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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=212
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Ferrell, J. A.;
Mullahey, J. J. |
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| Author Affiliation: | Ferrell: Department of Agronomy, University of Florida, Gainesville; Mullahey: West Florida REC, Milton, FL |
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| Title: | Effect of mowing and hexazinone application on giant smutgrass (Sporobolus indicus var. Pyramidalis) control |
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| Section: | Weed management - pastures & rangeland
Other records with the "Weed management - pastures & rangeland" Section
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| Meeting Info.: | Charlotte, North Carolina: January 24-26, 2005 |
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| Source: | Proceedings of the 58th Annual Meeting of the Southern Weed Science Society. Vol. 58, 2005, p. 137. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cultural control; Herbicide efficacy; Herbicide evaluation; Hexazinone; Mowing; Paspalum notatum; Sporobolus; Weed control
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| Abstract/Contents: | "Giant smutgrass is a perennial clump-type grassy weed that commonly infests Florida pastures. Experiments were conducted in 1998 and 1999 in Immokalee, FL to determine if multiple mowing treatments, in combination with hexazinone application at 0.56 to 1.7 kg/ha, would improve giant smutgrass control and increase bahiagrass density. It was observed that mowing did not influence smutgrass control in 1998 or 1999. However, hexazinone application did statistically increase giant smutgrass control, relative to the untreated, at all application rates. In 1998, regression analysis determined that hexazinone applied at 0.56 kg/ha provided >90% control 182 days after application (DAT) and >80% 321 DAT. Both 1.1 and 1.7 kg/ha provided greater than 90% control for 365 DAT in 1998. In 1999, due in part to excessive rainfall, 0.56 kg/ha provided >80% control for only 48 DAT. It was also concluded that hexazinone applied 0.83 to 0.98 kg/ha was the lowest application rates that consistently provided between 80 and 90% control over both years. Bahiagrass density after hexazinone application was also observed. From 0 to 30 DAT, bahiagrass density increased by 17% for the 0.56 kg/ha rate and 2% at the 1.7 kg/ha rate. From 30 to 365 DAT, bahiagrass density increased at 0.04% per day as compared to 0.1% per day for 0.56 and 1.7 kg/ha, respectively. Increased bahiagrass injury by the higher application rates of hexazinone was responsible for low levels of bahiagrass growth from 0 to 30 DAT. However, bahiagrass soon recovered from injury and the higher application rates resulted in a more rapid rate of bahiagrass spread, likely due to less competition of smutgrass in areas treated with 1.1 and 1.7 kg/ha rates. From these data it was concluded that mowing prior to hexazinone application is an unwarranted expense and the 1.1 kg/ha rate provided the most effective and consistent smutgrass control with acceptable levels of bahiagrass injury." |
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| Language: | English |
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| References: | 0 |
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| Note: | "The changing world of weed science"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Ferrell, J. A., and J. J. Mullahey. 2005. Effect of mowing and hexazinone application on giant smutgrass (Sporobolus indicus var. Pyramidalis) control. South. Weed Sci. Soc. Proc. 58:p. 137. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=212
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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