Weed resistance is nothing new. Weeds just like humans and animals (vaccines) will become resistant over time to any product that is over used.
But I use the words "over used" carefully.
We over use vaccines, pesticides and many other things because they work great. If there was something better then we wouldnt over use the same products.
Why did we use so much Roundup from 1995-present? Because it was the best product and the only product to get great weed control.
Guess what? Now it isn't working. BUT...we now have the newer Liberty technology that doesn't have one resistant weed.
After it is used for 10-15 yrs it may get some resitance but there is already new technology coming on next year for 2-4,D and Dicamba crops.
We will always have some resistance and their are things we can do to SLOW IT DOWN...but not keep it from happening.
Best way is to switch chemisty as much as possible and use a letal dose.
With the ag side using more 2-4,D and Dicamba on post spraying crops in the future....you may want to buy up as much 3-Way as you can afford. It is going to become a supply and demand game and lawncare is going to pay a lot more for these AI's.
We already have all of 2014 bought and part of 2015.
Putting your money in these products will get you a better return then the stock market