Full TGIF Record # 97278
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Web URL(s):http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2003.pdf#page=34
    Last checked: 12/10/2013
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Baumann, Paul A.; Etheredge, Luke M.; Moore, Fred T.; Butler, Twain J.; Matocha, Matt E.
Author Affiliation:Baumann: Professor and Extension Weed Specialist; Etheredge: Extension Graduate Assistant; Moore: Extension Associate; Butler: Assistant Professor and Extension Agronomist; and Matocha: Extension Assistant, Texas Cooperative Extension, College Station, Texas
Title:Weed control efficacy from imazapic and bermudagrass (Cynodon dactylon) tolerance
Section:Weed of range and forest (project 1)
Other records with the "Weed of range and forest (project 1)" Section
Meeting Info.:Coeur D'Alene, ID: March 12-15, 2001
Source:Proceedings of the Western Society of Weed Science. Vol. 56, 2003, p. 32.
# of Pages:1
Publishing Information:Newark, CA: Western Society of Weed Science
Keywords:TIC Keywords: Weed control; Imazapic; Herbicide evaluation; Cynodon dactylon; Pastures; Hay; 2,4-D; Herbicide injury
Cultivar Names:Coastal; Tifton 85
Trade Names:Oasis
Abstract/Contents:"There are approximately 15 million acres of improved pastureland in Texas where broad-spectrum weed control is an important component of bermudagrass (Cynodon dactylon) hay production. Although many broadleaf herbicides are available, grass control has been a recurring problem. Several herbicides have been evaluated in an effort to achieve broad-spectrum weed control of both broadleaves and annual grasses, but significant crop injury has occurred. Recently, BASF Corp. has developed Oasis herbicide which contains the active ingredients imazapic and 2,4-D. It provides broadleaf weed and annual grass control in pasturelands, however, bermudagrass injury from Oasis has been a problem that requires remediation. Research was conducted during 2001 and 2002 to evaluate the effects of Oasis on two popular Texas bermudagrass varieties at two locations. These included Coastal and Tifton 85 bermudagrasses. Plot sizes was 8 ft. x 20 ft. and treatments were replicated four times and arranged in a RCB design. Treatments were applied with a CO2 [CO2] backpack sprayer calibrated to deliver 20 GPA. Two herbicide application timings were evaluated at crop heights of 2-3 in. (stubble) and 6-8 in. (regrowth) within both varieties. Water or urea ammonium nitrate (UAN 32-0-0) were evaluated as herbicide carriers, and Oasis was applied at 2, 4, 6, and 8 oz./A. Dry Nitrogen fertilizer (70 lbs./A) was applied in the water carrier treatments to compensate for the 32% UAN applications in the other treatments. Three harvests were collected after initiating the studies. All rates of Oasis significantly decreased crop yields in the first harvest, regardless of application timing, carrier or variety. No yield reduction was observed in the sequential harvests. In fact, there were significant yield increases in the second harvest from all Oasis treatments in the Tifton 85 bermudagrass study, and from the 8 oz./A treatment in the Coastal bermudagrass study. All other treatments in the Coastal bermudagrass study were equal in yield to the untreated areas. All yields collected in the third harvest were equal. Seasonal yield totals for Coastal bermudagrass over both years showed that all rates of Oasis caused significant yield reductions when compared to untreated plots. Similar results were shown in the Tifton 85 bermudagrass, where rates above 4 oz./A significantly reduced seasonal yields. However, the initial injury in the first harvest was substantial and resulted in significant seasonal yield reductions. Neither application timing or herbicide carrier influenced seasonal yields."
Note:This item is an abstract only!
See Also:Other items relating to: 2, 4 - D in Turf
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Baumann, P. A., L. M. Etheredge, F. T. Moore, T. J. Butler, and M. E. Matocha. 2003. Weed control efficacy from imazapic and bermudagrass (Cynodon dactylon) tolerance. Proc. West. Soc. Weed Sci. 56:p. 32.
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    Last checked: 12/10/2013
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    Notes: Item is within a single large file
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