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Thursday, November 5, 2009: 8:15 AM
Convention Center, Room 403-404, Fourth Floor
Abstract:
Research objectives included evaluating: (1) best establishment techniques when interseeding 'T-1' or 'Alpha' creeping bentgrass into a predominant Poa annua putting green and (2) best seeding rates when interseeding T-1 or Alpha creeping bentgrass into fairways.
Establishment technique studies were conducted at Downriver and Esmeralda Golf Courses located in Spokane, WA. Treatments included spiking, aerifying, vertical mowing, no surface disruption, and an unseeded control. T-1 and Alpha were seeded mid-July 2007 at a rate of 10g/m2 at both sites. Seeding rate studies were conducted at Bunker Hills Golf Course in Coon Rapids, MN and Green Valley Country Club in Lafayette Hills, PA. Seeding rate treatments were 0, 5, 10, or 20g/m2. At Bunker Hills and Green Valley, T-1 and Alpha were seeded on 8 June and 2 August 2007, respectively. Plots were seeded using a TriWave 60 inch overseeder (Turfco® Manufacturing Co., Minneapolis, MN). For both studies, percent bentgrass establishment was evaluated.
Three months after interseeding at Esmeralda Golf Course, no trends emerged indicating that one establishment technique was more beneficial than another. By the beginning of August 2008 (one-year after interseeding), 37% Poa annua (63% bentgrass) remained in plots when averaged across all treatments. Similar trends were noted at Downriver Golf Course as all establishment treatments yielded similar percent T-1 or Alpha coverage.
One-year after interseeding Alpha at 20g/m2, 48% bentgrass was noted in plots compared to 27% when seeded at 5g/m2 at Bunker Hills Golf Course in Minnesota. Results suggest best seeding rate when interseeding into a fairway ranges from 10-20g/m2.
Establishment technique studies were conducted at Downriver and Esmeralda Golf Courses located in Spokane, WA. Treatments included spiking, aerifying, vertical mowing, no surface disruption, and an unseeded control. T-1 and Alpha were seeded mid-July 2007 at a rate of 10g/m2 at both sites. Seeding rate studies were conducted at Bunker Hills Golf Course in Coon Rapids, MN and Green Valley Country Club in Lafayette Hills, PA. Seeding rate treatments were 0, 5, 10, or 20g/m2. At Bunker Hills and Green Valley, T-1 and Alpha were seeded on 8 June and 2 August 2007, respectively. Plots were seeded using a TriWave 60 inch overseeder (Turfco® Manufacturing Co., Minneapolis, MN). For both studies, percent bentgrass establishment was evaluated.
Three months after interseeding at Esmeralda Golf Course, no trends emerged indicating that one establishment technique was more beneficial than another. By the beginning of August 2008 (one-year after interseeding), 37% Poa annua (63% bentgrass) remained in plots when averaged across all treatments. Similar trends were noted at Downriver Golf Course as all establishment treatments yielded similar percent T-1 or Alpha coverage.
One-year after interseeding Alpha at 20g/m2, 48% bentgrass was noted in plots compared to 27% when seeded at 5g/m2 at Bunker Hills Golf Course in Minnesota. Results suggest best seeding rate when interseeding into a fairway ranges from 10-20g/m2.