Tuesday, November 6, 2007 - 4:00 PM
168-12

Effects of Trinexapac-ethyl Applications and Cultivation on the Divot Resistance of Kentucky Bluegrass Cultivars.

Thomas Serensits1, Andrew McNitt2, and James Brosnan2. (1) Ag Science & Industry Bldg, Penn State Crop & Soil Science Dept, 116 Ag Sciences & Industry Building, University Park, PA 16802-3504, (2) 116 Ag Sciences & industry Building, Pennsylvania State Univ., Penn State University, Department of Crop and Soil Science, University Park, PA 16802-3504

A divot on an athletic field can be described as a piece of turf partially or completely gouged out of surrounding turf by studded footwear. Few studies have evaluated divot resistance on athletic fields. Divoting often results in poor footing which can compromise the playability and safety of the playing surface. Trinexapac-ethyl (TE) has been found to increase tiller density and affect rooting of Kentucky bluegrass (Poa pratensis L.). These effects may increase the divot resistance of a turfgrass sward. In 2006, a study was conducted to evaluate the effects of multiple TE applications and springtime cultivation on the divot size of nine Kentucky bluegrass cultivars grown on a sand-based rootzone under various levels of simulated traffic. Various TE treatment regimes were evaluated. Traffic was applied using a Brinkman Traffic Simulator. Divots were created following the final traffic application using the PENNSWING device. Divot length was used to indicate differences in divot resistance. Both TE treatments significantly reduced divot length compared to the control. Divot length for plots receiving cultivation was not significantly different from the control.