[APWG] NEWS: Farmers Switch Course in Battle Against Weeds

[Alan.V.Tasker at aphis.usda.gov]

Not really unexpected.  If you apply a selection pressure, you select for a
trait. We also have atrazine resistant weeds, ALS inhibitor resistant weeds
....
Nor is this gene flow, necessarily, as some might claim.

Some weeds may have a natural population with a resistance trait for which
selection is occurring.  Or the entire species (Commelina benghalensis) may
be naturally resistant to begin with.


Alan V. Tasker, Ph.D.
National Noxious Weed Program Manager

USDA  Animal & Plant Health Inspection Service
Plant Protection & Quarantine
Emergency and Domestic Programs
Invasive Species & Pest Management

       (301) 734-5708
Fax (301) 734-8584



                                                                                                                                                   
                      Olivia Kwong                                                                                                                 
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                      08/20/2007 08:55 AM                                                                                                          
                                                                                                                                                   
                                                                                                                                                   




I'm not sure if the resistant weeds include any exotic invasives, but it's
something to keep a watch on since glyphosate is used as an invasive
control technique.

-----------------------------------

http://www.npr.org/templates/story/story.php?storyId=13743461

Farmers Switch Course in Battle Against Weeds
by Dan Charles

Morning Edition, August 20, 2007  In the age-old struggle between farmers
and weeds, farmers have enjoyed the weed killer Roundup. Some have called
it the herbicide of a lifetime. But after 30 years on the market the
chemical seems to be losing its power over some weeds, changing farming
practices nationwide.

See the link above to listen to the story.


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