re: #8 EiMitch
Yes, Obdi is wrong about that, and I suppose my language was less than precise as to the “Round Up Ready” weeds.
Yes, they had to have a gene to put into the crops, but it is currently very rare in nature. Increasing the amount of indiscriminate Round Up use will speed up the process of resistance and render Round Up useless far sooner than would otherwise happen. Sort of like using antibiotics for everything, all the time.