People have to use chemical weed controls responsibly.  There are resistant 
biotypes to probably every herbicide mode of action, not just Glyphosate. 
Until it is realized that you cannot use the same mode of action year after 
year we are going to increasingly see resistant species.  I have seen at 
least one case of Kochia becoming resistant to two different modes of action 
simultaneously.
We have seen mites become resistant to controls for the same reasons.  We 
have to rotate our controls.  Or better yet use two different modes of 
action together.
Dave
South East Idaho

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