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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Grichar, W. J.;
Nerada, J. D.;
Jaks, A. J.;
Netardus, A. J. |
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| Author Affiliation: | Texas Agricultural Experiment Station and Texas Cooperative Extension, Cuero, Texas |
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| Title: | Oasis for pasture weed control and bermudagrass tolerance |
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| Section: | Research posters
Other records with the "Research posters" 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. 194. |
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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: | "Field studies were conducted during the 2000-2001 growing season to evaluate Oasis (imazapic + 2,4-D) for broadleaf weed control and bermudagrass [Cynodon dactylon (L.) Pers.] tolerance. Field studies were set up on plots 1.9 m wide by 8.1 m long. Each study was replicated 3-4 times. Herbicides were applied with a CO2 backpack sprayer equipped with three SS-11002 flat fan nozzles spaced 50 cm apart and calibrated to deliver 140 L/ha at 160 kPa. Weed control and grass stunting were visually estimated using a scale of 0 (no control or bermudagrass stunting) to 100 (complete control or bermudagrass death) 4 wk after herbicide applications and on 4 wk intervals thereafter. In a 'Tifton 85' bermudagrass study, Oasis at 292 to 877 ml/ha resulted in 53 to 87% bermudagrass stunt when rated 4 wk after herbicide application. When rated 20 wk after herbicide application, bermudagrass stunt ranged from 28 to 72%. Bermudagrass stunt increased as herbicide rate increased in both instances. When 'Tifton 85' was initially hervested 6 wk after application none of the Oasis treated plots produced any yield while the untreated yielded over 12,500 kg/ha. Subsequent 'Tifton 85' harvests taken 19 wk after herbicide application showed that Oasis at 730 and 877 ml/ha reduced bermudagrass but no yield reduction was noted when harvested 28 wk after application. In 4 of 6 other studies on 'Coastal' bermudagrass, stunting was noted with all Oasis rates. Weed control using Oasis was variable and depended on the weed species. Oasis at 292 to 584 ml/ha controlled 68 to 90% Johnsongrass [Sorghum halepense (L.) Pers.] but controlled < 29% rain lilly (Cosperia traubii Hayward). Oasis at 292 ml/ha or greater applied to horsemint [Blephilia ciliata (L.) Benth] less than 15 cm tall provided > 95% control while Oasis at 146 ml/ha controlled < 85% horsemint. Brownseed paspalum (Paspalum plicatulum) control increased as the rate of Oasis increased." |
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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):
Grichar, W. J., J. D. Nerada, A. J. Jaks, and A. J. Netardus. 2002. Oasis for pasture weed control and bermudagrass tolerance. South. Weed Sci. Soc. Proc. 55:p. 194. |
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MSU catalog number: SB 611 .S6 v.54 |
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