Golf Course Management

OCT 2013

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

Issue link: http://gcmdigital.gcsaa.org/i/178551

Contents of this Issue

Navigation

Page 101 of 129

cutting edge Research in progress fairways but is tolerant of few post-emergence herbicides. Newer herbicides have lower environmental impact and can be used at low rates, but few are safe on creeping bentgrass. Six of these newer herbicides were evaluated for their potential to be safened on creeping bentgrass. In a greenhouse study, safeners were applied at application or three days before. The herbicides topramezone and amicarbazone showed potential to be safened. In additional experiments, the herbicides topramezone, amicarbazone and pinoxaden were tested to determine which safenerherbicide combinations were most effective. The results indicate that data are needed regarding effcacy of safener-herbicide combinations in the feld. — James Brosnan, Ph.D. (jbrosnan@utk.edu), and Matthew Elmore, University of Tennessee–Knoxville Photo by D. Pinnix Turfgrass colorant evaluation The research described in these summaries is funded in part by USGA. A product evaluation was initiated at North Carolina State University's turfgrass research facility in November 2011 to monitor the longevity and quality of color for a number of turf colorants on the market. Products were applied on an ultradwarf bermudagrass putting green and on bermudagrass mowed to fairway height at 80 and 120 gallons/acre following recommended label dilution rates. The collected data include visual quality and percent coverage ratings, and digital analysis to document changes in color over time. In year 1, single applications of colorants were made in November and monitored through March. Some products did not go into solution as easily as others, which could lead to clogging, inadequate spray coverage and increased labor time. Initial color varied greatly from dark green to blue or lime green. Over time, colors shifted to gray or blue. Other testing for viscosity, tendency to rub off and timing of sequential applications will also be completed at the end of the study in 2013. — Grady Miller, Ph.D. (grady_miller@ncsu.edu), and Drew Pinnix, North Carolina State University Photo by Y. Qian Golf courses' carbon footprint As part of an effort to assess the golf course carbon footprint, researchers at Colorado State and the USDA-ARS are measuring N2O fux on fairways, roughs, native areas and greens at Harmony Golf Club in Fort Collins, Colo., and evaluating the impact of different types of fertilizers on trace gas fuxes. Fifty-six vented chambers were installed on the various areas of the course, and gas samples were collected from inside the chambers. Measurements were taken once a week throughout the growing season and twice monthly in winter. Soil sensors measured soil water content and soil temperature. To evaluate the effects of fertilizers, vented chambers were installed on plots on a fairway and a rough that received three fertilizer treatments and a control. Current results show that soil water and content and soil temperature play a large role in N2O emissions. N2O emissions were greatest from the fairway site. Polyon fertilizer had the lowest N2O emissions. — Katrina Gillette (Katrina.Gillette@ars.usda.gov) and Yaling Qian, Ph.D., Colorado State University; Roland Follett, Ph.D., USDA-ARS, Fort Collins, Colo. Photo by M. Elmore Teresa Carson Weed management for creeping bentgrass fairways Creeping bentgrass is widely used on golf course 96 GCM October 2013 GCM Teresa Carson (tcarson@gcsaa.org) is GCM's science editor.

Articles in this issue

Links on this page

Archives of this issue

view archives of Golf Course Management - OCT 2013