Moss Control in Creeping Bentgrass Putting Greens

Moss (Bryum argenteum) continues to become one of the most problematic weeds in creeping bentgrass (Agrostis palustris) putting greens. Control of moss can be approached in many different ways, including chemical applications, and cultural practices such as correcting shading or poor drainage. A study was conducted at Springdale Country Club (Springdale, Ark.) to evaluate the effectiveness of several different chemical products for the control of moss in a creeping bentgrass putting green. Daconil Zn®, Junction®, Fore®, Zerotol®, ferrous ammonium sulfate, Dawn Ultra®, and DeMoss® were applied every 14 days beginning in early June 2002 for a period of eight weeks. Visual moss control ratings were taken prior to the third application and then every 14 days. Excellent moss control was observed in plots treated with Daconil Zn® and this control was consistent for the remainder of the evaluation period. Limited moss control was observed in plots treated with Junction®, Fore®, and Zerotol®. There was no control of moss using Dawn Ultra®, DeMoss®, or ferrous ammonium sulfate.