According to a March 6 article in Delta Farm Press, the numbers of recorded glyphosate-resistant instances can be misleading.  There are 20 cases of reported glyphosate resistance so far, which when compared to the numbers of resistance reported for ACCase-inhibitors, triazines and ALS-inhibitors looks like a low number at first glance.

However, glyphosate-tolerant systems have been available for only about a decade, whereas ALS-inhibitors have been out two decades and the triazines have been out for five decades.  These numbers pose the question of where glyphosate will be 10 years from now. 

Glyphosate resistance was first reported in 1996 in Australia, and since then 12 weed species have developed resistance. Seven weeds have been confirmed in the united States, of which 2/3 were reported in the last three years.  According to university reports and weedscience.org, resistance in the U.S. has been reported in 16 states since 1998.

On a scale of 1-10 (1 being the least concerned and 10 being the most), how concerned are you about glyphosate resistance and why?