Glyphosate resistant weeds spreading geographically in U.S., with multiple species now resistant on an increasing number of farms

[Emily]

http://www.stratusresearch.com/blog07.htm

January 25, 2013

Glyphosate Resistant Weeds ? Intensifying

Kent Fraserby Kent Fraser

Not only are glyphosate resistant weeds spreading geographically, the problem is also intensifying with multiple species now resistant on an increasing number of farms.

US farmers told us that 61.2 million acres of cropland are infested with glyphosate resistant weeds, almost doubling since 2010.

Stratus has asked thousands of US farmers about resistance, with surveys across 31 states over three years. The trends are dramatic:...

 

[Emily]

Re: Glyphosate resistant weeds spreading geographically in U.S., with multiple species now resistant on an increasing number of farms

http://www.indystar.com/article/20130713/NEWS/307130031/Herbicide-resistant-weed-spreading-fast-Indiana-threat-potential-train-wreck

Herbicide-resistant weed spreading fast in Indiana; threat a potential 'train wreck'
Palmer amaranth is prolific, Roundup-resistant and knocking on Central Indiana's door
Jul. 13, 2013
[snip]
Controlling the weed requires an expensive cocktail of three or four herbicides at a cost of $50 to $60 an acre, compared to $15 to $20 an acre for less resistant weeds, Johnson said....