I don't think kochia is that hard to get rid of if you keep after it for a couple years. Seed doesn't remain viable for much over two years so if a guy is vigilant with tillage it's no big deal. It is a neighborhood deal though because of how effective the wind is at moving seeds. What you're seeing in this particular field is the result of being bordered on both the west and north sides by a farmer who grows peas & canola and doesn't use tillage for weed control. He has a very nice crop of canola this year but it is really starting to look ugly with the kochia escapes poking their heads up.
I used Trump Card for my wheat tank mix this year and the touch of Starane in the product is very effective on kochia but I am only going to use it in crop and will sure never consider it for chem fallow. It's about the only thing we have left because Dicamba and the SUs no longer do much.