Prime Source's Quinclorac 75 DF Select is a selective, post-emergent herbicide that can be safely applied to many types of turf to control a variety of broadleaf and grassy weeds. This crabgrass killer herbicide can be applied to both residential and non-residential turf ...Prime Source's Quinclorac 75 DF Select is a selective, post-emergent herbicide that can be safely applied to many types of turf to control a variety of broadleaf and grassy weeds. This crabgrass killer herbicide can be applied to both residential and non-residential turf.
Quinclorac 75 DF Select can be applied from seven days prior to seeding and up to twenty eight days after selected weeds have emerged. The use of a methylated seed oil, such as Duo Stick Select is recommended to greatly enhance the effectiveness of the product.