Signup to receive email updates
- Emerald Ash Borer Life Cycle
- EAB Life Cycle and Damage Images
- EAB Symptoms
- EAB Ash Crown Dieback Progression Images
- Distinguishing EAB from Native Borers
- EAB Look-Alike Insects
- Emerald Ash Borer Diagnostic Check-off List
- How to Identify an Ash Tree
- Ash Tree Identification Guide
- Other Ash Tree Problems
- Illinois Certified Arborists
- City of Chicago Tree Planting Program
- Emerald Ash Borer Locations in U.S.
- Emerald Ash Borer Locations in Illinois
- City of Chicago EAB Links Page
- Morton Arboretum: EAB Information
- Illinois EAB Newsletters
- Illinois EAB Purple Trap Flyer
- Purple Trap Radio PSA
- Emerald Ash Borer Timeline in Illinois
- Illinois EAB Community Action Plan
- Multistate Emerald Ash Borer Information
- Emerald Ash Borer in Illinois
- Emerald Ash Borer in Indiana
- Emerald Ash Borer in Maryland
- Emerald Ash Borer in Michigan
- Emerald Ash Borer in Ohio
- Emerald Ash Borer in Pennsylvania
- Emerald Ash Borer in Wisconsin
- Emerald Ash Borer in Canada
- USDA Forest Service Emerald Ash Borer Information
- USDA EAB Pest Alert
- Spanish USDA EAB Pest Alert
- USDA Emerald Ash Borer
- USDA: EAB Public Service Announcement
- Green Menace: Emerald Ash Borer Video
- EAB Poster
- Arrest That Pest: EAB Curriculum Guide for Youth
- Emerald Ash Borer Education Kit
- June 2011 (6)
- December 2010 (1)
- November 2010 (2)
- September 2010 (1)
- April 2010 (5)
- March 2010 (2)
- December 2009 (1)
- January 2009 (1)
- November 2008 (6)
- October 2008 (1)
- August 2008 (2)
- July 2008 (10)
- June 2008 (12)
- May 2008 (2)
- April 2008 (1)
- January 2008 (5)
- November 2007 (1)
- July 2007 (5)
- June 2007 (4)
- May 2007 (3)
- March 2007 (1)
- January 2007 (3)
- November 2006 (3)
- October 2006 (1)
- September 2006 (3)
- August 2006 (3)
- July 2006 (3)
- June 2006 (1)
89 Total Posts
follow our RSS feed
Sunday, June 10, 2007
Beauveria bassiana, a soilborne fungus already used for keeping many insect pests in check, is being eyed as a possible control for an invasive beetle that has already killed more than 20 million ash trees in Michigan, Ohio, Indiana, and Ontario.
Agricultural Research Service (ARS) entomologist John Vandenberg and colleagues want to know how well a commercial strain of B. bassiana stands up to the emerald ash borer after repeated applications. They are also seeing if this strain–called GHA–will work better if used with the commercial insecticide imidacloprid.
B. bassiana spores kill insects by attaching to them, germinating, and penetrating their hosts' bodies. The spores can survive to infect later pest generations. B. bassiana is used against a variety of insects, including termites and whiteflies.
The emerald ash borer is thought to have entered North America during the 1990s in solid woodpacking material from Asia. Its immature larvae feed on the vascular-system tissue of ash trees.
First spotted here in 2002 near Detroit, the destructive beetle has since cost municipalities, property owners, nursery operators and forest products industries tens of millions of dollars, according to the U.S. Forest Service (USFS). Infestations were recently found in the Chicago area.
According to Vandenberg, of the ARS Plant Protection Research Unit (PPRU), Ithaca, N.Y., preliminary studies led by USFS scientist Leah Bauer have shown that the beetle is susceptible to B. bassiana. However, the fungus' effectiveness in larger field trials has not yet been proven.
At a commercial tree nursery near Jackson, Mich., Vandenberg, Bauer, PPRU entomologist Michael Griggs, Cornell University scientist Louela Castrillo and Michigan State University researcher Houping Liu are studying the performance of the fungus on about 400 ash trees in three planting areas.
A possible strategy against the beetle would entail spraying the fungus on trees before the pests' spring mating season, according to Vandenberg.
ARS and the U.S. Forest Service are agencies within the U.S. Department of Agriculture. ARS is USDA's chief in-house scientific research agency.