Todd from Chicago, Il writes
Most insecticides containing the active ingredient Quinclorac, such as Q4 Plus Herbicide, will have similar labeling to allow the clippings from the first 3 mowings after application to remain on the turf. Since quinclorac stays active for many weeks and needs as much contact time on the target plants as possible, this helps to get the most effect from your sprays. Basically, we do not want to cut the grass and remove the product that we've just applied before it has had time to kill the target weeds. Another reason to allow clippings to remain is so that they are not mulched too quickly, potentially causing damage to desirable plants while the quinclorac may still be active enough to damage susceptible plants.
Answer last updated on: 09/19/2016
