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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1998_vol52.pdf#page=73
Last checked: 07/24/2013
Requires: PDF Reader
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): | Pennucci, Annamarie |
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| Author Affiliation: | Research Scientist, Northeast Turf and Ornamental Control, Milford, NH 03055. |
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| Title: | Quinclorac and quinclorac tank-mix timings for season long control of crabgrass in turf |
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| Section: | Turfgrass and plant growth regulators Wednesday-January 7, 1998
Other records with the "Turfgrass and plant growth regulators Wednesday-January 7, 1998" Section
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| Meeting Info.: | Washington, DC: January 5-8, 1998 |
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| Source: | Proceedings of the 52nd Annual Meeting of the Northeastern Weed Science Society. Vol. 52, 1998, p. 73. |
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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: Application timing; Crabgrass control; Herbicide efficacy; Herbicide evaluation; Phytotoxicity; Quinclorac; Tank mix
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| Abstract/Contents: | "Quinclorac, an experimental crabgrass herbicide of BASF was evaluated alone and in tank-mix combinations with pendimethalin and / or trimec at each of four timings. Applications were made at early preemergence (A), late preemergence (B), early / mid postemergence (C), and late postemergence (D) timings and at the multiple application timings of A+B, A+C, A+D, B+D. Prodiamine applied w/wo trimec at timing A, was used as a standard. Treatments were applied with a 4 gallon Solo backpack sprayer delivering 1 gal dilutent per 1000 sq. feet at 30 psi. Plot size was 15 sq. ft with five replicates in a randomized block design. A mixed turf of high maintenance Kentucky bluegrass cultivars maintained at 6 lbs actual N per 1000 per annum were mown at 0.75 inches twice weekly. Crabgrass had accounted for greater than 65% of all plot area in August of the year previous (1996). Treatments were also applied to non-turf edges comprised of diverse annual and perennial broadleaf weeds and residual crabgrass. Quin A₂ provided nearly 8 weeks of preemergent crabgrass control and caused substantial phytotoxicity and suppression of sorrel, shasta daisy, carpetweed, mustard, yarrow, and mallow. Quin + Tri A provided identical crabgrass control but also provided good to excellent control of clover, dandelion, dianthus and coreopsis. Quin + Pend A provided nearly 12 weeks of crabgrass control while the addition of trimec extended the range of broadleaf weed control. The repeat application timings of Quin A+B controlled crabgrass for 11 WAT, the A+C timing for 14 WAT, and the A+D timing for 21 WAT (season-long). Quin A followed by Quin + Tri B, C, or D enhanced BLW control and extended the crabgrass control to 13, 15 and 21 WAT, respectively. Pend A followed by Quin B, C or D provided 11, 13, and 21 weeks of control, while Quin + Pend A followed by Tri D or Quin + Pend + Tri B gave 12 weeks of control. Season long control (21 weeks) was observed when Quin + Pen + Tri A was followed by the same combination D. Quin B provided excellent pre/post control of crabgrass with a duration of 10 WAT. Quin B+D gave season long control as did Quin B followed by Quin + Tri D. Prodiamine provided 16 weeks of control; the addition of Tri extended control to 18 weeks while controlling most BLW. Little or no phytotoxicity was observed at any timing with Quin alone or repeated, or with prodiamine. Some phytotoxicity was noted with Quin A followed by Quin + Tri B(3) or C(4) but not D, while moderate levels of phytotoxicity were noted for Quin A followed by Quin + Tri B(3) or C(4) but not D. Substantial damage was also noted for Quin+Pend A+Tri D(6) and for Quin+Pend+Tri A followed by the same at D(6). Quin+Pend+Tri B (6) was also unacceptable. Generally the tank mixes of Quin+Pend or Quin+Pend+Tri yielded unacceptable phyto levels while the levels seen with Pend followed by Quin were tolerable. In most cases, the phytotoxicity could be traced to an incitement of disease by leaf-spot fungi. BLW control was greatly enhanced when Tri was tank mixed with or followed Quin application. Midseason applications of Quin (C) were less effective, purple discoloration was often followed by recovery. However, Quin proved extremely effective at timing D, rapidly killing crabgrass in inflorescence or in seed. Quinclorac provides a huge window of application with best efficacy seen at pre/post or late post timings." |
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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):
Pennucci, A. 1998. Quinclorac and quinclorac tank-mix timings for season long control of crabgrass in turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 52:p. 73. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1998_vol52.pdf#page=73
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. 52 |
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