Funny, the issue is loss of forage for livestock instead of wildlife.
Idaho weed researchers say fungus could fight knapweed
The Associated Press
Wednesday, December 27, 2006
MOSCOW, Idaho -- A University of Idaho researcher is hoping to harness the power of tiny fungi to combat an invasive weed that ranchers blame for crowding out nutritious forage for their livestock.
George Newcombe is busy inside a greenhouse on the school's Moscow campus working with so-called endophytes that live in spotted knapweed, considered one of the West's most-destructive noxious weeds.
Endophytes are found in many plant species and have recently won additional scientific scrutiny. Newcombe says endophytes survive off the host and are believed to boost the plant's survival in exchange for nutrients they provide.
Now, Newcombe says he appears to have been able to isolate an endophyte that renders knapweed sterile. The fungus typically exists in low concentrations, but when it's cultured in a lab and sprayed in higher concentrations, it has a deadly effect.
"They may be the key," Newcombe told the Spokesman-Review newspaper during an interview in the greenhouse of the university's Center for Research on Invasive Species and Small Populations. He's planning field trials soon.
Historical records show the spotted knapweed came from Eastern Europe and Asia into North America about a century ago when it arrived in contaminated crop seed, according to the U.S. Department of Agriculture. With few natural enemies, the perennial with pink to light purple flowers spread across the continent.
It releases a toxin into the soil that can stunt plants that cattle eat. As a result, heavily infested areas often must be reseeded once the spotted knapweed has been eradicated.
As more and more of the West's isolated areas are filled up by the region's burgeoning population, knapweed continues to spread, often along highways, train tracks, power lines and other areas newly being touched by human disturbance.
Idaho weed researchers say fungus could fight knapweed
The Associated Press
Wednesday, December 27, 2006
MOSCOW, Idaho -- A University of Idaho researcher is hoping to harness the power of tiny fungi to combat an invasive weed that ranchers blame for crowding out nutritious forage for their livestock.
George Newcombe is busy inside a greenhouse on the school's Moscow campus working with so-called endophytes that live in spotted knapweed, considered one of the West's most-destructive noxious weeds.
Endophytes are found in many plant species and have recently won additional scientific scrutiny. Newcombe says endophytes survive off the host and are believed to boost the plant's survival in exchange for nutrients they provide.
Now, Newcombe says he appears to have been able to isolate an endophyte that renders knapweed sterile. The fungus typically exists in low concentrations, but when it's cultured in a lab and sprayed in higher concentrations, it has a deadly effect.
"They may be the key," Newcombe told the Spokesman-Review newspaper during an interview in the greenhouse of the university's Center for Research on Invasive Species and Small Populations. He's planning field trials soon.
Historical records show the spotted knapweed came from Eastern Europe and Asia into North America about a century ago when it arrived in contaminated crop seed, according to the U.S. Department of Agriculture. With few natural enemies, the perennial with pink to light purple flowers spread across the continent.
It releases a toxin into the soil that can stunt plants that cattle eat. As a result, heavily infested areas often must be reseeded once the spotted knapweed has been eradicated.
As more and more of the West's isolated areas are filled up by the region's burgeoning population, knapweed continues to spread, often along highways, train tracks, power lines and other areas newly being touched by human disturbance.