Golf Course Management

FEB 2018

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

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Page 92 of 119

02.18 GOLF COURSE MANAGEMENT 79 the same time is a challenge, especially when anthracnose is a constant threat. Not surpris - ingly, anthracnose is more severe at lower cut- ting heights (2,29). Fortunately, other prac- tices that improve playability (green speed) such as double-cutting and lightweight rolling (15,26) do not increase — and, in some cases, can slightly decrease — the severity of this dis - ease (15). Similarly, additional traffic along the perimeter of putting greens associated with a change in direction of rolling equipment and clean-up mowing has not increased anthrac - nose (26), again showing that anthracnose is not a wound-related disease. Thus, an effective approach to improv - ing anthracnose management is to identify a combination of lightweight rolling and/or double-cutting that provides the desired play - ability (green speed) at the highest-feasible cutting height. Irrigation Both excessively wet and dry soil condi- tions can intensify anthracnose (24,29,30,31). Admittedly, some drying of the turf and root zone is necessary to produce firm and fast playing conditions. However, the ability to anticipate and prevent wilt stress on putting Top: Putting greens that received liming (calcium carbonate) treatments to adjust the root-zone pH to levels between 6.0 and 6.5 had less anthracnose. Photo by James Murphy Bottom: Mowing height treatments were applied before fungicide rate applications. Photo by James Hempfling

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