Bispyribac-sodium, Sulfosulfuron, and Interseeding Creeping Bentgrass for Long-term Control of Roughstalk Bluegrass

作者：Rutledge James M^*; Morton Debbie E; Weisenberger Daniel V; Reicher Zachary J

来源：Hortscience, 2010, 45(2): 283-287.

DOI：10.21273/hortsci.45.2.283

• Poa trivialis
• interseeding
• certainty
• velocity

Roughstalk bluegrass (Poa trivialis L.) contamination is problematic oil golf course fairways from the Midwest to the mid-Atlantic regions of the United States. Bispyribac-sodium and sulfosulfuron have potential to selectively control roughstalk bluegrass. Our objectives were to determine the most effective herbicide treatments for short- and long-term roughstalk bluegrass control and to determine if interseeding with creeping bentgrass (Agrostis stolonifra L.) after herbicide treatments will improve long-term control of roughstalk bluegrass or conversion to creeping bentgrass. Plots were treated with bispyribac-sodium or sulfosulfuron and then half of each plot was inter-seeded with creeping bentgrass in early August, 2 weeks after the final herbicide application in 2006, 2007, and 2008 in Indiana. Roughstalk bluegrass cover reduction was highest when treated with bispyribac-sodium at 56 or 74 a-ha(-1) a.i. applied four times or sulforsulfuronat 27 g-ha(-1) a.i. applied three times. Interseeding with creeping bentgrass improved long-term roughstalk bluegrass control and quickened conversion to creeping hentgrass. Furthermore, bispyribac-sodium and sulfosulfuron appeared to be more effective in the first 2 years of the study when seasonal heat stress was greater, which appeared to improve long-term roughstalk bluegrass control and promoted creeping bentgrass establishment. Chemical names used: {2,6-bis[(4,6-dimethoxypyrimidin-2-yl)oxy] benzoic acids (bispyribac-sodimu), {1-[4,6-dimethoxypyrimidin-2-yl]-3-[2-ethanesulfonyl-imidazo(1,2-a)pyridine-3-yl) sulfonyl]urea} (sulfosulfuron).

• 出版日期2010-2