Decisive and coordinated action on the part of farmers, homeowners, municipalities, counties, rights-of-way managers, and weed and pest districts is necessary to prevent further spread.
If glyphosate-resistance in suspected, prevent seed and pollen spread by any means necessary. Zero-tolerance for suspected resistant kochia populations is the goal.
UW Extension and Washakie County Weed and Pest developed two fact sheets on the topic that include herbicide recommendations.
You can download the bulletins here:
International Survey of Herbicide Resistant Weeds
Herbicide Resistant Weeds and Their Management - Pacific Northwest Extension Bulletin
Facts about Glyphosate Resistance - Purdue Extension Bulletin
Herbicide Resistant Weeds - University of Minnesota Extension website
Understanding Herbicide Mode of Action - Oklahoma State University Extension Bulletin
Control Freaks blog - a project of University of Wyoming faculty Andrew Kniss and Brian Mealor
If you suspect herbicide resistance please contact your UW Extension Educator as soon as possible. They can help you verify resistance and determine the best course of action.