Postemergence Polygonum aviculare control in Cynodon dactylon turf
2022
Askew, Whitnee L. B. | Willis, John B. | Beam, Josh B. | Venner, Katelyn A. | Gonçalves, Clebson G. | Askew, Shawn D.
Peer‐reviewed research is not available to explain Polygonum aviculare L. (prostrate knotweed) control in Cynodon dactylon (bermudagrass) turf, yet P. aviculare is common and troublesome in managed C. dactylon turf. Six experiments were conducted to determine control options for P. aviculare in C. dactylon golf roughs managed in Hanover, VA. Studies evaluated hormone, photosystem, and ALS inhibiting herbicides. Among a group of eighteen herbicide treatments, only six controlled P. aviculare over 80% and these included single products or mixtures containing 2,4‐D, dicamba, metsulfuron, or chlorsulfuron. Imazaquin, quinclorac, and triclopyr caused transient C. dactylon injury. Treatments dependent on bromoxynil, triclopyr, clopyralid, quinclorac, metribuzin, rimsulfuron, imazaquin, foramsulfuron, flazasulfuron, trifloxysulfuron sodium, or sulfosulfuron are unlikely to adequately control P. aviculare in C. dactylon turf.
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