Golf Course Management

MAR 2017

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 88 of 125

03.17 GOLF COURSE MANAGEMENT 71 the average number of turf areas (for example, number of tees) that experienced damage in a year. The average course experienced damage to 6.6 fairways, 5.7 tee boxes and 6.4 greens/ collars (Table 2). A survey of GCSAA mem - bers (3) estimated that an 18-hole golf course consists of 30 acres (12.1 hectares) of fairways, 3 acres (1.2 hectares) of tees, and 1.06 acres (0.43 hectare) of greens/collars. Using these figures as a base, we estimated that, on aver - age, 10.8 acres (4.4 hectares) of fairway, 0.95 acre (0.38 hectare) of tees, and 1.06 acres of greens/collars, for a total of ~12.8 acres (~5.2 hectares) require protection on an 18-hole golf course. Damage by turf area Annual bluegrass weevil damage was re - ported to occur in all turf areas, including areas where turfgrass managers rarely report damage to university personnel (for example, greens and roughs). Damage was most com - mon on fairways (69%) and collars/aprons (58%) (Table 2). Only 10% of respondents reported damage to roughs. The incidence of damage to putting greens (26%) was unexpectedly high given the low mowing heights reported across the region and the traditionally high intensity of insecti - cide use in these areas. Average putting green mowing height in the region varied little, ranging from 0.109 inch (2.77 mm) in west - ern Pennsylvania to 0.126 inch (3.20 mm) in the northern peripheral states and provinces. Two thirds (66%) of the courses that reported annual bluegrass weevil damage to greens had heights of cut greater than the average, which was 0.119 inch (3.02 mm) across all survey re - sponses (Figure 2). Regions with the highest incidence of damage to putting greens included Con - necticut (40%), northern peripheral states and provinces (38%), and New Jersey (31%) (Table 2). The average height of cut on put - ting greens in these areas (0.120 to 0.126 inch [3.05 to 3.20 mm]) was greater than the sur - vey average. The lowest incidence of annual bluegrass weevil damage to greens was re - ported on Long Island (11%) and in western Pennsylvania (16%), which were also the two regions with the lowest average height of cut for greens (0.110 and 0.109 inch [2.79 and 2.77 mm], respectively). 0 10 20 30 40 50 60 70 0 5 10 15 20 25 30 A B % with damage to putting greens % courses < 2.54 mm 2.56 – 2.79 mm 2.82 – 3.05 mm 3.07 – 3.3 mm 3.33 – 3.56 mm 3.58 – 3.81 mm 3.84 – 4.06 mm Putting green height and greens damage Figure 2. The percentage of surveyed golf courses categorized by putting green mowing height (A), and those that expe- rienced Listronotus maculicollis (annual bluegrass weevil) damage to putting surfaces (B) by mowing height treatment.

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