Colorado requires professional applicators to flag any urban pesticide application, no matter what type or how small. So in public green spaces, recent flags are your cue for caution. But because ...

You see them everywhere this time of year—little yellow flags emblazoned with a circle and a line through a couple of stick-figure children. “Pesticide Application,” they warn, “Please ...

The state, under a legislative agreement reached Monday, would become the first to require homeowners to post warning flags to alert neighbors when they use pesticides on their lawns. The measure ...

Besides, pesticide applicators such as crop dusters are still required to abide by a “do not contact” provision that prohibits spraying pesticides in a way that may expose people.