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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Rodriguez, I. R.;
Higingbottom, J. K.;
McCarty, L. B. |
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| Author Affiliation: | Clemson University, Clemson, South Carolina |
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| Title: | Morphological responses of bahiagrass to plateau (imazapic) |
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| Section: | Weed management in turf, pasture, and rangeland
Other records with the "Weed management in turf, pasture, and rangeland" Section
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| Meeting Info.: | 55th Annual Meeting, Atlanta, GA: January 28-30, 2002 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 55, 2002, p. 46. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Bahiagrass (Paspalum notatum) is a warm-season grass often used for pastures and as a low maintenance, utility turf. Bahiagrass is established by seeding and is very drought resistant. The prolific production of seedheads in summer requires mowing to maintain and acceptable aesthetic appearance. These seedheads are also very tough, causing excess wear on mowing equipment. The objective of this study was to evaluate seedhead suppression and other morphological effects of Plateau (imazapic) on bahiagrass. Studies were conducted in 2000 and 2001 on a bahiagrass pasture in Batesburg, SC. Treatments were arranged in a randomized complete block design with 3 replications of 2 treatments in 2000, and 3 treatments in 2001. Plot size was 5 ft by 10 ft. In 2000, treatments consisted of a control and Plateau 2EC at 0.0625 lb a.i. A-1 with methylated seed oil (0.0125%, v/v) applied on 29 June. In 2001, treatments consisted of a control, Plateau 2EC at 0.0625 lb a.i. A-1, and Plateau at 0.0313 lb. a.i. A-1, both with a non-ionic surfactant (0.25%, v/v) and applied on 2 July. In both years, seedheads were not present at the time of application. Data was collected at 2, 4, 6, and 8 WAT in 2000, and up to 10 WAT in 2001. Turf injury was rated visually on a scale of 0 to 100%, where 30% represented maximum acceptable injury and 100% represented dead turf. Turf color was rated visually on a scale of 1 to 10 where 1 represented dead, brown turf and 10 represented healthy, green turf. Seedhead counts were made by counting every seedhead in each plot. Shoot width was measured in cm by averaging six randomly selected shoot widths per plot. At each rating date, two 4-in diameter by 6-in deep cores were taken in each plot. Roots were dried and weighed after washing in both years. In 2001, lengths of six randomly selected shoots were measured from collar to tip at each rating date. In 2000, Plateau showed significantly greater turf injury and lower turf color ratings than the control, although damage never reached unacceptable levels. Plateau inhibited seedheads for the duration of the 2000 study, with no more than 1 seedhead per plot at any rating date. Plateau decreased root dry weights by as much as 1.8 g on the 4 and 6 WAT sampling dates. Shoot widths and shoot counts were not affected by Plateau in 2000. In 2001, turf injury was greater and color was lower for both Plateau treatments for all rating dates, steadily worsening for the full rate while leveling off by 8 WAT for the half rate, possibly due to extended drought during 2001. Plateau at the high rate exceeded maximum acceptable turf injury by 10 WAT. Both rates of Plateau also suppressed seedheads in 2001 beginning 4 WAT, without difference between rates. Shoot lengths were not affected by Plateau treatments until 6 WAT, with shorter lengths by as much as 15 cm under both rates for the remainder of the study. Shoot widths were increased >1.6cm by the high rate beginning at 6 WAT, and there were no differences in root dry weights in 2001. Based on results from this study, Plateau applied at 0.0313 lb a.i. A-1 suppressed seedhead production in bahiagrass without the adverse morphological effects of a higher rate." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rodriguez, I. R., J. K. Higingbottom, and L. B. McCarty. 2002. Morphological responses of bahiagrass to plateau (imazapic). South. Weed Sci. Soc. Proc. 55:p. 46. |
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MSU catalog number: SB 611 .S6 v.54 |
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