Not categorized

Description: Conifer 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.

Keywords: host defense, conifer, diterpene acids, bark beetles, Ips Ophiostoma

Publication Notes:

  • 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.

XML: View XML

Citation:


Kopper, 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)

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.