Actually you just made his point.
They are increasing the amount of glyphosate AND adding other toxins because the weeds are becoming more resistant to glyphosate.
Sorry, but you're wrong.
My premise is that GMO's are NOT harmful.
Frenchfry's premise is that GMO's ARE harmful.
The statement you quoted merely says that farmers are occasionally increasing the amount of glyphosate, or using other chemicals to do the job, as some weeds become more resistant to glyphosate. This is true. But this is NOT proof that GMO's are harmful. It simply means that the GMO's may need to be modified to use different chemicals (Liberty Link soybeans, for example).
The fact that farmers HAVE GMO's in their list of options means they aren't FORCED to use the older, more harmful chemicals. Glyphosate is very safe, by comparison to many other herbicides.
So, how many years have you been farming? I'm just curious where you got this vast knowledge base regarding herbicide use.