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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1997_vol51.pdf#page=48
Last checked: 07/24/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Taylorson, R. B. |
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| Author Affiliation: | Adjunct Professor, Department of Plant Science, University of Rhode Island |
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| Title: | Evaluations of isoxaflutole as a postemergence herbicide in turf |
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| Meeting Info.: | Newport, RI; January 6-9, 1997 |
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| Source: | Proceedings of the 51st Annual Meeting of the Northeastern Weed Science Society. Vol. 51, 1997, p. 48. |
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| Publishing Information: | College Park, MD: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Broadleaf weed control; Crabgrass control; Digitaria ischaemum; Herbicide efficacy; Herbicide evaluation; Herbicide resistance; Isoxaflutole; Postemergence herbicides
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| Abstract/Contents: | "Field experiments were conducted during 1995 and 1996 to evaluate control of crabgrass (Digitaria ischaemum (Schreb.) Muhl.), broadleaf weeds and turfgrass tolerance to isoxaflutole (R-P EXP 31130A). Studies were conducted at the URI turf research farm on a mixed turf containing about 70 percent Jamestown II Chewings fescue (Festuca rubra var. commutata) maintained at 1.25 inces. Additional studies were conducted on an old athletic field turf of Kentucky bentgrass (Poa pratensis L.) mowed at 1.75 inches. Experiments were randomized complete block designs with four replicates. Plots were five feet wide by eight feet long with a two foot untreated strip between plots. Soils were Bridgehampton silt loams. Treatments were applied with a backpack sprayer in 40 GPA. All rates are given in lb ai/A. Crabgrass was treated at the early- and mid-postemergence stage. Broadleaf weeds were treated on June 9 and July 5, 1996. Weed stands were moderate-heavy in all cases. Broadleaf weeds consisted mainly of white clover (Trifolium repens L.) and dandelion (Taraxacum officinale Weber). Weed control ratings were on a scale of 1-10 with 10 being perfect control and <7.0 unacceptable. Turf injury ratings were also on a 0-10 scale, with 10 being perfect tolerance and <= 9.0 being objectionable. In 1995, isoxaflutole applied as a single application at the early-postemergence stage or as a split treatment (early-& mid-post), gave mixed results. Early-post treatments of 0.18, 0.36, and 0.72 lb/A gave September crabgrass control ratings of 8.1-8.8. Objectionable turf injury occurred early but was gone by 8 weeks after treatment. Other early-post applications of 0.18, 0.36 and 0.5 lb/A gave crabgrass ratings of 9.3 - 9.7 in mid-September. Early turf injury disappeared in 4 weeks. In 1996, 0.18, 0.36 and 0.5 lb/A applied early- or mid-post as single or split treatments provided season-long crabgrass control => 9.3 for early-post and split treatments, but late-post applications were less effective. Injury to the turfgrasses was unique among species and occurred at all rates with severity increasing at higher rates. Injury to the fescue was displayed as an overall lighter color whereas Kentucky bluegrass had fully bleached leaf tips. Both forms were only temporary. Injury to patches of volunteer bentgrasses was severe. Colonial bentgrass (Agrostis tenuis Sibth.) was killed. Some creeping bentgrass (Agrostis palustris Huds.) patches were killed while others seemed to partially recover. Broadleaf weed control with isoxaflutole was dependent on species. White clover was controlled by a single early-spring application of 0.09 lb/A, but even a second application of 0.18 lb/A failed to control all dandelion and broadleaf plantain. (Plantago major L.)." |
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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):
Taylorson, R. B. 1997. Evaluations of isoxaflutole as a postemergence herbicide in turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 51:p. 48. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1997_vol51.pdf#page=48
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 51 |
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