For Monsanto deliberately and slowly to destroy the usefulness of glyphosate after the patent runs out and force customers (and with them the US taxpayers who enforced their patent monopoly for 34 years) then to buy their hot new and far more expensive patented alternative herbicides (which is what I have always thought Monsanto was doing with "RoundUp Ready") is, IMO, an eventual cause for class action compensation.
Interesting case before the Supreme Court last week. A 70 year old farmer in Sanborn, IN went to his local feed store and bought bags of soybeans that had been bagged for feed. He planted them as a double crop after his winter wheat and gambled on the fact that the RoundUp Ready genes were passed on. He seeded and treated with ROundUp and sure enough, the beans grew weed free. Monsanto sued him for patent violation. Very interesting case. (Vernon Hugh Bowman v. Monsanto Co.)
The thing that struck me is that genetically modified plants and seeds are getting loose in the environment. It is bound to have unpredictable side effects as you have pointed out with your posts here. In theory, an unanticipated mutation or cross pollination could leave us without a species of food crop.
True, if you have planted Roundup ready corn and follow it with Roundup ready cotton then the corn that comes up in the cotton can’t be killed with Roundup. It is a pain and you have to spray with Fusilade or some other product.
We’ve only grown corn once but we just cultivated and the corn shaded out the cotton that was left.
Around here a lot of farmers aren’t planting the 10% refuge acres and the insects may become immune and if you don’t use a high enough rate of roundup and kill all the weeds those that survive will be roundup resistant.