Monday, 6 October 2008: 10:15 AM

George R. Brown Convention Center, 382AB

Patrick McCullough, Rutgers Univ., Rutgers Univ., 59 Dudley Rd, New Brunswick, NJ 08901 and Stephen Hart, Foran Hall, 59 Dudley Rd., Rutgers State University Accounts Payable, Rutgers University, Department of Plant Biology & Pathology, New Brunswick, NJ 08901

Bispyribac-sodium selectively controls annual bluegrass (Poa annua L.) in creeping bentgrass (Agrostis stolonifera L.) and perennial ryegrass (Lolium perenne L.) which may be attributed to differential metabolism among species. To test this hypothesis, laboratory experiments investigated metabolism of ¹⁴C-bispyribac-sodium in annual bluegrass, creeping bentgrass, and perennial ryegrass. Creeping bentgrass and perennial ryegrass metabolized ¹⁴C-bispyribac-sodium by approximately 50% after one day while annual bluegrass metabolized less than 20%. After seven days, parent herbicide recovered in annual bluegrass, creeping bentgrass, and perennial ryegrass was 73, 32, and 39% of total radioactivity per species, respectively. Polar metabolites recovered after seven days in annual bluegrass, creeping bentgrass, and perennial ryegrass were 24, 59, and 55% of total radioactivity per species, respectively. Half life of ¹⁴C-bispyribac-sodium in annual bluegrass, creeping bentgrass, and perennial ryegrass was estimated at greater than seven days, one day, and two days, respectively. Results support the hypothesis that differential tolerances of these grasses are attributed to herbicide metabolism.

See more of: Graduate Student Oral Competition: Physiology and Diseases
See more of: C05 Turfgrass Science

2008 Joint Annual Meeting (5-9 Oct. 2008): Bispyribac-sodium Metabolism in Annual Bluegrass, Creeping Bentgrass, and Perennial Ryegrass.

561-9 Bispyribac-sodium Metabolism in Annual Bluegrass, Creeping Bentgrass, and Perennial Ryegrass.