Emergence and Growth of Tall Fescue Seedlings after Postemergence Broadleaf Herbicide Application

Effective weed control prior to seeding is essential for proper turfgrass establishment since competition from weeds can cause sward fail. Herbicides with multiple active ingredients different chemical families could increase efficacy, but hinder the of newly seeded turf. Research trials were initiated in fall 2020 Olathe and Manhattan, KS, determine if tall fescue (Schedonorus arundinaceus) be earlier after application than stated on herbicide labels. Overall, this study demonstrated that between 0 14 days an carfentrazone-ethyl + MCPP 2,4-D dicamba (SpeedZone), fluroxypyr halauxifen-methyl Choline (GameOn); or triclopyr pyraflufen-ethyl (4-Speed XT) had little no effect growth under conditions evaluated these experiments. In general, manufacturers must consider altering label reseeding intervals before using results reported herein as guidelines.