Tom from Tustin, Ca writes
If the Marathon turgrass you have is a Tall Fescue seed blend then yes, Quinclorac 75 DF Herbicide would be safe to apply as Tall Fescue is a tolerant turfgrass per the product label. For spot treatment of weeds, it is recommended to use a MSO surfactant for better adhesion and faster burndown of weeds.
Answer last updated on: 02/09/2021