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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=301
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): | Askew, S. D. |
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| Author Affiliation: | Virginia Tech, Blacksburg, VA |
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| Title: | Lateral movement and tracking of sulfonylurea herbicides |
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| Section: | Symposia - weed management in turf with sulfonylurea herbicides
Other records with the "Symposia - weed management in turf with sulfonylurea herbicides" Section
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| Meeting Info.: | San Antonio, Texas: January 23-25, 2006 |
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| Source: | Proceedings: Southern Weed Science Society 59th Annual Meeting. Vol. 59, 2006, p. 229. |
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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: Herbicide injury; Spray drift; Sulfonylurea herbicides; Weed control
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| Abstract/Contents: | "With registration of several ALS-inhibiting herbicides in turfgrass within the last few years, concerns have been raised about injury to sensitive turfgrass species surrounding treated areas. Data has suggested that these herbicides can be dislodged from the treated area and deposited elsewhere by equipment tires, pedestrians, and runoff water. Several field trials and one laboratory trial have been conducted at Virginia Tech in the last four years to better understand relative differences in mobility between ALS-inhibiting herbicides and to determine methods to decrease injury to sensitive turfgrass in conjunction with treatment on adjacent sites. For tracking studies, herbicides were applied to perennial ryegrass maintained at between 0.75 and 1.5 inch mowing height. At various times after treatment, a greens mower was driven across the treated area and over an adjacent plot of creeping bentgrass L93 maintained at 3/8 inch. Irrigation techniques such as applying 0.1 inch water to the treated perennial ryegrass 2 hours after treatment or to tracked creeping bentgrass immediately after the mower traverses the area were employed in an effort to prevent visual injury symptoms. In addition, stimulatory treatments such as gibberellic acid and foliar iron were applied to areas with visual track injury in an effort to remedy the problem. In some cases, tracking was done at time intervals of 6 hours, 1 day, and 3 days after treatment. Herbicides included rimsulfuron, metsulfuron, foramsulfuron, and flazasulfuron. For runoff studies, herbicides included trifloxysulfuron, rimsulfuron, metsulfuron, flazasulfuron, and pronamide and were applied to overseeded Vamont bermudagrass fairways at Farmington Country Club near Charlottesville or the Turfgrass Research Center in Blacksburg. Two hours after treatment, irrigation was applied (and in conjunction with natural rainfall at FCC) to provide a total of 2 inches water over an eight hour period. Data were collected as visually estimated injury to perennial ryegrass down slope of plots. Plots were 3 ft by 12 ft and were oriented using surveyors equipment to minimize side-to-side slope (less than 1%) and adjust down slope to within 7 to 11 % in all cases. Cups were employed to capture irrigation/rainfall to insure uniformity. The following herbicides are prone to track in the order of most to least injurious to creeping bentgrass: foramsulfuron> rimsulfuron> trifloxysulfuron= flazasulfuron> metsulfuron = pronamide. Radioactive rimsulfuron was water extractable from perennial ryegrass and annual bluegrass leaf surfaces at 60% after 10 minutes, 50% after 1 d, 40% after 3 d, and 35% after 4 d. Irrigating tracked creeping bentgrass did not reduce injury symptoms appreciably. Irrigating the treated perennial ryegrass border area nearly eliminated track symptoms and seems to be the most effective way to avoid track injury on areas adjacent to the treated area. Tracks were evident when the mower traversed foramsulfuron plots at 6 hours after treatment on dry turf or at 1 and 3 d after treatment on dew-moistened turf in the morning. Other herbicides did not cause injury tracks when turf was dry. The following herbicides are prone to cause runoff injury to perennial ryegrass after significant rainfall following treatment in order from most to least injury: pronamide > flazasulfuron > trifloxysulfuron > rimsulfuron = metsulfuron. Runoff severity increases as turfgrass density decreases or as rainfall or herbicide rate increases." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Vision for the future"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Askew, S. D. 2006. Lateral movement and tracking of sulfonylurea herbicides. South. Weed Sci. Soc. Proc. 59:p. 229. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=301
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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