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1 July 2008 Creeping Bentgrass (Agrostis Stolonifera) Tolerance to Sulfosulfuron
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Abstract

Sulfosulfuron was recently registered for grassy weed control in creeping bentgrass, but turf sensitivity is a concern for intensively managed golf courses. Field and growth chamber experiments in New Jersey investigated creeping bentgrass growth responses and tolerance to sulfosulfuron. Creeping bentgrass chlorosis increased with sulfosulfuron rate but turf had less chlorosis from sequential sulfosulfuron applications compared to bispyribac–sodium. Herbicide-treated turf had similar root weight compared to untreated turf on six sampling dates. In growth-chamber experiments, creeping bentgrass treated with sulfosulfuron had chlorosis and clipping weight reductions exacerbated by reductions in temperature from 25 to 15 C. Overall, creeping bentgrass appears to tolerate sequential sulfosulfuron applications better than or comparable to bispyribac-sodium in early summer, whereas creeping bentgrass sensitivity to sulfosulfuron increases at cooler temperatures.

Nomenclature: Bispyribac–sodium; sulfosulfuron; creeping bentgrass, Agrostis stolonifera L. AGRST

Patrick E. McCullough and Stephen E. Hart "Creeping Bentgrass (Agrostis Stolonifera) Tolerance to Sulfosulfuron," Weed Technology 22(3), 481-485, (1 July 2008). https://doi.org/10.1614/WT-07-039.1
Received: 7 March 2007; Accepted: 1 April 2008; Published: 1 July 2008
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