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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Belcher, J. L.;
Walker, R. H. |
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| Author Affiliation: | Agronomy and Soils Department, Auburn University, Auburn University, Alabama |
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| Title: | Poa annua and perennial ryegrass removal from bermudagrass turf with tads |
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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. 49-50. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Abstract/Contents: | "Traditional compounds used for postemergence control of annual bluegrass (Poa annua) in turf often produce marginal results. Factors such as leaching, residual activity, and overseeding safety may limit their use. Similarly, products used to selectively remove perennial ryegrass overseeding may only be partially effective while others may cause injury to desirable warm-season turfgrass. The objectives of these studies were to evaluate TADS 14776 (foramsulfuron) for control of annual bluegrass and perennial ryegrass (Lolium perenne) removal. A study was initiated in the fall of 2000 on a non-overseeded `Tifway' bermudagrass (Cynodon dactylon x C. transvaalensis) research plot to evaluate postemergence annual bluegrass control. Experimental design was a randomized complete block with 3 replications. Plot size measured 4 ft. by 8 ft. Treatments were applied using a CO2 backpack sprayer set to deliver 30 GPA. Herbicides and rates (lb ai/A) were: TADS 14776 (foramsulfuron) at 0.013, 0.027, 0.041; and Prograss, (ethofumesate) at 1.13. Applications were made for each herbicide rate Nov. 28, 2000, Feb. 26, 2001, or Nov. 28, 2000 followed by a sequential application Feb. 26, 2001. Visual ratings of control (0-100%) were taken over time with 0% representing no control and 100% representing total control. Ratings of percent Tifway greenup was taken 126 days after Nov. treatment, 37 days after treatment when application made in Feb. (126/37 DAT). Data was subjected to ANOVA and means separated using LSD (p=0.05). A separate study was conducted beginning May 1, 2001 to evaluate perennial ryegrass removal from overseeded `Tifway' bermudagrass. Plot size measured 4 by 10 ft. Experimental design was a randomized complete block replicated 3 times. Treatments were applied with a CO2 backpack sprayer set to deliver 30 GPA. Herbicides and rates (lb ai/A) included TADS 14776 at 0.013, 0.027, and 0.041; Manor (metsulfuron) at 0.019; Kerb (pronamide) at 1.0; and Illoxan (fenoxaprop) at 1.0. Additionally, some treatments received Genapol X150, a non-ionic surfactant (NIS), at 1.25% and/or additional nitrogen applied May 7 and May 23, 2001 at a rate of 1.0 lb N/1000 ft2. Visual ratings were taken over time and included perennial ryegrass control (0-100%) and percent `Tifway' density (0-100). Data was subjected to ANOVA with means separated with LSD (p=0.05). Two applications of foramsulfuron at any rate controlled annual bluegrass >97% 126/37 DAT and remained at this level until study's end. The only single application made in Nov. to provide >80% control was foramsulfuron at 0.041 lb ai/A (81%). Foramsulfuron at 0.027 and 0.041 applied in Feb. provided 78-83% annual bluegrass control 55 and 72 DAT. Tifway percent greenup was highest (82-84%) 126/37 DAT with all rates of foramsulfuron applied twice. No other treatment approached this level of greenup at this rating. Ethofumesate failed to control annual bluegrass above acceptable levels (70%) at any rating. Control of perennial ryegrass 31 DAT was 91, 89, and 94 % with foramsulfuron at 0.041, 0.027+NIS+N, and 0.041+N, respectively. Control ranged from 80-86% with foramsulfuron at 0.027, 0.027+NIS, 0.027+N and metsulfuron at 0.019. Greatest Tifway density 31 DAT was 85-86% with foramsulfuron 0.027+NIS+N and 0.041+N." |
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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):
Belcher, J. L., and R. H. Walker. 2002. Poa annua and perennial ryegrass removal from bermudagrass turf with tads. South. Weed Sci. Soc. Proc. 55:p. 49-50. |
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MSU catalog number: SB 611 .S6 v.54 |
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